DE3248538A1 - SLIDE PROJECTOR CONTROL DEVICE - Google Patents

Description

Slide projector control device

Description 5

The invention relates generally to the field of slide projectors and in particular a controller for controlling slide magazine positioning and operation according to a pre-recorded program tape or by means of Input from a local or remote keypad.

There are various control devices for slide projectors for controlling the positioning of the slide magazine

into a slide position and how a Dia-15 works

Wechsler, who brings the slide into a viewing position. These different control devices can be controlled either in manual mode or in an operating mode with random access. Arrangements of this Art are disclosed, for example, in GB-PS 20 80 965 and in U.S. Patents 3,296,727, 3,225,652,

3 299 554, 3 895 864, 3 907 414, 3 924 942, 3 566 370,

4 041 457, 3 510 215, 3 644 027, 3 733 122, 3 652 155, 3 623 803, 3 700 320 and 3 732 546.

While the known control devices described above are suitable for their appropriate use are, it seems desirable to control the slide magazine positioning more precisely and additionally the slide projector loading

_{ori to} provide drive modes and functions in local, remote and automatic operation of the slide projector.

According to one aspect of the present invention a control device for a slide projector provided with a drive ZTransportvorrichtung for carrying a Slide magazine that defines a large number of slide positions

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and for selectively moving the slide magazine to the slide positions to offer a slide show station, and with a device for determining the position of the drive / transport device, wherein the locking device is characterized by a device responsive to the position of the drive / transport device for generating the degree of alignment between each slide position and the slide changing station Feedback signals "when slide positions located within a predetermined positioning range of the slide changing station, wherein the control device is further characterized by a device for generating a slide motion signal and one for the slide motion signal and responding to the feedback signals-15

de Device for controlling the operation of the drive / transport device.

According to a second aspect of the present invention is a control device for a slide projector characterized by a control device responsive to predetermined encoded slide address signals at a Data take input responds to slide magazine motion control signals and by a transport device that responds to the slide magazine movement control signals 25th

responds and the position of a slide magazine to predetermined To control slide positions in accordance with the encoded slide address signals, each of the encoded slide address signals corresponds to a corresponding slide position in a slide magazine and as a predetermined combination encoded by audio sound power surges.

A preferred embodiment of the present invention can be a control device for positioning of a slide magazine, achieving precise control of slide positioning in a servo mode

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which is the differential output signal from double photodetectors and a single incremental slide aperture corresponding to all slides in a slide saga ** Zin is used, with the corresponding openings circumferentially are arranged on a coded ring carried by the slide magazine turntable.

A preferred embodiment may also include a random access controller for controlling the projection of slides from a slide magazine according to a coded program tape with slide address signals show, wherein the control device also the coded program tape by means of recording the slide address signals in response to input signals from a keypad.

A preferred embodiment can also provide a control device for a slide projector for Input of slide address signals and to control various punctures of the slide projector according to predetermined Command code input signals and / or according to the actuation of associated function controls.

A preferred embodiment also brings a 25

Slide magazine position sensing assembly for a slide projector controllable to selectively move the path of one of two encoded position assemblies according to FIG the type of slide magazine inserted into the slide projector.

A preferred embodiment may include a control device for use with a slide projector show with a drive / transport device for moving a slide magazine and with a Peststellvorrichtung to determine the position of the drive /

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Transport device. The detection device has a feedback signal generating device for generating a feedback signal representing a slide magazine position. The control device also has means for generating a slide motion signal and a control means responsive to the slide motion signal and the feedback signal for controlling the operation the drive Z-transport device for positioning of the slide magazine responds »In one arrangement, the slide motion signal generating device responds encoded slide address signals. The controller in another arrangement also has a manual operable device for inputting the slide address encodings to generate the encoded slide address signals, that can be recorded on a medium. The manually operated input device in an arrangement has a large number of input devices for entering the slide address codes and operating

art command codes, such as numeric codes. the 20th

manually operated input device in different

Arrays include both remote and locally located input devices. The drive device one device is provided with a coded arrangement which has two planar arrangements accordingly 25th

two different types of slide magazines, each with a different number of slide positions. The locking device determines the position of the coded arrangements »The locking device in a Device has a selectively adjustable device,

the first of a first aligned with a first planar array for a first type of magazine position aligned in a planar configuration with a second type for a second magazine second posi- tion c is moved. The selectively positionable device is responsive to a predetermined portion

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of the second type of magazine moved.

Embodiments of the present invention will now be described with reference to the drawings. Show it

1 shows a block diagram of the control device of an exemplary embodiment for the operation

a Diapro Rector,
10

FIG. 2 is a more detailed block diagram of FIG

Control device of the embodiment according to Pig. 1,

Figure 3 is a logical and schematic diagram

a magazine indexing circuit of the control device of FIGS. 1 and 2,

4a and 4b, put together according to FIG. 4c, a logical one and a schematic picture of the control device of FIG. 2,

Fig. 5 is a plan view of the units of the control device Figures 1, 2 and 4, at

the parts are broken away for the sake of clarity, showing the the slide magazine, the coded opening slide position ring and the feedback scanning

_o - arrangement of the control device load-bearing

Turntables,

Fig. 6 is a section of the device along the Line VI-VI of Fig. 5,

7 shows a detail to illustrate the

coded opening ring and the turntable

the control device according to the figures i to 4,

8 shows a section of the device along the line VIII-VIII of Fig. 7,

FIG. 9 shows a section similar to that of FIG. 6 to illustrate the operation of FIG Slide position scanning arrangement with another slide magazine,

10 is a graph showing waveforms at various positions in the control device of Fi-15

gures 1 to 4,

11 is a graphical representation of a typical slide address surge waveform generated by the control device of FIGS. 1 to 4

is coded for a random access mode of operation,

Figures 12a and 12b assembled. In the manner indicated, a logic flow diagram for Veranschauli ™ monitoring of the general flow of program steps, such as those performed by the control device of the embodiment for encoding Diaadressensignalen for a program Band ₃ Q,

Figures 13a and 1Jb put together as indicated logical flow diagram to illustrate the general flow of program steps, as indicated by the control device of the Aus

example for decoding slide addresses

sensor signals are carried out by a program tape,

14 is a schematic logic block diagram showing a CPU control unit and other units of the control device of Figures 1 and 2, and

Figures 15 and 16 are graphs for illustrative purposes of signal forms of the operation of the control device under different load conditions of the slide magazine drive arrangement.

Referring to Fig. 1, the controller 10 and the CPU controller 24 serve random access according to the invention for performing a random access operation of the projector. The control device 10 controls in response to control signals on 14, the rotation of the slide magazine and the operation of a slide changing mechanism to control the movement of one adjacent to the slide projection station movement between a viewing position and a slide magazine position steer.

The control signals on 14 are digital signals on one or more lines that can be operated in a forward or reverse mode represent the slide magazine movement and to which the control device 10 responds to in suitable way to move the slide magazine into a desired position.

The projector of Fig. 1 has a tape cassette assembly, generally indicated at 42, with suitable controls for controlling the transport of a cassette

tape 44. A tape transfer head 40 provides an MF output signal at eJno advance level 3ί? 0 <> which emits an LF output signal 38 »The cassette tape carries encoded slide address signals in one track and recorded voice information in a separate track » The voice track information is provided by an audio circuit in an Audi ο lamp and power supply circuit stage 34 to be processed »Thus, a synchronized language program and a selection of slides are temporally related commanded.

With a manual operation arrangement with random access for a projector of Fig. 1 is the CPU control the control signals on 14 via a connection signal

path 26. The CPU controller 24 is responsive to input signals from a keypad 28 to the controller 10 can be operated with random access. A desired The number is entered via the keypad 28 and the CPU controller 24 determines the appropriate one

Rotation of the slide magazine via the control device 10, what rotation is required to bring the desired slide into the slide change viewing position, such as this will be described later.

The CPU controller 24 also speaks to encoded burst signals in an automatic random access mode (BUHST) on the cassette tape 44 defining specific slide address positions in the slide magazine. the CPU control 24 decodes the encoded slide address burst signals on a data line 25a which is at the output the preamplifier stage 350 is connected, and outputs control signals to 14 via interconnect signal path 26 for a random access operation according to FIG the recorded program cassette banci.

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The CPU controller 24 also performs recording on program cassette tapes through a data line 25b in response to input signals from keypad 28 in a program recording mode Recording the corresponding encoded slide address signals in a burst signal format on the program tape 44. Operating mode and function controls are also coded by the CPU controller 24.

In an alternative embodiment of the projector after Pig. 1 operating without a CPU controller 24, control signals are applied to 14 from a magazine forward / backward indexing control switch 16 of the local

Control panel 18 delivered. The local tax 15

Panel 18 also has an on / off power switch and a lamp mode control circuit. The control signals on 14 can also be sent from a remote control unit 20 delivered via a distance cable connection 20 will. The remote control unit 20 provides forward and reverse slide advancement controls.

In this alternative embodiment, a

I switch control signal 12 from a digital filter stage 25th

36 submitted. The control signal 12 is similar to the control signal 14 from the control device 10 for control the rotation of a slide magazine and used to operate the slide changing mechanism. The control signal 12 represents a slide advance signal generated by the program tape 44 is derived and to which the control device 10 responds to the slide magazine by a slide position advance in response to each occurrence of signal 12. The digital filter stage 36 is with the LF output 38 of the preamplifier stage 350 is connected. That Cassette tape 44 has 1 kHz sine waves or encoded

Stepping current surges, which are decoded by the digital filter stage 36, to the desired stepping control signals on 12 according to the desired program recorded on the cassette tape 44.

In a preferred embodiment of a CPU controller 24 using the projector, the forward / reverse control 16 of the local control 18 is omitted, there are forward and backward buttons on the keypad 28 are attached. The remote control unit 20 is also not used. Even the digital filters cufe 36 is not required and output 12 does not work. The CPU controller 24 performs all necessary decodings of the encoded slide address signals on the program cassette tape 44.

The projector with the CPU controller 24 also inputs Control signal 14 via the interconnection 26 by means of a wireless remote control transmission unit and a receiver 32. The remote control transmitter or transmitter unit 30 and receiver 32 operate for example on the basis of infrared energy transfer. The receiver 32 speaks to the transmitted Signals from the transmitter 30 and gives the desired slide information as data signals to the CPU controller 24. In a particular arrangement, the remote control and transmission unit 30 is provided with a keypad, such as the keypad 28, equipped in such a way * that the complete Working and controlling the control device 10 is accomplished by the remote control transmission unit 30 will.

The keypad 28 in the preferred embodiment has 10 numeric keys corresponding to the number to 9 and bears the corresponding markings. The keypad also has various other function keys.

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In the preferred embodiment, function keys are PAUSE / RESTART, FORWARD ONE, REST, REVERSE IN / RECORD, TRANSITION TO EXECUTE and

CLEAR. The actuation of each of the functional tests, such as 5

it is sensed by the CPU controller 24 directly either a function to be carried out by the control device or a command or Operating mode input to which the CPU controller 24 responds, as will be described below. Except for that Numeric keys that are actuated to set slide address numbers for either manual operation with optional The CPU control speaks for entering access or for coding a program tape with random access 2A- also to the actuation of the numeric keys for entering predetermined operating mode command inputs at. For example, in the preferred embodiment, the numbers 1 through 14-0 are input via the keypad reserved for the designation of slide address positions. The operating mode command inputs are over

correct numerical coding according to the desired Number of operating mode command inputs assigned.

In a special embodiment example

'Have the operating mode commands encodings with three digits 25

remotely assigned in the range between 200 and 220 and the CPU control 24 recognizes the corresponding predetermined Operating mode command codes and responds according to the predetermined assigned function or operating mode. If a program tape is created, the entries are made

coded by different operating mode command codes and recorded along with the slide address numbers. During playback of the recorded program tape, the CPU control decodes the mode command signals together with the slide address signals to control the projector appropriately.

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Εε should now be the mode of operation of the control device Responding to the operation of the function keys "considered will. The actuation of the home position key leads to a recognition of a command by the CPU control 24, the slide magazine in the predetermined slide zero position to rotate, which is useful after a slide show, for example. Pressing the DELETE ™ Button is activated by the CPU control 24 as a request to delete the (in Pig »14 referred to as 550) Recognized display, this puncture is required, for example, if a user makes an input error power. ·

Pressing the PAUSE-ZHEUSTAEiD-Ia-Ste causes the CPU controller 24 sends a pause control signal to the tape cassette controller 42, to stop the program tape cartridge at any time during a program, when the cassette tape is activated. Another loading. pressing the PAUSE key results in a removal ' stopping and restarting the program tape. Pressing the FORWARD ONE key results in the manual port switching of the DIAMAGAZINE in the forward direction by one slide per keystroke. the

REVERSE RECORD ONE button allows the 25th

To cause users in "a manual mode of operation, that the slide magazine is switched back one slide at a time. If the device is in the recording mode, then actuating the REVERSE

_o _ RECORD ONE button 'records an encoded power surge in the program track of the cassette tape according to keypad entries

_o _ performs a predetermined puncture that was previously entered via the keypad, such as entering a

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Operating mode command signal or entering a slide number.

In a particular illustrative embodiment, the following numerical encodings are shown in FIG Table I assigned to the corresponding functions:

TABLE I.
10

OPERATING MODE FUNCTION

COMMAND EDITION

200 SELF-DEVELOPMENT - 5 SECONDS

-201 SELF-PROGRESSION - 10 SECONDS

202 SELF-DEVELOPMENT TOTG -15 SECONDS

203 UNDEFINED BREAK

204 SELF PAUSE - 5 SECONDS

205 SELF-PAUSE - 10 SECONDS 206 SELF-PAUSE - 15 SECONDS

207 KEYPAD SWITCH-OFF

208 KEYPAD RELEASE

209 REMOTE CONTROL ON

210 REMOTE CONTROL OFF -211 DISPLAY OFF

212 DISPLAY UNLOCKED

213 RECORD ON 220 VOICE PLAYBACK

The functions of Table I are now to be considered in detail, as they are represented by the corresponding operating mode command codes being represented. The operating mode command codes 200, 201 and 202 respectively correspond programmed automatically time-controlled increments to the slide magazine every 5 »10 or 15 seconds to advance one position at a time. The car-

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Automatic time-controlled switching of each slide takes place until the pause button is pressed. The self-switching takes place either from the program tape or by direct input via the keypad 28. The self-advancing operating mode command codes 200, 201 and 202 are selectively responsive on a program tape on the corresponding keypad entries of the .code number-200, 201 or 202 coded.

If one considers other operating mode command codes of Table I, then in a preferred embodiment the operating mode command codes 200 to 212 as coded bursts of sound on a program tape -

, _ can be drawn and can be accessed by the CPU control 24 from Ib

a program band control operation of the projector will. Furthermore, the mode command codes 200 to 202, 209, 211, 212 and 213 are in one manual operating mode by direct input via the keypad 28 effective. The operating mode command codes 200 to 202 and 210 to 213 can also be activated via the remote control unit 30. The operating mode command coding 203 defines the function of an indefinite pause, which is used to transport of the program tape via the cassette control 42 to stop «, the tape transport is stopped or paused until the PAUSE / RESTART button on the keypad 28 is pressed.

The display 530 of FIG. 14 shows the current one Slide number position along with three decimal points indicating the pause mode. The self-pause functions, represented by mode command codes 204, 205 and 206 correspond to automatic Pauses of 5, 10 or 15 seconds in order to transport the Cassette program tape for the specified period of time.

hold up »The CPU control 24 decodes the operating mode command codes 204, 205 or 206 from the program tape and controls the pause of the cassette via the

Cassette control.
5

The mode command code 207 corresponds to one Keypad lock function »which is encoded and recorded on the program tape. When the keypad lock mode command coding 207 from the program tape is decoded, then the keypad 28 is blocked and inputs via this keypad are ignored. The decoding of the coded mode command coding 208 from the program tape unlocks the keypad. The '^ INTERFACE CONTROL ON "command coding makes the remote control unit 50 effective when entered via the keypad 28 and blocks the recognition further inputs via the keypad 28. To put the keypad 28 back into operation, the operating mode command coding 210 using the keypad of the remote

th control unit 30 entered.

The operating mode command codes 110 and The functions of display suppression and display enable can be activated by entering them via the keypad 28 or can be initiated by coded signals on the program tape in order to activate the display function accordingly steer. Is the display suppression function on the Program tape recorded, then the display remains active, but only in the playback mode.

of the program band is suppressed. The record enable command encoding 213 as shown on the keypad 28 is entered serves as part of a recording sequence as will be described below. The remote command signal 220 represents the voice feedback mode represent synthesized speech

as linguistic feedback to

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user when keys or inputs are pressed on the local or remote keypad. The voice feedback can be used in the case of a special

Leadership examples are also available during that period

be the one during which the display with a new slide address number or a command mode code number is updated »In the In the preferred embodiment, an operating mode command coding is used to initiate a self-maintenance routine by the CPU controller 24 for troubleshooting. It should be noted that various other mode code numbers are used and corresponding predetermined functions in addition to the previously discussed operating mode 3e. incorrect codes can be provided,

to bring about a control of the various functions of the projector, which are directed to a projection LsTup s control, on "blackout and lightening sequences and zoom lens control as well as on frame filling functions _.;

When operating the projector in a manual operating mode, when making entries via the keypad 28 or the remote control keypad will be done after the user has either provided the slide address number from a manual random access operation, or a mode command code number from the Keypad has entered 28, the GO FOLLOW-UP / LEAD-OFF button operated to command the GPU controller 24 to

QQ to accept the input and to carry out the desired function. When the display is turned on, it is used to indicate key presses, except during the time an encoded burst signal is being recorded on the program tape during the recording mode. While a burst of sound is being recorded, the display is suppressed to visually indicate the recording function.

Thus, the use of the numeric keys for the slide address numbers and as input for the operational command encodings results good use of the buttons

a minimum number of keys required, further 5

facilitates the user the presence of certain Basic function keys in combination with the operating mode command input codes control the control the basic functions. The mode commands and slide address encodings are used in the preferred embodiment encoded by digitally encoded burst forroates with the same binary configuration as the basic ten digit encodings of the keypad. Thus, the CPU controller 24 decodes the various ones coded instruction codes from the program tape and accomplished proper control of the projector.

The control device 10 has a logical forward / Reverse stage 50 responsive to the mode port switch control signals 12,14. The logical Vorxvärts- / 20th

Reverse stage 15 generates forward and reverse loads

Drive mode signals 52 at the logical slide lift stage 54 and a logical slide magazine stage 56 in line with the state of the input signals 12, 14. In response to a forward or reverse mode -25

signal from stage 52, the logical increase stage 5 ^ - is set in the slide lift mode and gives an output on 58 to the driver amplifier 60 for the Slide lift motor off. The motor driver amplifier 60 drives the slide lifting motor 64 via the output 62 in order to move the slide

from the projection position to an upper slide magazine position by operation of a slide lifting mechanism 68. The slide lift mechanism 68, which is not i ^

individual receives a setup signal from the Diaanhebemofcor 64 to a screw with reversible Promote or drive a screw.

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During the normal steady state of the projector including the initial power-up of the System and between the slide changes, the lifting logic 54- is conditioned in such a way that the slide lifting mem-. - ■

mechanism 68 in the downward-facing Diaprojek- ' tion position while a slide 66 is in the projection position. So should a new one Slide for the projection in the operating mode "advance by a single slide" in the slide programming mode with random access or in the operating mode quick search between different slide magazine positions are selected, the basic operating cycle begins with the lifting of the particular slide that is currently in the projection position, back to the upper magazine position, and this is followed by the controlled rotation of the slide magazine by one or more slide positions, which leads to the lowering of the desired one Slide for representation in the projection position using of the slide lifting motor 64 ends.

A lift position sensing arrangement 70 is suitable Manner is provided in the vicinity of the slide lifting mechanism 68 and includes upper and lower limit pulls scanning switch to set a predetermined movement of the slide lifting mechanism 68 between a predetermined magazine position and a predetermined projection position at the slide lifting station. The lifting position sensing assembly 70 provides outputs on 72 3Q the logic stage 54- to control the operation of the raise signal 58 to quit and thus in more suitable Manner to drive the slide lifter mechanism 68 between the predetermined up and down positions. A current sampling stage 74- monitors the current through the slide lift motor 64- and gives a shutdown control signal at output 76 to the logical lifting step 54 · in the event that

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a current of excessive value is detected. the logic boost level 54 responds to an excessive current condition on 76 and terminates the driver »-

signal to the slide lift motor 64.
5

After the slide, which is currently in the projection position, has been lifted into the slide magazine position was, the control device 10 runs into the

Slide magazine movement mode in which the slide magazine 10

to respond to one or more positions in an appropriate forward or reverse direction the forward-ZReverse logic stage 50 is moved.

In particular, the signal 72 from the lifting position

Scanning arrangement 70 as an input to the logic Slide magazine level 56 created. The logical slide magazine level 56 is placed in the magazine drive mode in response to the signal on. Under appeal on the state of the forward or reverse

Operating mode signal 52 as an input signal to the logical slide magazine stage 56 is the logical slide magazine stage 56 to 80 an appropriate forward or reverse magazine drive signal to the magazine motor driver amplifier 82. The logical slide magazine level 56 has

also a mode select hold circuit which is in either a forced mode or a servo mode is working. In addition, the slide magazine logic stage 56 provides a mode control output signal OQ to turn off the logical lift stage 54 in order to ensure that the lifting function is switched off, when the slide magazine stage 56 is placed in the forced mode.

In response to the magazine drive signal 80 there; the slide magazine motor drive amplifier 82 outputs an output signal 86 as a drive signal in accordance with the polarity

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to the slide magazine motor 88 either in forwards or forwards Reverse direction. Dcj. Slide magazine motor 88 is "operational with a suitable drive for a slide magazine _. Drive and turntable assembly 90 in corresponding Coupled forwards or backwards direction. :

The slide magazine drive and turntable assembly 90 has a circumferentially apertured ring,

.Q with an opening each with a corresponding slide magazine position corresponds, as illustrated in FIGS. 7 and 8 and as described below will. A slide magazine position sensing assembly 92 is located in the path of travel of the circumferentially encoded orifice ring

of the order 90. - .:

The slide magazine position sensing assembly 92 includes one Light source and two photodetectors, as can be seen in detail from FIGS. 2, 4, 5 and 6.

The two photodetectors are in a predetermined one Distance arranged along the circumferential path of the path of movement of the opening configuration, so that it has a differential Give an output scan of each of the openings, while each corresponding opening moves within the working range of the dual photodetectors. Depending on the direction of the slide magazine rotation, as the opening approaches the dual detector station, one of the photodetectors will light a higher intensity than the other photodetector. Furthermore, the opening is directly above the midpoint between the two Photodetectors, then both receive the same light intensity through the opening. The output signals on 94 · from the differential photodetectors of the scanning arrangement 22 are applied to slide magazine logic stage 56 for appropriate servo loop feedback control signals to generate for precise positioning deo

Slide magazine in a desired position.

In accordance with important aspects of the present invention As a result, the control device Ί0 works via the logical slide magazine stage 56 in a first forced operating mode in the magazine drive mode, during which the logical slide magazine stage by means of an output signal 80 the slide magazine motor 88 between one or more slide positions depending on the input signal 52 10

drives.

If the input signal 52 remains either at a high level Yorxrärts- or reverse signal state, then the

Slide magazine logic 56 in the forced mode for 15th

a quick search or a random access with movement of the slide magazine and the turntable between the current slide position and a desired slide position. If the control signal 52 is used for an increment around a single slide forward or backward

generated, then the forced operating mode by means of the logical slide magazine stage 56 and the signal 80 causes a Forced mode movement of slide magazine - control between current slide position and the next slide position.

The forced operating mode is terminated for the state of advancement by a single slide when the Slide magazine position sensing arrangement 52 by means of the output signals 94 · determines the next slide position. In response to the sampled state on signal 94- the logical slide magazine stage 56 ends the forced one Mode and then works in a servo mode under control of the output signals on 94 x from the double photodetectors to the slide magazine and the turntable 90 stop exactly at the next slide position.

The forced mode is similarly terminated and servo mode is activated during states passed from random access "and fast searching, when control signal 52 is terminated and after the next occurrence of signal 94 from the slide magazine position sensing arrangement 92.

The controller 10 also has a motion sensing stage 96 which responds to the slide magazine motor control voltage 86 responds and an output on 98 to the Logical slide magazine level 56 is created. The output signal on 98 indicates that the slide magazine is moving, stopped and in the desired slide magazine position in the servo mode is locked. The slide magazine

logic 56 is responsive to input signal 98 and generates an output signal on 8A- for the lifting logic 54, to put this in the switch-on mode, in which a downward positioning of the slide by the lifting mechanism 68 is possible to lift the slide

station into the projection position after the

Lower the magazine movement. Compartment infeed in this servo operating mode was also "the logical slide magazine stage 56 switched off or reset from the slide magazine operating mode.
25th

The logic slide magazine stage 56 gives a slide counter signal to 100 for use by the projector including the CPU controller 24 to display incremental slide position movement information to the controller 24

place. The incremental position signal 100 reaches the CPU control 24, since no absolute position information is available _{in the preferred exemplary embodiment of the magazine position scanning arrangement of the control device 10 oc.} Thus, in response to a known start position and the incremental position signals to 100, the CPU control 24 stores the instantaneous

borrowed position of the slide magazine.

The controller 10 also has a magazine drive motor strora sampling stage 102, which carries the stream through the diamond motor 88 monitors and a signal 104 in the event of excessive current to the logical slide magazine stage gives away. In response to the signal, this terminates the drive movement by terminating the magazine movement signal 80 »

It is now on Pig. 2 and the structure and detailed the function of the controller 10 of the present invention. The logical one

Forward / reverse stage 50 gives up when responding 15th

the input signals 12, 14 a forward mode signal 52a and a reverse mode signal 52b, where either the forward or the reverse signal is active depending on the state of the input signals 12, 14. As previously explained, in the preferred embodiment, which uses a CPU control 24, the signal 12 is not present. Like in Pig. 2 illustrates the logic lift stage 54 has a lift / reset gate stage 110, a lift driver hold stage

fe 12 and a lift / magazine lock stage 114. 25th

Similarly, slide magazine logic 56 has the

Fig. 1, as shown in FIG. 2 illustrates, lib a Magazinrichtungs- and mode control stage, a magazine drive mode selection holding circuit 120, a Maga _o _ zinrückstell gate circuit 122, and an opening midpoint detector stage 123- addition, matching elements of Fig. 1 and 2 are provided with the same reference numerals.

^ ₅ The Diaraagazin-Positionsabtastanordnung 52 comprises according to FIG. 2, a light source 124 in an appropriate positional relationship with the dual photodetectors 126, 128. A

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A partial view of the edge of the coded opening ring der TurntischanordTiu:; ,, 90 is in working position with the light source 124 and the two photo detectors 126, 128 shown. An opening 132 of the coded ring 135 is also seen in the aligned position with tig between photodetectors 126, 128, with the alignment of light source 124 in the rest servo mode position corresponds, in which the same exposure is received by both photodetectors 126, 128. The exit 94a of the photodetector 128 is connected across a series resistor in order to generate the output signal 95a for Forward drive signal 80a to magazine motor driver amplifier 82 to deliver. The output 94a is also direct to the opening midpoint detector stage 123 tied together. Similarly, output 94b is des Photodetector 126 passed through a series resistor, U3 the output signal 95b for the reverse drive signal To effect 80b. The output 94b is also directly connected to the opening center detector stage 123 ο - -

tied together.

The raise-ZRücks ^ ell gate stage 110 sets responding for an active signal on either the forward s-service line 52a or the reverse-service 25

line 52b over the boost driver hold circuit 112 Line 136 in the lift-on switch-on mode. Located the boost driver hold circuit 110 is in the boost turn-on mode, then a lift drive signal 138 is applied to hold circuit 112 through a lift / magazine lock gate 114 routed to drive the lift motor 60 to activate and a movement of the lifting motor 64 cause to slide a slide out of projection position to lift into the slide magazine position. The lifting / magazine locking stage 114 is represented in a particular embodiment by an AND gate, where

original

τ £ 5-

the signal 138 is at one input of the AND gate 114. The second input of this AND gate 114 is charged with the raising mode switch-on signal 84-, which is output from the magazine drive mode select hold circuit 120 of the slide magazine logic 56.

After the lift motor 64 is moved to lift the slide to a slide magazine position, an upper limit switch 140 of the lift position sensing assembly 70 is closed and outputs a signal on 72a to the lift switch anti-bounce stage 116 from. The lifting position. Probe arrangement 70 also has a lower limit sensing switch 142, which is closed when the lift motor 64 insert the slide lifting mechanism 68 into the lower

brings jection position, with a corresponding sub-limit signal transition 72b of the lift switch anti-bounce protection stage 116 is fed.

The lift switch anti-bounce level 116 is below

In response to the closing of either the switch as indicated by the corresponding input signal 72a, 72b 140 or 142 provide a switch transition output 144 to the raise / reset gate stage 110. These in response to the switch transition signal at 144, produces an output signal at 146 to the boost driver hold circuit 112 and turn off the lift drive signal 138, thereby terminating the slide lift mode. The lift switch anti-bounce protection level 116 also gives in response to the closing of the upper limit switch 140 (input 72a) a switch transition signal at output 148 to. the M --- ga ζ in drive mode selector / hold circuit 120 to put in the magazine drive mode.

The magazine drive mode selection hold circuit 120 generates in response to the signal at 148 the exit

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«= 26-

switch control signal 84 and also a magazine drive switch-on signal 150 for the magazine direction and operating control stage 118. When activated by the

Magazine drive signal 150 is the magazine direction 5

, depending on whether the forward mode signal 52a or the Rückwärtsbetriebsartnignal and mode control stage 118 J2B active dan appropriate corresponding forward drive signal 80a or the reverse drive signal 80b to the Magazinmotortreiberverntärker 82 off to the r-Iagazinmotor to excite 88 and to move the slide tray. The magazine driving clean switching signal 150 from the latch circuit 120 switches ^off the servo mode of Magazinrichtungs- and BetriebsarLsteuerstufe ·

The raise Z reset gate stage 110 outputs a signal 152 to maintain the forced operating mode to the magazine reset gate stage 122 in response to the active state of either the forward

or the reverse mode signal 52a or 52b. It reminds you that in a random access mode or a quick search mode, one of the corresponding Operating mode signals 52a or f> 2b remains active. On the other hand, the operating mode signal 52a or 52b remains in a state with a single slide active only for a relatively short time and inactive during the rest of the time, during which the Hagazintreiberhaiteschaltung 120 in the magazine driver

QQ is on mode. Thus, if the signal to maintain the forced mode is active, then the magazine direction mode control stage 118 continues to output either the forward drive signal 80a or the reverse drive signal 80b to the magazine isotor driver amplifier stage 82.

BATH ORIGINAL

It thus becomes the magazine direction and operating mode control stage 118 is controlled in a quick search or random access mode, then one of the appropriate drive signals 80a or 80b is active to start working of the slide magazine motor 88 to control the slide magazine drive and turntable 90 by a suitable Number of slide positions moved.

Is the desired slide position either when switching ports by a single slide position or when searching quickly or random access is achieved, then the respectively active driver signal 80a or 80b is terminated of the drive signal 150 ended. The drive signal 150

ends when the photodetectors 126, 128 accordingly 15th

the positioning of the aperture 132 near the probe assembly 92 according to the slide position shown become active so that light from the source 12V on the photodetectors 126, 128 falls. It gets electricity from the photodetectors 126, 128 by means of a common supply line 156 from the magazine reset gate stage 122 drawn.

The magazine drive motor current sensing stage 102 provides a control _{output at o 155.} This is applied to the supply line 156 in order to set the voltage level at in accordance with the frictional load on the magazine motor 88, as will be described in detail later in connection with FIG. The control output 155 provides a suitable delay in the transition from the forced mode to the servo mode under changing load conditions.

As soon as the photodetectors 126, 128, in response to light ^r / Ai from the source 124 through the opening 152, begin to flow, the Nagazin return-Gr-it at \ r. run 122 responding to the signal

BATH ORIGINAL

level at 156 a magazine driver Kücksteilsignal in off the riatüaainanto.iebsbebriebsarb-Außwahlhalteschal - "-?.? tung Λ reset and exit the signal 150.

Further, when the raise Z reset gate stage 110 is on continued signal for forced drive mode either on line 52a or 52 ° according to the fast search or random mode If access is detected, then signal 152 goes active to prevent the magazine reset gate stage 122 generates the reset signal 158.

This means that the situation of individual slide advancement is "C ic" , ~ or in the operating mode for random access or

XO.

quickly searching for the desired position and inakt-iv-'srder! of the signals 52a, 52b the signal for the activated operating mode 80a or 80b inactive and the servo operating mode signals 94a, 94b become active in order to to position the slide magazine precisely and to stop it in the desired aligned slide magazine position, in which the slide is aligned with the slide lifting mechanism 68 in the corresponding slide magazine position.

In the case of a single advance, the drive signal 150 is from the slide reset gate stage 122 as temporary servo mode lock signal used. In this way, the servo mode becomes temporary blocked for a predetermined time after the occurrence of the drive signal 150, as will be discussed later in connection is explained with FIG. 4.

If the slide drive flexure sensing stage 96 is the appropriate As a result of control voltage changes at the output 86 to the magazine motor 88, then the signal 98 to the lift-back :! Gate level 110 created. Under

BATH ORIGINAL

In response to the 'j8 signal, the raise / reset gate stage is 110 outputs a hold circuit enable signal 136 to activate the elevator drive hold circuit

to set in the lift mode. 5

When the elevator drive hold circuit 112 is in the elevator mode, it outputs the elevator enable signal 138 via the lift magazine interlock gate. 114 to operate the lift motor 64 with the slide lifting mechanism in the upper position and the slide in the lower position or projection position.

When the lower limit switch 14? through the slide 15

lifting mechanism 68 is actuated as soon as the slide is in the lower projection position, then the lift switch anti-bounce stage 116 is in response to the switching transition to 72b, the switch transition signal 144 to the raising-ZResetting-

gate stage 110, which in turn resets the lift drive hold circuit 112 via the output to end the lift operation. At this point in time, the stable, steady working state of the control device 10 is reached, the desired slide being in the projection position. The control device 10 now remains in this state until another slide advance control is received from the forward-y- reverse logic stage yj .

The magazine reset gate stage 122 outputs the dial count pulse signal to 100 for the CPU control (if that is in use) at a time when the power is down is detected by line 156 indicating that an opening is approaching.

BATH ORIGINAL

The opening center detector stage 123 generates when responding au! the photodetector output signals 94a, 94b at the output 157 a pulse control signal for the

Magazine reset gate stage 122. The pulse control signal-5

nal to 157 is through the magazine reset gate stage 122 under high frictional loading conditions of the magazine drive motor 88 is used to ensure that the servo mode is initiated and the forced mode Operating mode is terminated, as will be discussed later in the context is explained with FIG. 4.

It is now on FIg. 4, details of the particular embodiment of the controller 10 of FIGS. 1 and 2 for the projector of the preferred embodiment ^{employing the CF T} i controller 24 are provided. The signal path 26 carries the forward control signal 26a and the reverse control signal 26b. For the alternative embodiment of the projector, which does not use a CPU control 24-, the control signals at 14 include a forward increment control signal 14a and a reverse increment control signal 14b, which are generated by corresponding contacts of the control switch 16 of the Progector, which is connected to

2g equipped with a manual step mode control is. A common connection point of switch 16 is connected to ground potential at 160.

The forward control signal 14a or 26a is sent to the forward / backward / forward logic stage 50 via an input resistor fed to the base of an npn transistor 162. The collector of transistor 162 provides the forward control output 52a. The reverse control signal 14b or 26b is via a singing resistor applied to an npn transistor 164. The collector of transistor 164 is connected so that it

BATH ORIGINAL

-3i- "■ - *

-it-

then emits reverse controller output signal 52b.

In the alternative embodiment without a CPU control 24, the automatic data update signal 12 is from Digital filter 36 in accordance with the Pro grararnkas set enband advancement applied to the base of transistor 162.

The forward / reverse logic stage 50 has one Directional control circuit made by two NODER gates 166 and 168 formed with two inputs each will. D; -s forward control signal 52a is sent to the one Input of the NODER element 168 and the reverse control

ersign ^ I> 2b to one input of the NODER-Gli.ed.es 15 "

glued on. '. The output of the NODER-Gliecles 166 is with the zv-eiterj input of the NODER element 168 and the output of the ITODER element 168 is connected to the second input of the NODER element 166. The output signal of the NOR gate 166 forms the forward direction mode hold signal 170 and the output signal of the NODER element 168 forms the reverse direction mode hold signal 172. The stop direction signals 170 and are sent to the magazine motor direction and mode control stage 118 in place of the appropriate control signals 52a, 52b of FIG. 2 are applied.

The fiap ^ az-inrnotoiTichtungs- and operating mode control stage 118 has a first AND element 17 * + ait two inputs,

3Q where an input with the forward signal 170 and the second input with the magazine drive enable signal 150 from the Mngaainantriebshalteschaltunp; 120 loaded will. A second NUND link 176 ax two entrances receives the reverse operating mode signal at the first input 172 and at the second input the magazine An oX'iebne in switching signal 150. A servobel; i \ iebsart-Abschal ttrann i nlor 17o bor. there is an auxiliary line that

BAD OR1GIM ^AL

via an input resistor to the magazine drive switch-on signal 15 ° is charged. The collector of the Transistor 178 provides an output 180 as a servo drive shutdown control signal to the magazine motor drive 82. "The emitter of transistor 168 is with Connected to earth potential.

The forward and reverse control signals 52a and 52b each nn is an input of an OR gate 182 with two inputs of the lifting-Z-reset gate stage 110 placed. The output of the OR gate 182 is the signal 1 "> P for maintaining the forced Operation type from. The output signal of the OR gate

is connected via a capacitor 184 · to an input of a 15th

OR gate 186 created with two inputs. The starting point of the OR gate 186 is the lift hold enable signal 156 which is sent to the lift driver hold circuit 112 is applied. A resistor 188 is connected to Erdpobentinl and the connection point between .

the capacitor 184 and the first input of the OR gate 186 connected. The second input of the OR gate 186 is connected to ground potential via a resistor 190 connected. The second input of the OR gate 186 is also connected to the control output via a capacitor 192 98 of the magazine drive movement seam probe stage 96 tied together.

Two further OR gates 194 with two inputs of the _on raising-Z reset gate stage 110 have a first one

Input connected to the switch transition output signal of the lift switch anti-backlash stage 116 is. The second input of the OR gate 194- is over a series connection of a resistor 196 and one o- capacitor 198 with a + 12V supply line 200 tied together. The second entrance to the. OR gate 19 ^ is

BATH ORIGINAL

_χ -6ο-

also connected to ground potential through a resistor 202. The second input of the OR gate 194 is also via a diode from the cathode to the anode and

a resistor 206 to the output 76 of the Strombe-5

limit scanning stage 74 in connection.

The hold-on switch-on signal 136 is applied to the first Input of a NODER element 208 with two inputs of the lifting drive holding circuit 112 is applied. That The output signal of the NODER element 208 is at the input of a NODER element 210 with two inputs. The second input of the NOR gate 210 receives the lift stop reset signal 146. The output signal

of the NODER element 210 is connected to the second input of the 15th

NODER gate 208 is applied, creating a hold circuit arrangement the NODER link? 208, 210 results. The output signal of the NODER gate 210 is used as a raise switch-on signal 138 to the elevator magazine interlock gate 114 is applied as one input to a two-input AND gate 114. The second entrance of AND element 114 receives switch-on signal 84 from Ftagazinantriebshalteststufe 120.

_o _ The output signal of the lifting magazine locking gate 114 drives the elevating motor drive amplifier stage 60 via a connection through a series resistor to the inverting input of an operational amplifier stage 216. The output of the amplifier

₃ Q 216 is applied to a push-pull output stage with two transistors 218 and 220. The common emitter connection of transistors 213 and 2? 0 provides elevator drive output 62 to elevator motor 64. The other end 221 of the motor G4 is connected to the

3g non-inverting input of an amplifier 222 of the .otrombbegrenzungsabtasfcstufe 74 for the lifting actuator

BATH ORIGINAL

tie. Dap. The output signal of the lifting motor drive amplifier 216 is oυ the inverting input of the amplifier 216 via a resistor. 2.Z ¹ S-, A series circuit of two resistors 226 and 228 is connected via the resistor 224. The connection point of the resistors 226 and 228 is connected to ground potential via a brake control capacitor 250, the function of which will be explained in detail below. .

The lift switch bounce protection stage 116 has a holding circuit made up of two FUND gates 232 and 23 · + n is formed with two inputs each. A Input dos IiTOTD-GIi ed it 232 is with your upper limits-ο

switching signal input 72a of the upper limit switch 140 is connected. One input of the ROUND gate 234 receives the lower limit switch input signal 72b from the lower limit switch 142. The switch actuator 236 for switches 140 and 142 is activated by the slide lifting mechanism 68. The output of the NWD element 232 is connected to the second input of the FUND element 234 and the output of the NUFD element 234 is connected to the second input of the MJND element 232. The output of the ^D-T NUIs Giiedes 232 are connected via a capacitor 238, the OberschalteriJbergangssteuersignal 148. _o The control signal 148 is passed through a resistor 240 to ground potential. The upper switch transition signal output 148 is also connected to one of the inputs of an OR gate 242. The output of the OR gate 242 is connected to the switch transition control line 14 ^. The output of the NUND element 234 is connected to the second input of the OR element 242 via a capacitor 244. The second input of the OR gate 242 is also connected to ground potential via a resistor 246.

ΒΑΠ ORIGINAL

32A8538

The magazine output terminal gate stage 122 has a NODER gate 250 with two inputs, one of which with an initiation signal 197 from the lift reset gate stage 110 is loaded. The output of the WODER-GIicdes 250 is the diazo output signal 100. The output of the IiOT) ER-G Ii ed es 250 is also with the first input of a NODER gate 252 connected to two inputs. At the second input of the NODER link 252, the signal 152 is asserted to maintain the forced operating mode. At the output of the NODER link 252, the signal 158 is output via a series resistor. The second input of the NODER element 250 is via a capacitor 25 ^ to the output of a

Ooerations amplifier 258 connected. The second one-15

The output of the NODER element 250 is also connected to earth potential via a resistor 260.

The niclit inverting input of amplifier 258 is

assigned a reference voltage that is applied at connection point 20

second resistors 262 and 266 is generated. Resistor 266 is connected to the 12 volt supply and the resistor 262 connected to earth potential. The non-inverting input of amplifier 256 is also connected to the Output 157 of the opening midpoint detector 123 is turned on. Further, the non-inverting input of amplifier 253 receives a series connection Diode 261 - from the cathode to the anode - and a capacitor 263 the Mngazin driver signal 150. A resistor

3Q stand 265 is connected between ground potential and the connection point of the diode 261 and the capacitor 263. The inverting input of the amplifier 258 is connected to ^{the +12 volt supply via a resistor 26 z} l-. The inverting input of the amplifier 258 is also connected to the photodetector current source signal line 156 and the control output 155 of the signal transmission stage 102 .

BATH ORIGINAL

The magazine drive operating mode selection holding stage 120 has two NODER-Clieder 268 and 270, each with two inputs _r which are connected to a holding circuit. That. The OR element 268 receives two signals 104 and 158 at one input. The second input of the NOR element 268 is connected to the output of the NOR element 270. The output of the NODER element 268 is connected to an input of the NODER element 270. The second input of the iTODER element 270 is fed with the upper switch transition output signal 148. The magazine drive control switch-on signal 150, which is applied to the magazine motor direction and operating mode control stage 118, appears at the output of the NODER element 268. At the output of the NODER element 270, the lifting control signal Io

84 submitted.

The magazine motor drive stage 82 has an amplifier 274 with a non-inverting input that goes through a series resistor 276 with the forward drive signal 80a is fed, as well as an inverting input, the reverse drive signal via a series resistor 278 80b receives. The output of amplifier 274 is provided with a push-pull output stage Transistors 282 and 284 connected. The common emitter output of transistors 282 and 284 gives that Motor control signal 86 for the slide magazine motor 88. The feedback resistor 286 is between the output of amplifier 274 and the inverting input switched. Two resistors 288 and 290 are placed across resistor 286. A capacitor 292 lies between the connection point of the resistors and 290 and earth potential. The control output 95a of the Forward photodetector 128 is via the series connection of two diodes 294 and 296 - from anode to cathode switched - to the non-inverting input of the Amplifier 274 connected.

BATH ORIGINAL

Similarly, the control output is 95 * b of the Reverse PhotodeLector 126 via the series connection of two diodes 298 and 500 - connected with from anode to cathode connected to the inverting input of amplifier 274. D, - s servo blocking and switch-off signal 180 from the magazine motor direction and mode control stage 118 becomes the cathode of the two at the junction point Diodes 302 and 304 are applied. The anode of the diode 302 is connected to the reverse servo control signal 95h and the Anode of diode 304 with the forward servo control signal 95a occupied. A resistor 306 is connected between ground potential and the second end 307 of the magazine motor 88.

The Kotor circuit line 307 is also with the connection point two resistors 308 and 310 connected. That the other end of the resistor 310 is above a resistor 312 with the -12 volt supply line 314 in connection. The second end of resistor 308 is over

a resistor 316 to the +12 volt supply line 20th

turned on. Resistors 308, 310, 312 and 316 are in the current sensing path of the magazine motor current sensing stage 102 arranged. The connection point of resistors 308 and 316 is via a diode 318 - from anode to cathode -

to the non-inverting input of an amplifier 25

320 of the magazine motor current sensing stage 102 is connected. Of the Connection point of resistors 310 and 312 is above a diode 322 - from cathode to anode - at the inverting input of amplifier 320.

The output of the amplifier 320 is via a series resistor 323 to the emitter of an npn transistor 324 connected. At the collector of transistor 324, the control output signal 155 for the magazine reset gate stage 122 submitted. The emitter of transistor 324 is also grounded through a resistor

BAB ORIGfNAL

potentially connected. The base of the transistor 524 stands with the connection point of two resistors in connection, those in series between the +12 volt supply

and earth potential are connected. The outcome of the Verg

Amplifier 520 is also available with one end of a potentiometer 525 connected. The other end of the potentiometer 325 is at earth potential. A wiper of the potentiometer 525 is via two series resistors with one Buffer gate 326 connected. A capacitor is between the connection point of the two series resistors and earth potential. The output of the buffer gate gives via a diode 327 - from anode to cathode - that Overcurrent signal 104 from ...

The magazine drive movement sensing section 96 has one Holding circuitry provided by two NUHD gates 530 and 332 are formed with two inputs each. Of the The output of the KUND gate 530 is the lift adjustment input signal 98 from. The output of the NUND gate 552 is connected to one input of the NUND element 350. The output of the NUND gate 550 is also with an input of the NUND gate 552 in connection. The second NAND gate 332 receives the raise mode enable signal 84. The second input of the NUND gate 350 is also connected to the output via a resistor 534 of the amplifier 35 ^ connected. The second entrance of the MJND-GIiedes 330 is also available via a capacitor 338 in connection with earth potential. The non-inverting one

_{ΟΛ The input of amplifier 336 is supplied with the magazine motor drive signal 86} via a series connection of a diode 340 - from cathode to anode - and a resistor 542. Similarly, the inverting input of amplifier 536 is through diode 544 - from

₃ p. Anode to Cathode - connected to the junction of resistor 542 and diode 540.

BATH ORIGINAL

The opening center detector stage 123 has an amplifier 33 ^ i whose non-inverting input is connected to the photodetector output 94b via a series resistor and whose inverting input is connected to the photodetector output 94-a via a series resistor
is. The output of amplifier 33 " ¹ is connected via a series resistor 333 to the anode of a first diode 335 and to the cathode of a second diode 337. The cathode of diode 335 is connected to the inverting input of an amplifier 339. The anode of diode 33 ? is connected to the non-inverting input of the amplifier 339. The output of the amplifier 339 is connected to the control output 157 via a series connection of a capacitor 3 ^ 1 and a resistor 3 ^ 3.

The mode of operation of the control device 10 will now be discussed
4-, with additional reference being made to the timing waveforms of FIG. The loading

drive begins with the initiation of the slide advance control signal; for example, a forward stepping signal transition on the forward control line 26a from a high to a low value is used for this purpose. In response to the low value on line 26a, the
Transistor 162 will be off and the signal on 52a will be
a high transition signal.

For an individual slide advance, there is an at 52a

brief high transition signal. For the operational

types with quick searches and random access to movement of the slide magazine by a number of slide magazine positions, the signal at 52a is held at a high transition level for a period of time which is a desired one Number of slide positions corresponds to how they

is determined by the dial count signal 100.

ORIGIiMAL BATHROOM

In response to the high transition at 52a, the logic stage is set by logic gates 166 and 168 in the forward / backward logic stage 50 formed holding circuit held in the forward mode, with the output 170 a high level occurs. Furthermore, the high transition signal at 52a via the logic element 182 of the lift-off setting reset gate stage 110 and via the Capacitor 184 delivered, the logic element 186 a high transition pulse to the logic element 208 and the elevator drive hold circuit 112 sets. Consequently the lift drive hold circuit 208 becomes the lift hold estatus set, with a high output signal occurring at 138 at logic element 210, which is sent to the logic element 114 of the lift magazine lock stage

114 is applied. This will boost the lift motor driver level 60 is activated to control the operation of the slide lift actuator 64, removing a slide from the Projection position in the upper slide magazine position

is raised.
20th

As soon as the slide lifting mechanism 68 the pre-determined Reached the upper limit position, the upper limit switch 140 is actuated and on to a low value

outgoing transition signal is transmitted on line 72a to the 25th

Link 232 of the lift switch anti-backlash stage 116 laid. The transition on line 72a is effected by the holding arrangement of logic gates 232 and 234 held and an impulse signal at output 148

delivered via capacitor 238. A pulse signal becomes 30

also via the OR gate 242 to the common switch junction output line 144 laid. A pulse on the signal line 144 runs through the logic element 144 to reset the elevator drive hold circuit 208 and thus the slide elevator motor 64 to operate if

via the lift magazine locking gate 114 of the

End lift motor driver amplifier 60.

The pulse on signal line 148 is sent to the logic element 270 of the magazine driver holding level 120 5

placed, placing the hold circuit in the magazine drive mode is set and a high output signal occurs at control signal output 1 $ 0. There at the AND element 174 of the magazine motor direction and operating mode control stage 118 two high signals are present, the AND gate 174 is switched through and inputs at 80a Forward magazine drive control signal to magazine motor driver amplifiers stage 82. Thus becomes the slide magazine motor 88 excites and moves the slide magazine out

one position to the next. 15th

In the case of an individual slide advance control signal that is fed to the forward-Z-reverse logic stage 50 is, the forced mode maintain signal 152 is low at this point Value. As soon as the photodetectors 126 and 128 approach the opening 132 for alignment with the Detector station of source 124 and photodetectors 126, 128 begin to conduct, current is passed through the resistor 264 is sensed by the amplifier 258, whereby a pulse signal is transmitted through the logic element 250 results, which represents a negative transition signal at the input of the logic element 252. At the output of the logic element 252 results

₃ q there is a positive going pulse-shaped transition signal which is applied to the logic element 268 of the magazine driver holding circuit, whereby this holding circuit is reset and the driver signal is terminated at 150 for the forced operating mode.

3g The transition time from the forced operating mode to the Servo operating mode, taking into account the opening orientation relative to the photodetectors on the de-

BATH ORIGINAL

Tektorstation is changed by the control device 10 as a puncture of the Reibungrbalastung of the magazine drive, as will be described in detail below. Thus, the forward drive signal 170 from the forward / backward logic stage 50 is prevented from running through the logic element 174 zxx, since its second input at 150 is at a low level.

The operation of the control device 10 ends

this point in time the forced operating mode and changes to the servo operating mode under the control of the photodetectors 126 and 128. Thus, the magazine drive amplifier 274 is controlled in accordance with the servo 15

Feedback signals 95a and 95b from photodetectors 126 and 128. Will the magazine in the forward direction moves, then aperture 152 approaches first the forward detector 128 so that this forward photodetector 128 first begins to conduct. While the public

voltage 132 runs through the center of the detector station measured by the ones drawn between the center of source 124 and the center of photodetectors 126 and 128 Line, then both photodetectors 126, 128 conduct approximately the same. Since the magazine has the tendency to over The reverse photodetector begins to overshoot the center-aligned position of the opening at the detector station 126 to conduct with a higher value than the forward photodetector 128, since the opening directed more to the reverse photodetector 126 and a greater amount of light is directed from source 124 to reverse photodetector 126.

Thus, the differential output signals control the Photodetectors 126 and 128 at 94b and 94-a respectively work in a closed loop to the amplifier 274 and energize motor 88. Directs the

Backward photodetector 126 more, then the polarity of the driver output signal of the amplifier 274 at 86 will reverse the motor direction by means of the signal 24b. The magazine is thus stopped at a position _t in which the aperture is aligned with the detector 132 station and the slide is aligned with the Diaanhebemechanismus 68; the center of the opening 32 is then aligned with that between the center of the photodetectors 126, 128 and the center of FIG

Source 124 drawn line, the magazine movement is from the amplifier 336 of the magazine drive motion sensing stage 96 is sensed in response to the servo mode voltages at output 86 to motor 88.

In response to the control pulses at the output of the Amplifier 336 integrates the integrator formed by resistor 334 and capacitor 338 Output signal of amplifier 336 in order to increase the output of the To set logic elements 330 and 332 formed holding circuit and a positive going transition signal to give up on 98. The positive going transition on 98 is identified via capacitor 192 as a positive going Pulse signal via logic element 186 is again used to set lifting drive hold circuit 112.

Thus, the boost power-on hold signal results in 138 together with the high on the lift enable line 84, a high output on the lift magazine interlock gate 140 to operate the slide lifting motor 64, whereupon the slide lifting mechanism 68 the one aligned with the slide change projection station Slide down from the magazine position to the projection position to convict.

When moving the slide through the slide lifting mechanism The lower limit switch is in the projection position 142 actuated so that a low transition occurs on the signal line 72b to the logic element 234 results. This inverts the negative going transition signal into a positive going at its output. Of the positive transition at the output of the logic element 234 causes the generation of a pulse that the input of the logic element 242 via the capacitor 244 is fed. The positive going pulse aia the output of the logic element 242 on the switch transition signal line 144 becomes the lift setting reset gate stage 110 via logic element 194

to the return line 146 of the lifting drive hold-15

circuit 112 to switch back to the lift shutdown mode fed.

The operation of the slide lifting motor 64 is thus terminated with the slide in the lower projection position. The control device 10 now assumes a stable operating mode in the rest position and waits for the next command for a slide advance or downshift for individual conveyance or for a command _o _ either in the operating mode for quick search or for

random access.

When the slide is advanced, the signal at 52a is on brief high transition * Accordingly, signal 152 for the forced operating mode is also on

brief signal. So it is at the time of transition at the end of the slide lifting mode to return the slide from the projection position to the top into the slide magazine position and before the forced operating mode of slide movement is initiated, to temporarily block the servo operating mode. An over-

BATHROOM ORIGINAL

When switching to servo mode at this point in time, the magazine would be in the current slide magazine position keep.

For this reason and during the transition from the slide lifting mode to the limited magazine drive mode the magazine output driver signal 150 is obtained from the Magazine driver circuit 120 across capacitor 263

and the diode 261 as a temporary lock servo controller-10

signal to the non-inverting reference input of the

Amplifier 258 applied. The temporarily high level on non-inverting input of amplifier 258 guaranteed is a steady state output of amplifier 258. Thus, amplifier 258 is transient 15th

versus responding to any changes Blocked in the signal level at the inverting input, the interference signals or changes in the from the photodetector drawn current may result when the magazine begins to move in the forced mode. After the magazine movement has started and the previously aligned opening moves away from the neighborhood As the photodetectors move, the temporary blocking signal is no longer required and it becomes the normal one Circuit operation as previously described resumed.

Consider now the situation where there is a continuous high signal on any one of the inputs 14a, 14b, 26a or 26b for either a fast seek or random access mode for more than one slide position movement. The continuously high signal at 52a or 52b causes a continuous signal at 152 via logic element 182 to maintain the forced operating mode. The high signal on 152 is a "A linkage

BATH ORIGINAL

- 93-.

element 252 that does not respond to the pulse signal at the output of the linkage gi5 ^ οs 250, which is from the amplifier due to the conduction of the photodetectors, not on, while the magazine closed the openings of one slide position to the other on the photodetectors passes by. Thus the negative going transition also runs does not remain through logic element 252 and the output signal at 158 to logic element 268 at a low value.

Thus the magazine drive and mode selection circuit remains 120 in the forced magazine drive mode, with the signal 150 being delivered continuously as long as either of the drive signals 52a or 52b remains high. The high magazine drive signal 150 inhibits the servo mode signals from the Photo detectors in magazine motor drive stage 82 via transistor 178.

Thus \ v-ird in random access mode

or quickly looking to perform the lifting sequence to lift the slide from the projection position in the slide magazine position rotated the slide magazine to the desired slide position before the drive signals 52a 25th

or 52b are finished and before the servo mode starts to stop the magazine exactly in the desired position.

It is now the operation of the control device to 30th

Varying the transition point from the forced mode to the servo mode as a puncture of the magazine drive friction load to be discribed. The control output 155 of the magazine motor drive current sensing

stage 102 sends a varying reference signal to the in-35

vertical input of amplifier 258 eier magazine

BATH ORIGINAL

reset gate stage 122 as a function of the sampled Current of flagazin drive motor 88.

When the current of the magazine drive motor increases, the amplifier 320 and the transistor 324 cause a Vary the current through resistor 264 so that there is a rising voltage at the inverting input of amplifier 258 results. Thus, the higher the frictional load on the magazine drive motor 88, the higher it is the reference level at the inverting input of amplifier 258.

The time of transition from the forced operating mode

The servo mode is defined by the Ab-15

the voltage level at the inverting input of amplifier 258 drops below a fixed reference level at the non-inverting one Entry.

If there is only a slight frictional load (Fig. 15),

then the control signal at 155 is practically ineffective and the transition point to servo mode becomes practical, determined by the current flowing through resistor 264 to photodetectors 126, 128 via line 156. Thus, when the opening approaches the first photodetector and it begins to conduct, the transition occurs from forced mode to servo mode on before opening the aligned position reached centrally between the photodetectors 126, 128.

3Q This is in low friction situations Desirable because the magazine tends to swing past the aligned center position and the driving forces in servo mode are sufficient to move the slide magazine beyond the transition position steer.

BATH ORIGINAL

In the case of a higher exercise load, the tTber gangszeitpunlct from the forced to the servo operating mode closer to the centrally aligned opening position

between the photodetectors at the detector station lie-5

"gen because the inertia of the magazine at high friction might not be large enough to accommodate slower drive conditions that the magazine could handle earlier transition position away to center position ... ". Furthermore, in some cases, extremely higher 10

Frictional load does not affect the servo drive forces alone sufficient to bring the magazine into the aligned center position Bring SU. This situation arises when deforms the slide magazine; is.

Thus increased in situations with high frictional loads control signal 155 is the normal bias level at inverting input of amplifier 258 »so that a larger stroa of a photodetector is required,

to keep the signal at the inverting input below that 20th

of the non-inverting input. This results in a transition from the forced mode in the servo mode corresponding to a diamond position in which the opening is closer to the central aligned position at the detector station.

To make the transition from the forced operating mode to the To ensure servo mode in situations with extremely high frictional loads on the magazine drive motor 88 (Fig. 16), the control output 157 of the Opening center detector 123 in the center aligned opening position and applies an increased level to the non-inverting input of the Amplifier 258 at the time of opening center alignment. In the case of high frictional loads, this ensures that the level at the inverting input is below the .The reference level at the non-inverting input is around

the transition from the forced operating mode to the To achieve servo mode. The control output signal Of course, 157 is only extreme in situations

high frictional load on the slide magazine drive motor er-5

conducive.

The operation of the magazine motor drive 82 and in particular the electronic braking effect will now be considered. which is carried out during the forced operating mode. When the amplifier 274 has a drive signal is applied to push-pull transistors 282, 284 to provide the motor drive signal to 86, the capacitor 292 suitably loaded in the feedback circuit of the amplifier. For example, if the controller sets the magazine motor drive stage 82 in the forced forward drive mode, the Capacitor 292 is positively charged to a level that is determined by the output driver control voltage of amplifier 2-4 depends.

V / hen the forced operation and the servo mode are ended is received, then the forced mode forward drive signal 80a is withdrawn and the servo feedback signals 95a,

control the servo mode operation of the amplifier 274 for controlling the operation of the engine 88. According to When the forced mode of operation is terminated, the charge stored in capacitor 292 forms a burn signal for

_on the inverting input of the amplifier 274 to output a control voltage at the output of the amplifier 274 for a braking operation of the motor 88, wherein a braking voltage is applied which is opposite in sign to that of the control voltage during the forced operation.

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After termination of the forced forward operating mode, for example o: "r: G negative control voltage am Output of amplifier 274- delivered and the push-pull transistors 282, 284- give a signal to 86 to Engine 88 off.

Depending on the dynamic operating parameters of the motor 88, the braking effect increases proportionally the speed of the motor and decreases proportionally with the load on the motor. This is achieved with response on the drive voltage level at 86 and the RC time constant determined by resistor 290 and the Capacitor 292 is created. For example, if the motor is heavily loaded, the control voltage 26 will tend to drop and the load will also drop at capacitor 292. If the engine works .with high Speeds in response to a control voltage on 86 for a relatively long time in the

Operating mode for quick search or random access, 20th

then capacitor 292 receives a higher charge and can therefore also achieve a higher braking effect.

Furthermore, the capacitor 292 stores in the forced

Reverse mode a negative voltage to apply 25th

to amplifier 274- by applying a forward drive signal to the output of amplifier 274- a Bring about braking effect. Similarly, lift motor driver 60 provides electronic braking of the slide lifting motor 64 by means of the capacitor 23Q.

Reference is now made to FIG. 3 and the specific Embodiment of the digital filter 36 of FIG. 1 considered, which is used in the alternative embodiment without the CPU controller 24-. The digital filter 36 responds to the 1 kHz sinusoidal signal and on encoded tape advancement signals at audio input 38,

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to generate the increment control signal 12. At a special arrangement, which is compatible with recognized standards, the coded progressive currents

as 1000 Hz signals of a predetermined length of time on the Pro-5

gram cartridge tape 44 recorded with a power surge is recorded where a slide advance is desired while the program tape is running.

A balanced preamplifier stage 350 amplifies this Input signal from the magnetic head 40 and outputs the output signal $ 52 to the digital filter as already discussed.

The digital filter 36 has a level comparator stage 15th

354, one input of which is connected to output 38 of the balanced Preamplifier stage 350 is connected. The level comparator stage 35 ^ - gives an output at 356 off when the signal at 38 has a predetermined peak amplitude exceeds. The output signal 356 of the level comparator stage 354 is sent to a logic interface stage 358 applied, which at 360 an output signal as a negative-going logic level pulse with response generated upon each positive crossing of the signal at 356.

A charge pump stage 362 of the digital filter 36 has a reset input 364 to which an output signal of the limit gate stage 366 is fed. the Charge pump stage 362 also has trigger inputs 368 and 370. Charge pump stage 362 has an output 372, whose signal for driving an integrator-Zcomparator stage 374 serves. The output of the integrator / comparator stage 374 emits the increment control signal 12.

The output signal at 372 of the charge pulse stage 362 is averaged by the integrator comparator stage 374, pre-

at signal frequencies in the pass band of the digital filter 56 cause a level high enough to trigger the integrator / correlator stage 574. The output signal 12 usually has a value close to +12 volt supply voltage and drops to a level near the -12 volt supply voltage when the integrator / Kornparat or stage 574- is triggered. An inverter stage 576 gives trigger signals 568, 570 with response

on the trigger input signal 578 of the limiter gate 10

grade 266.

The limiting gate stage 566 also provides a trigger output signal 580 in response to negative going signals 3U3 ″ at input 560 to the limiter gate stage 566 from. The trigger signal 580 is applied to a monostable delay stage 582 as a trigger input. When triggered, it produces an output at 33 ^ i with a period equal to the period the upper frequency limit of the passband of the encoded Sound current surge is. The output signal 58A- the monostable Delay stage 582 is applied to a morsostable window stage 586 as a trigger input signal. This is indicated by the falling edge of the output signal

"_ Nals 584 of the monostable delay stage 582 triggered and has time-dependent switchable control outputs 588, 590 for controlling the limit gate stage 566. The Honostable Window Step 586 also has one Jerk bell input 592, which is connected to the trigger output 578 of the Limiter gate stage 566 connected via a capacitor 594 is.

During the switch-on period of the monostable window stage 586, a NODER element 596 becomes the limiter gate stage 566 switched via the control line 588. So if the input signal to 560 is during this switch-on.

period is directed negatively, an impulse is generated by the NODER element 396 to the trigger inputs 368, 370 of the charge pump stage 362 run via the inverter stage 376.

In this manner, the charge pumping stage 362 is turned on again

triggers.

If the signal at 360 is of a different frequency, then the section that goes into the negative becomes:

of the signal generated pulse by a second gate 3 ^ 8 10

the limit gate stage 366 is turned on and on the reset input 364 of the charge pump stage 362 is set, so that this is reset.

The equalization preamplifier stage 350 has one 15th

Surge suppression switch assembly 400. The surge suppression switch 400 is shown in Figure 3 and places the amplified signal at 38 in the equalizer preamplifier stage 350 to output 38 · For processing through the level comparator stage 354 of the digital

valley filter 36 separates in a second working position the surge suppression circuitry 400 applies signal 352 to output 38 so that the digital filter is switched off. The surge suppression switch

arrangement is used in a situation where the 25th

Projector should not respond to encoded power surge signals on ■ tape 44. With a projector that has a Using GPU controller 24, the power surge suppression circuit is used 400 in the second position also serves to transmit the input signal 25a to the CPU controller 24 by disconnecting the signal 352 from the output 25a .

An additional signal input 402 is provided at the output 352 _{S5 of} the equalization preamplifier stage 350 in order to receive an incremental signal 12 from the digital filter 36

Slide progression during the generation of program progression signals to be recorded when a program tape 44 in a projector without CPU control 24 is recorded-Soinit the circuit of the projector, not shown, for coding current surge signals is used to input signals at 402 to generate the increment signal 12 by means of the digital filter 36 and the slide magazine during the operation of the control device 10

to advance while recording the program. One under-10

press signal 403 for switching off an FET gate 405

the preamplifier stage 350 is provided during the encoding of burst signals in order to switch off the output signal of the preamplifier stage 350 at 352.
15th

Reference is now made to Figures 5, 6, 7 and 8, the slide magazine drive and turntable assembly 90 and the magazine position sensing assembly 92 in cooperation illustrated. The turntable 412 carries a circumferentially encoded opening ring 130 which is more individual is shown in Figs. The slide magazine position sensing arrangement 92 is slidably supported by the housing 414 of the projector. The turntable 412 is on the housing 414 for rotational movement relative to the latter 25th

supported. A toothed ring 4-16 is integral with the turntable 412 is provided for engagement with a gearwheel, not shown, which is driven by the slide magazine motor 88 will. A slide magazine 410 is placed on the projector and has an alignment groove 417 (Fig. 6), which in a outer flange 418 is formed. The alignment groove 417 fits to a cooperating nose 419 of the rotary table 412 for rotating the slide magazine 410 by the rotary table 412 and ensures the correct alignment of the slide magazine position to the turntable. Since the turntable 412 and the magazine position tab arrangement 92 only step-by-step

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_λ , sz -

wise slide position information is a zero position information output, an ITull position alignment switch (not shown) is adjacent to one

Operating portion of the turntable 412 provided to 5

the absolute zero start position information to the control device and release the CPU control 24.

The turntable 412 with the opening ring 130 attached forms a circumferential gap, i.e. an annular recess 420 (Figure 8). The position sensing assembly 92 has a light pipe 422 (FIGS. 5 and 6) with the light source 12 ^ cooperates and turns into the ring-shaped Recess 420 extends to receive light from source 124

to direct the opening ring 130. The photodetectors 126, 15th

128 are in the position sensing arrangement 92 in a common T) controller module 424 immediately below the opening ring 130 housed.

The opening ring I30 has a first circumferential shape Order 426 and openings 132 with 81 openings in are arranged at the same distance and correspond to the 81 positions of an 80 slide magazine 410. The opening ring also has a second circumferential array 428 of FIG Apertures 132 with 141 suitably and evenly spaced Openings corresponding to the 141 positions of a 140 slide magazine 430 (FIG. 9). Is that 80 slide magazine 410 in the position shown in FIGS. 5 and 6, then is the first array 426 of openings 132 aligned directly over the photodetectors 126, 128 as the slide magazine 410 and turntable 412 rotate.

In a particular embodiment, the photodetectors 126, 128 represented by chips from

1.2? · 4.19mm, the 4.19 dimension being along the circumferential path of travel of aperture assembly 426 is located. That

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Detector module 424 provides a 0.51 gap between adjacent chips. The openings 132 have dimensions of 1.78-1.78 mm, formed in an opening ring 130 made of stainless steel.
5

Fig. 9 shows that the commercially available 140-slide magazine 430 usually a downwardly extending one Has portion 432 which is formed as part of a magazine release mechanism. The movable scanning arrangement 92 includes a spring biased cam actuator 434 supported by the foregoing Section 432 is actuated. Upon downward movement of the ceiling actuator 434, which is triggered by the protruding portion 432 is operated. With downward.

Movement of the cam actuator 434 moves the Cam actuator turns a curve 436 through a spring biased plate 438 which is the light source 124, the detector module 424 and the light pipe 422 of the position sensing assembly 92 carries. The moving plate 438 is described in response to the operation of the cam actuator 434 by the paragraph above 432 in FIG. 9 to the right into the 140 slide magazine scanning position brought.

The position sensing assembly 92 aligns in the 140 slide magazine scan position 9 the photodetectors 126, 128 exactly with the movement path of the opening arrangement 428 the end. Thus, the photodetectors 126, 128 are positioned appropriately to communicate with the openings 132 of the 141 opening array 428 and provide feedback signals to the controller 10 for a 140-slide magazine position sensing and to provide servo controls as previously described.

The movable plate 438 of the position scanning assembly is normally opposite the BO slide magazine scanning position

tion pretensioned by means of a spring 440 which, between a hook 442 of the plate 458 and a hook 444 of a U-shaped channel housing extending generally

at 446, 448 and in the housing 414 un-5

is accommodated. The plate 438 is slidable for movement within the U-shaped channel housing 446, 448. The cam actuator 434 is provided with an opening to receive the cam 436 of the plate 438. The lower portion of the N-crank actuator 434 has a protruding hook 450. A spring 452 extends between the hook 450 and a protruding hook 454 of the U-shaped channel housing 446, 448 to bias cam actuator 434 in the upward position. The cam actuating device 434 is slidably displaceable in the U-shaped channel housing 446, 448 between an upper and lower position according to FIGS. 6 and 9 within the channel formed by the housing parts 456, 458.

A switch contact arrangement 460 provides an electrical Connection to the control device 10 is established when the slide magazine position probe arrangement is in the 140 slide magazine position is located and interrupts the circuit,

when the scanning arrangement is in the 80-slide magazine position 25

tion is located. The switch contact assembly 460 has a first fixed contact 462 of a lower Housing part 458 is carried. A movable spring contact arm 464 is on the movable platform 438 appropriate. The spring contact arm 464 serves to come into contact with the fixed contact 462 when the platform 438 is moved to the 140 slide magazine position (Fig. 9) - The fixed contact arm 462 and the spring contact arm 464 are connected to output signal connections 466 and 468, respectively, at 565 to the CPU controller 24.

The slide magazine position sensing assembly 92 of another The arrangement not shown has a single photo ■ detector and two alternately excited light sources.

Another alternative arrangement, not shown, of the movable Scanning assembly 92 is controlled by a switch which is operated by the user to activate either the 80 slide magazine operation or the 140 slide magazine operation to select. The scanning assembly 92 under control of the The switch is then activated by a suitable actuator moved about by an electromagnet.

In another arrangement, not shown, there are two Detector assemblies are provided which are aligned with one or the other aperture assembly 426, 428. the 80-Diamgazinoperation is thus made using the output signals the detector assembly aligned with the 80 slide position aperture assembly 426 and the 140 slide magazine operation using the outputs of the 428 aligned with the 140 slide magazine opening assembly Detector arrangement carried out. The right detector arrangement is selected by a suitable switch arrangement. The switch arrangement is controlled by a user operated switches for either 80 slide magazine or 140 slide magazine operation. It can either the outputs of the detector assemblies or the energy inputs to the detector assemblies at different specific training courses.

It is now the coding and decoding of slide address signals by the CPU control in detail with reference to FIG. 11. The coded Slide address signals each consist of burst format sequences of electronic pulses with predetermined ones Periods and pulse widths in a predetermined coding

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format. The encoded slide address signals are recorded as a data word in the power burst format by the pulse width modulation coding technique shown. A typical encoded signal as shown in FIG. 11 is defined by a current impulse format, which has one after the other 180 1'actirnpulse followed by a 1 ms period 500 by two zero pulses 502 followed by eight data bits as a data word 504-, followed by two zero pulses 506, followed by 255 clock pulses 508.

In a preferred embodiment, the total period of a clock pulse is nominally 1000 ps with one Tables range from 900 to 1100 us. For a zero pulse

,, - the IV period is nominally 1500 us with a range of 1350 to 1700 us. The eight data bits in the data word part 50 '+ - include predetermined combinations of zero pulses and 1 pulses. For a 1-pulse the period is nominally 750 us with a range of 650 to 850 ps.

2Q The 1 level or high level (approximately 5 volts) of each of the Pulses in the burst format are always nominally 500 µs.

The data word portion 504 of each surge format represents a digital slide address coding of eight data bits in one binary coded format. Since 14 0-slide positions in the The largest magazine size possible for slide projectors are binary numbers in the preferred embodiment or coded data words corresponding to zero to 140 and decoded to the corresponding 140 slide positions to represent. The surge format section 504 of Fig. 11 illustrates the binary number or that, for example Data word 01100111 according to disposition 103. Da eight dnbenbits are required for 140 slide positions represent and an 8-bit binary, ahl 256 different Combinations are also data bits

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available for other tax information, such as Operating and "function ^ ο innovation of the slide projector used in addition to the slide address identifications

v / earth.
5

To record a program cartridge tape 44- generated the CPU controller 24 appropriate burst formats with appropriate Address signals and applies them to the magnetic head along with a bias oscillator signal 40 to suitably set the desired surge formats to be recorded on the tape 44 defining a program tape. To the encoded slide address signals and record the burst formats, the

Slide projector set to recording mode 15

by inputting a corresponding recording enable signal via the keypad 28. "This can be, for example, a code 215 followed by the actuation the "EXECUTE" button.

The playback control of the cassette tape controller 42 is then operated. At this point, a user can record corresponding surge formats by pressing the corresponding keys on keypad 28, which define the valid slide position numbers. After each

If a complete slide address has been entered, which includes, for example, one to three digits, the user operates the record Z backward key. That way you can appropriate impulse formats that correspond to the appropriate

_on include data words according to the slide positions, on one

Program tape can be recorded with random access. For example, a typical random access program may be Slide position address numbers 1, 2, 10, 50, 75 »52 and 5, all slide position addresses as a separate burst format is encoded on the program tape.

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The CPU controller 24 also enables a recorded program cartridge tape 44 to be decoded by decoding the power burst format signals and the data words ⁴ in the power burst format sections 504 in order to appropriately control the device 10 to move the slide magazine turntable 90 into the appropriate slide positions in accordance with the synchronized Language track of tape program 44 brings. It should be noted that the CPU controller 24 decodes recorded tape programs regardless of

whether the program tape by means of the keypad 28 of the slide projector or recorded by means of a coding circuit which is separate and independent of the slide projector for recording corresponding impulse format signals with coded slide address signals according to Fig. 11

is arranged.

Let us now consider the mode of operation of the CPU control in detail 24 for encoding, recording and decoding of Impulse format signals for optional operation of the slide projector, with reference to Figures 12, 13 and 14 are referred to. The coding of the burst format signals is intended in conjunction with the flowchart of Figure 12 and the decoding of the burst format signals in connection with the flow chart of FIG will. Figure 14 illustrates a preferred embodiment of the CPU controller 24 and its associated control circuit connected to the keypad 28.

14, the CPU controller 24 is implemented by

a 3870 microprocessor chip, such as those supplied by Mostek or Fairchild. The keypad is scanned for input in accordance with monitoring input ^ c ₃ and output lines of the microprocessor 24, which are generally designated by the 512th

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The data input signal 25a from the audio input 58 of the pickup head " ⁿ " is applied to the data input 514 of the microprocessor via the input circuit 5 ^ ε.

The input circuit 516 generates a square wave signal at 5

514 and 528 from the continuously sinusoidal audio input at 25a from the tape magnetic head AO. The microprocessor 24 give ι; a data output signal 25b to the tape magnetic head 40 via a conventional recording circuit (not shown). the cassette assembly of FIG. A suitable usual Playback and record audio amplifier circuitry is in the cassette tape assembly between the magnetic head 40 and the data lines 25a, 25b are provided.

The microprocessor 24 outputs a forwards / backwards at 518

wärtssignal and at 519 a GO signal, which has a Output control circuit 520 the forward logic output signal 14a and the reverse logic output signal 14b represent. The GO signal 519 is applied to the first input each of two AND gates 521 and 525 are applied. The forward 5 / reverse signal 5 ^ 8 is on the second Input of the AND gate 521 and connected via an inverter 525 to the second input of the AND gate 525,

The data input 514 has one input of an AND gate 522 connected to two inputs. The second input of AND gate 522 is to a data input blocking line 524 from the microprocessor 24 connected- The output of the AND gate 522 is at an external interrupt data input 528 of microprocessor 24.

The projector of the present invention has at A preferred embodiment generally designated 550 Advertisement. The display comprises three separate display digits, which reproduce the hundreds, tens and ones, with each display digit from a seven-segment arrangement is formed. The microprocessor 24

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controls the display .550 to find the slide address positions and to show other functional status displays. For example, if slides in random access using the keypad 28 are selected, then the display 530 shows represents the currently selected and projected slide. With a multiple mode of operation from a program tape 44 will also be the number of the decoded slide after decoding displayed. During the coding of a program tape 44, the numbers of those encoded on the program tape and slides displayed by the projector.

The microprocessor 24 provides BCD display driver output signals 532, 534, 536 and 538 to a decoder drive.

Above level 540 from. The decoder driver stage 540 generates Segment driver output signals are generally referred to as 542 on a segment driver output line to each of the seven segments of each display digit. The microprocessor

24 controls the three display digits in the time division multiplexer 20

travel. Each of the display segments also has a decimal point display element, which is used to indicate the idle mode of the tape device. The decimal points will be controlled via an output line 544, which is connected to a

Transistor stage 546 is connected to that of the pause-off-25

output signal 548 of the microprocessor 2 ^ is driven.

The pause output signal 548 is also provided via a pause output control circuit 550 to a psuja output control line 552, which is associated with the cassette tape controller 42 for controlling the pause mode of the tape 44 according to FIG the timing signals of the microprocessor 24 is connected.

To sense the playback status of the cassette controller 42, the microprocessor 24 has a playback input 556 at the output of a NUND-OIiedes 555 with two

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-64-

Entrances. A first input 554 of the NUIID element 555 is via a resistor element with a motor sampling input 557 connected. The motor abrading input 557 leads a high signal when the cartridge drive motor is operating. The second input 568 of the NUND gate 555 is over a Trarisistor inverter 572 is connected to an attenuation input 570. At the damping input 570 there is a low value Signal when the cassette audio circuit is working and a high signal when the audio part is muted or attenuated is.

The playback input signal 556 can thus be transmitted to the microprocessor 2A indicate whether the cassette controller 42 and

so that the 2fassettenbandeinhe.it is in the playback floor 15

drive mode is located. The microprocessor uses the playback input signal 556? to switch off the keypad 28, while the cartridge program tape 44 is being played and also to determine that the cartridge is prior to recording of coded burst format signals when recording a tape program is ready for operation *

An 80/140 switch input signal 558 is provided to the microprocessor 24 fed from the slide magazine position switch 460 of the slide magazine position sensing assembly 92 to the Microprocessor 24 indicate whether an 80-position slide magazine or a 140-slide slide magazine is inserted in the projector is. A slide zero position switch input signal 560 indicates to microprocessor 24 that the slide magazine

Q ₀ and the turntable are in the zero or rest position, since no absolute position information is output from the magazine position scanning arrangement 92. The dial input signal 100 from the control device 10 is fed to the microprocessor 24 at the counter input 562 via a form inverter. A movement input 564 is connected to the movement path input 566 of the Milcro-

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Processor 24 connected * A signal at the movement input 564 can be emitted in a suitable manner by the control device at the output 98 of the movement sensing stage 96,
b

The microprocessor 24 generates a high level signal on a record enable output 574 _? if the correct recording mode entries have been made via the keypad 28 (e.g. 213), the "Execute" key has been pressed and the playback control of the cassette tape recorder has been activated low level. The recording enable output signal 574 is via

an inverter 575 and a transistor stage 576 to a Record bias oscillator turn-on line placed with the cassette tape unit; connected is, including activating the bias oscillator.

The microprocessor controls when the device is switched on

the slide magazine turntable 90, so that the slide magazine is brought to zero or rest position before a program is either recorded or displayed with random access via the forward-Z-reverse output signal 25th

518 causes the microprocessor to move the slide magazine continues until the slide IIull position switch input signal 560 indicates that the zero position has been reached.

It is now the mode of operation of the microprocessor 24 when encoding and recording Tonstroins "co3forraaten zum Creating a program tape with; random access with reference to b'ig. 12 will be described. Appropriately the program for encoding sound rushes with the puncture block 600 is entered, the represents the program time during which the program is on

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a timing interrupt is waiting. A timing interrupt is an internally generated microprocessor signal that that occurs after, a predetermined period of time, the can be selected according to the programming of the microprocessor. For example, occur at this state of the program Timer interrupts every 6.9 ms.

After the occurrence of a timer interrupt, represented by the function block: 602 in the program run, the checks Processor whether the cassette tape unit is in playback mode is how this is determined from the playback input at 556. The determination will performed in decision block 604. Is the answer YES, then the program goes to a decision block

606 for the status of the recording mode register to consider. The recording mode register is not Zero when the record back button is pressed and a 'Tonstromburst is just being recorded.

If the status of the recording mode register is zero, then the answer in decision block 606 is YES and the program flows to decision block 608 to ask the question to answer "Is the magazine movement status register

equal to zero? "The status of the magazine move register 25

is not zero when the magazine is rotating as based on this of magazine move input signal 566 is sensed. If the magazine is stopped, then the magazine move register Zero and the answer in the decision "

block 608 is YES "
oU

In this case the program goes to the decision block 610 where it is determined "Is the magazine stop timeout register equal to zero?" The magazine stop time-out register _ "Is set to a first value" a "after the slide magazine is set to Stop, to a value "b",

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after the tape cassette unit is set to "pause" or to a value c) after the tape cassette unit has been instructed to take the break. The values a, b and c represent various predetermined numbers that act as multipliers for the timer interrupt interval are used »If, for example, the register is set to the value represented by, a), a programmed time is then set for the slide lift meclianism 68 to complete its cycle can. If the register is set to value b) accordingly, a program time is offered to allow the To give the cassette player time for the pause mode to stop. Allowed after a pause cancellation notice the value represented by c) a program time to To start the cash register device. The different time intervals a, b and c give enough time for these functions be performed before keystroke entries are considered valid recognized.

If the magazine stop time-out register is zero, then that is The result in decision block 610 is YES, and the program proceeds to decision block 612 in which it determines is, "LST THE UNIT IN A RECORDING SWITCH-ON

OR IN A PAUSE MODE? ". The term" unit " 25th

is used for the CPU control 24 and the associated projector. The result in decision block 612 is YES when the recording enable output 574 is high corresponding to FIG correct sequence of entries on the keypad and when the cassette control is in playback mode or when the pause output is high.

If the answer is YES in decision block 612, it works Program to a function block 614, namely "GO TO KEYSNinil-D DECODING". In this program block

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32Λ8538-

β «t *

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-äff-.

then follows the Taateufeld decoding and display control program, wherein the keypad 28 is checked for keystrokes and controlling the display 550 accordingly

is made. The program then runs from function 5

block 614 to a decision block 616 where "is determined." becomes “IS THE UNIT IN PLAYBACK MODE?” »If it is not, the answer is NO and that The program runs to the "SET TASTENFELD-DE-" function block. ENCODING CONTINUE "(block 618). If the answer in decision block 616 is YES, the program advances to the determination block 620, in which it is determined, "IS THE. UNIT IN D2-t LOGGING-ON MODE?". is the answer ΙΓλΙΝ, then the keypad decoding program ge: ja3 Öl8 continued. Is the answer in the block

YES, then the program runs into the decision block with the question "IS THE RECORDING KEY PRESSED?".

The playback mode and the recording switch-on modes are checked to see whether a key has been pressed, since in the playback mode only pressing the pause key is permitted, while in the recording switch-on mode all keys except forward 1 and backward are valid entries ^are allowed ·

If the user wants to record a slide address signal, then he presses the Record-Zbackward key after he one or more digits by pressing the appropriate

2Q keys of the keypad 28 has entered. The program then goes into the recording routine. This matches with a YES in decision block 622 and the program passes to function block 624 with the function "VERDTOiKEL DISPLAY AND PUT" 1 "INTO THE VEHICLE MOVEMENT STATUS REGISTER". The "1" in the magazine move status register serves as a flag to indicate that

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the record button was pressed. Next, the program runs from function block 624 to Function block 626 with the function "GO TO MAGAZINE MOVEMENT PROGRAM ABOUT ". The program runs in the magazine bending program to decision block 628 where it is determined "THAT BECAME VALID NUMBER KEYBOARD ENTERED OR DECODED FROM THE TAPE? ". In the decision block 628, for example, an error display would result if the digits for 81 were entered or

would be decoded and the 80-position slide magazine is used. If no in decision block 628 then the program for function block 630 runs with the Function "Gi, HE IN FAILURE ROUTINE". Is a valid number or number entered via the keypad or from

Tape decoded, then the answer in decision block 628 is YES and the program advances to decision block 632, where the determination is made, "THE RECORD CHITllTGS-ISTRIEBSARTSTATUS REGISTER IS EQUAL "1"? ". If the answer is KEIIT, then the program runs to function block 6JA, with which the magazine movement section the program is continued. If the answer to decision block is yes, the program passes to function block 636 which deals with loading various registers

dealt with values that are for the remainder of the record-25

routine are required. Function block 638 includes also setting the timer so that the interval between internal interrupts is now 250 µs.

g ₀ The program runs back from function block 638 to function block 600 to wait for the next timer interrupt. After the next timer interrupt, the program again checks whether the unit is in playback mode ;,

After the next timer interrupt occurred is and the program is now through the blocks 600, 602,

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and 606 is running, the determination in block 606 is now HEIN, since the recording mode status register is set to the 1 state has been loaded. The program progresses from Function block 606 to function block 6A-0, the generation and transmission of a stream tone format on the data output 25b in 250 ps sections. That Data word that was sent out in the current surge according to function block 646 corresponds to the slide address number, entered using the keypad during the recording function.

After the current impulse format was sent (as shown in Fig. 11) to be recorded on the cassette tape (4A), the program proceeds to a decision block 642 where the determination is carried out "means the last TAKTIMHIIiO SENT HAS BEEN?". If the answer is NO, then the program runs through the interrupt enable function block and back to the puncture block 600 and again.

_ repeats through function block 640 until the complete one Burst tone format was output. If the answer is yes in decision block 642, then the program flows to Function block 6 ^ 6, where the recording mode status register is set to the 2 state, indicating that the recording is complete. The timer interrupt interval is then set to 6.9 ms and the program runs to function block 648, which the Represents magazine movement section of the program.

During the magazine movement program originating from function block 648 the magazine move status register is reset to zero so that the microprocessor is now ready for the recording of further slide address signals as surge formats ο

The function block 6-Ί0 comprises the various program functions, the; for sending the impulse format

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are required including format sections 500, 502, 504, 5OG and 508. In one embodiment are used for the recording function in

Function block 636 loaded various registers 5

for the corresponding enumeration and payment of their charged Positions used the 180 clock pulses for the Stromsto'iCormat section 500, the two zero pulses in burst format section 502, the 8-bit data word of the burst format section 504, the two zero pulses of the burst format section 506, and the 255 clock pulses of the burst format section 508. That the Format section 504 representing the 8-bit data word into a suitable register of inputs via the keypad loaded during the recording function. b

When the program now runs through the determination block 612 runs in the determination ΝΞΙΝ that Program in the surge decoding program routine of the 13 as indicated by program flow mark A. is.

The mode of operation will now be described in detail with reference to FIG of the microprocessor 24 for decoding sound

“Ρ format stream thrusts from the cassette tape 44 described. Here Tonstromstöße be decoded from the cassette tape 44 by means of the microprocessor 24 in "the Viedergabebetriebsarb. In particular, by the checkout means of the ι Ceiiöand Abnehmerkopfas 40 at 38

3Q picked up sound current impulse signals to the data input 25a placed. The generally sinusoidal input signal at 25a is processed via the input circuit 516, so that πich, a square input signal at the data input 514 results. In addition, the data input signal to 514 to the external interrupt data input 528 is applied when it is not through the logic link 522 is blocked.

The program according to FIG. 13 then runs from the reference marking Λ the decoding routine to decision block 652 where it is determined "IS THE UNIT IN THE

OPERATING MODE SELF-PROGRESSING OR SELF-PAUSE? "Is 5

If the answer is YES, the program then goes to function block 654 with the function "GO TO KEYPAD DECODING". When the answer to block 652 is NO _t indicating that the unit check is in the playback mode, then the program proceeds to decision block 656 where the data input signal 514 · the presence of a "1", ie a high level (5 volts) sensed will. This determination is made on the occurrence of each timer interrupt. Is located

the D? .ter> input signal on line 514 is high 15th

Level, then the answer is YES and the program runs to function block 658 to enumerate the valid pulse counter register by "1".

The program then moves to decision block 660 about where it is determined, "THE COUNTER REGISTER IS EQUAL FIVE? ". If the answer is NO and the counter register has not yet been enumerated to five, the program goes into function block 654, i.e. keypad decoding over to five impulses corresponding to the determination of one high level were detected after five corresponding timer interrupts. Having a high level at Enumeration of the pulse counter register on 5 detected ' has been, the result in block 660 is YES and the program goes to function block 662, which removes a Blocking at data blocking output 524 · and zeroing of the counter register. Various registers are also set for the rush current decoding sequence or loaded. The surge input signal at 514 is then applied to the external interrupt data input for decoding 52ä headed.

BATH ORIGINAL

If the answer in block 656 is NO, so that the voltage at the data input is low, ie at the Ilull level, then a function block 657 follows in the program in order to introduce a 310 ps delay. After the 310 µs delay, the program goes through decision block 659 to see if the delay function has been performed 15 times. If this is the case, then the program runs from function block 659 to function block 654 for another keypad decoding. If the answer to decision block 659 is no and the delay has been performed less than 15 times, the program loops from decision block 659 back to decision block 656 to again interrogate the drive input voltage. This ensures that no 5-volt signal is lost at the data input. This is particularly important when decoding 150 Hz tones as these signals correspond to 6.667 msec pulses which are very close to the 6.9 mc timer break interval. A ^r can be üxde

only to a check of the data input after every time-20

leave encoder interrupt, then it could be that the 150 Ηζ-ϊοη with 5 volt level never detected and thus this sound would not be decoded.

An external break occurs for every positive going-25

the rush transition, causing the program to transition to the external interrupt service routine; . This routine measures the width of each pulse and decides whether the pulse is a zero, a one, a Clock pulse or an I50 Hz pulse. The 150 Hz pulse is used to create a director's stop pulse from various program tape.erη with other coding formats specify a 1,000 Hz current surge of a predetermined duration for a single slide advancement and a 150 Hz rush current of predetermined duration for a regional stop rush current command use.

In any case, the microprocessor program determines the i'eststelluü two ITuIl pulses in a row that the next eight pulses the data bits for decoding one

Show slide address signal. These eight decoded 5

ImpuJ.se or eight information bits are stored in a data register is input and decoded, the program performing the "specified function" which the corresponds to eight bits of the decoded information.

V / ground 192 clock pulses detected before two zero pulses occur in a row, then the microprocessor determines 24 that a single slide forward sound signal from a program tape corresponding to a 1000 Hz sound current surge a predetermined length of time is decoded instead 15th

an encoded slide address signal. On the other hand, there are ten 150 Hz pulses before two zero pulses in a row is determined, then the microprocessor 24 puts the pause mode (direction stop) of the cassette device a. If an external interruption does not occur within 31.2 ms in the course of a sound current impulse decoding the previous external interrupt occurs, then the burst decode program routine is aborted and the timer interrupts are initiated again. This is done to prevent spurious signals 25th

cancel the command routine in an unfinished state and let it hang.

In the further program sequence according to FIG. 13, this follows Function block 662 a function block via line 664

666 (Figure 13b). After the timer has been set to 50 ps counts in this function block 666, the program runs to function block 668, in which the internal microprocessor connection 6 is set a _3δ for external interruptions. Here the connection 6 corresponds to the internal connection for the timer and interrupt control. This will cancel the timer interrupt

BATH ORIGINAL

operating mode is canceled and the external interrupt mode is introduced, while the program is through the Function block 670 is running. This internally generated microprocessor signal no longer resets the program counter to the timer interrupt phase, as in Figure 12, Program block 602. Instead, every occurrence an external interruption of the program counters of the microprocessor is set to a new position and again sets a 3% 2 ms time-out after the external Interruption.

The program runs from function block 670 to a decision block 672, where it is determined "ENTER THE EZTEBITE

INTERRUPTION BEFORE EXPIRING 31.2 ms OPEN? ". Is this 15th

not the case, then the answer in decision block 672 is NO and the program jumps out of the current burst decoding advance routine. again to make the interrupt timer effective for 6.9 msec intervals

and the program again performs the keypad decoding and 20th

Display routine by how it goes through the function blocks

676, 678 and 680 is shown. These functions are carried out in the event that interference signals the microprocessor program into a surge decode advance routine

could have switched. The time-out will also be sufficient 25

long so that some pulses can fail and the program does not jump to other program routine sections, for example because of a poor recording or like that.

If the answer in decision block 672 is YES with an external interrupt occurring before the 51.2 ms timeout, then the program runs through a function block 682, which represents the occurrence of an external interruption. The program then runs in the strobe decoding routine a. At the program point of function block 682,

BATH

measured a particular embodiment of the invention also performed several other functions. In particular, the first external interrupt that occurs is ignored

namely because at the point in time at which all commands 5

Ie have been performed before the rush current routine, the

first pulse may not be measured correctly. This is achieved by setting a register to zero when the first external interruption and queries occur "of the register for a continuation of the program 10

for the strobe decoding routine only if the content of the register is ITuIl corresponding to the second external interrupt. '

After the second interruption, the Pro-15 will run

gram to a function block 684 to set the timer to, for example, 254 units in the event of an external interrupt. The value of the timer is read when the next external interrupt occurs, the timer value being counted down by one count every 50 ps. So / ait, the result value read into the timer in function block 684 is an indication of the length of the pulse occurring at the external interrupt input 528. The decoding program then continues to determine whether the pulse was a clock pulse, a zero pulse, a one pulse, a 150 Hz pulse, or none of those particular pulses which would cause an error pulse. The program continues to decision block 686 to determine "IS A VALID PULSE DECODED?" If the decoded pulse is valid, then the program proceeds to decision block 688 with a determination "Have two zero pulses been decoded in a row?" If the answer in decision block is NO, which corresponds to a detected invalid pulse, then the program runs into function block 690 in order to apply a blocking signal _to data blocker 524. After function block 690, the pro-

gram to function block 692, whereby a Dehler program would be initiated, which is represented by the "Go to error" function.

It is assumed that two zero pulses were decoded in a row, so the decision in block 688 YES is and the program for a function block 6 ° A is running, according to which the decoded latency bits following the two Zero pulses have occurred, are placed in the holding register for the decoded data. The function block 696 follows the function block 696 for enumerating the "decoded data bit counting register by one unit when entering a data bit into the holding register for the decoded data, whereby the decodierb

th data bits are put together as an 8-bit word »

If the decision in block 688 is no (i.e., no two zero Ira pulses have been decoded in a row), then

₂ "The program enters decision block 698 to determine if a 1 KHz pulse has been decoded. If so, the program proceeds to decision block 700 where it is determined, "Is the Clock Count 1 register at zero?" The answer in block? 00 is YES,

2g if a clock pulse occurs before the two zero pulses have been decoded one after the other. In this situation the program effectively detects a 1000 Hz tone when the clock count register is equal to zero and the program goes from the YES decision path of block 700 to a function block 70? for the "1 slide forward" routine in response to a decoded 1000 Hz tone. If a KHz was decoded but the clock count register was not set to zero, then the NO path is taken from block 700 to block 666 to set the timer for %) ps counts.

The program goes through decision block 698 and if no 1 KHz tone was de ^ ded, the program runs to decision block 704 where it is determined "Has been." 150 Hz decoded? ". If not, then it works Program to function block 690 to generate a blocking signal to put on the data blocking input 524. this causes jumping into the error routine, there was a 150 Hz tone decoded, then the program flows from decision block 704 to decision block 706, according to which the 150 Hz counter register on zero or non-zero reading is checked.

The 150 Hz selection register, which is at the beginning of the decoding routine is set to a predetermined value, one count is incremented for each occurrence of a 150 Hz tone pulse counted. If the counting register has thus been counted down to zero, then a phase function is decoded and the program runs into function block 708

with the function "Entry into the cassette recorder-breaks-20

routine".

However, if a 150 Hz tone was decoded, it was the count register not yet counted down to zero, then the program runs from decision block 706 back to radio 25

tion block 666 to set the timer for 50 \ is counts and the external interrupt decode routine follows.

_go When the program flows through the decision block 700, the clock count register for 1000 Hz tone pulses is set to a predetermined value at the beginning of the decoding routine and is counted when a decoded 1-KKz tone occurs. Thus, if the clock count register contains zero, then a slide single advance function has been properly decoded

and performed in block 7OP. If a 7Mns- or NuIl-, as defined in connection with Fig. 11,

BATH ORIGINAL

decoded before the two NuI "J pulses decoded one after the other" then the occurrence of a one or zero pulse is ignored and the program remains in the

Surge decoding routine. Becomes a one or zero pulse 5

decoded after two zero pulses have been decoded in a row then the corresponding one or zero pulse is decoded as a one or Zero data bits in data word portion 504 of the surge format, which represents a slide address signal or a mode control command.

After; 5oniit decodes two zero pulses in a row as determined in decision block 668,

then the next eight pulses are data bits and each time 5

then, when a one or a zero is decoded, it is put into the lowest bit of the old register for the decoded data inserted and U2 one bit each shifted to the left. At the same time the decoded Data bit number register increased by one. When the decoding

th data bit count register except for eight, then the first decoded pulse is the highest bit in the decoded data holding register, while the last decoded Pulse is the lowest bit in this register.

This is represented in the ProgramafIu3 by the function 2B

blocks 69 ^ and 696 with the program proceeding to decision block 7Ί0 with the determination "Is the decoded data bit count register equal to eight? ' ^1st

If the answer is YES and the decoded data bit count register has been counted up to eight, then the decoding of the data word is complete and the program proceeds to a decision block 7 ^ 2 in which it is determined "Is the decoded number 213 * ois 255?" . In a special embodiment, if the decoded data word or the Nu ^- Jsei " ¹ corresponds to a Nu: amer

is in the range between 213 and 255, a predetermined one Area of data words: to which neither slide address signals nor decodable operating mode commands are assigned,

so that they are invalid data words. 5

If the answer in block 712 is YES, then that works Program to function block 714 and conduct an error routine a. If the number decoded during the decoding routine is found to be a valid number, i.e. that they are either a slide address signal number or a is correct mode control number, then the answer to block 714 is * NO and the program flows via the Function blocks 716, 718, 720 and 722.

The blocking is activated in the first function block 716 the input data blocking input restored. In Function block 718 will set the timer to 6.9 ms for the timer interrupt mode is set. Function block * 716 means an impression of a low Zero volt level ara data blocking input 524. The Function block 720 sets internal port 6 for timer interrupts. Function block 722 advances to a magazine movement program section, a corresponding magazine movement according to the 25th

execute decoded data word. In addition, that brings Program a predetermined number into the magazine stop time out register in such a way that clock pulses that were decoded after the data word are ignored and the program does not continue with the decoding routine. After the function specified by the decoded data word has run, the program is ready to decode further bursts when the unit is off. is still in the correct decoding mode.

If the decoded data word, as discussed above, is a valid slide address signal, for example in the area between 1 and 140 (with a 140-position magazine), then this will be

BATH ORIGINAL

Magazine to the correct position according to the microprocessor program emotional. The program determines the correct direction of movement to the desired decoded position relative to the current position of the magazine before the data word is decoded. The microprocessor program stores the address of the current position in a counter and receives slide counting data at an input 100, to maintain an instantaneous position count for the program and to determine when to end the magazine movement, i.e. when the correct position is reached became.

BAD ORDINAL

, Jos.

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Claims (1)

Slide projector control device patent application 1. Control device for a slide projector with a drive-VTransport-VOrrichtung, which carries a slide magazine, which a plurality of. Slide positions defined, and which selectively moves the slide tray to provide the slide positions of a Diawechselstation, and having a device for detecting the position of the drive ZTransportvorrichtung, characterized in that the locking device (92) comprises means (126 _t 128) responsive to the Address the position of the drive / transport device (68, 90) and ^{generate feedback signals (on 9 Z} O, which indicate the degree of alignment between the respective slide positions and the slide changing station, BADORiQINAL if the respective slide positions are within a predetermined position range of the slide changing station, and that a device (50) for generating a slide motion signal and means (56, 82) are provided which respond to the slide motion signal and the feedback signals for controlling operation the drive / transport device (88, 90) respond . 2. Control device according to claim 1, characterized in that the Peststellvorrichtung (92) further means (130) for defining an arrangement (e.g. 426) of equidistant ones Has openings (132), the openings being arranged in such a way that one opening corresponds to one of the slide positions in the slide magazine and the device (130) by means of the drive Z-transport device (88, 90) is moved along the slide magazine. 3. Control device according to claim 1 or 2, characterized characterized in that the detection device (92) has a light source (124) on one side of the device (130) defining the aperture assembly, and in that the feedback signal generating device comprises two photodetectors (126, 128) along the path of travel of the aperture assembly (130) and on the other side of the opening arrangement are provided such that light from the light source _on to both photodetectors (126, 128), falls if an opening (132) is aligned right above the midpoint between the two photodetectors. 4. Control device according to claim 3 »characterized geo ₅ indicates that the opening arrangement (130) and the photodetectors (126, 128) in a pre- BATH ORIGINAL * *** · —— · Ν 4 * Ii * * bgna «η (►« * · .- - * -K «I» # β Λ3 B r -3- ■ are arranged in a certain relationship to one another, in such a way that that the photo detectors receive an unequal amount of light from the light source when an aperture does not above the midpoint between the two photodetectors is centered, but is within a predetermined position range on one or the other Side of the center point is » 5. Control device according to claim 4-, characterized in that g e that the photodetectors (126, 128) do not receive light from the light source through the openings when none of the openings are within a predetermined position range of the Midpoint between the two photodetectors at 5 finds. 6. Control device according to one of the preceding claims, characterized in that a servo control (82) is provided, which is based on the differential output signal of the photodetectors for determining the direction of movement of the drive / transport device appeals to. 7. Control device according to claim 6, characterized in that a control device (118) is intended for forced movement, the VTransportvorrichtung the drive and for disconnecting ₃ Q on the Diabewegungssignal for controlling the operation of switching the servo control (82) responsive " 8. Control device according to claim 7 _5, characterized in that the control device (56, 82) has an operating mode control device (122, 120) which responds to the excitation of the photodetectors (126, 128) for ending the operation of the control device. BATH ORIGINAL direction for forced movement and for switching on the servo control responds. 9. Control device according to one of claims 3 "to 8, characterized in that the photodetectors (126, 128) consist of a photodetector chip with predetermined chip dimensions exist, the photodetector chips at a predetermined distance are arranged from each other, the openings predetermined Have dimensions and the photodetector chip dimensions, their spacing and the opening dimensions with one another are related such that predetermined unequal lighting characteristics for the photodetector chips result when one of the openings is lies within a predetermined range of the center point between the two photodetector chips. 10. Control device according to claim 9, characterized in that the photodetector chips made from a single assembly of devices (424) which has a housing for mounting and enclosing the photodetector chips, the housing surface running parallel to the photodetector chips directly above the latter from light- made of permeable material xst. 11. Control device according to claim 8, characterized by a slide lifting device (68), at a predetermined slide changing station for Controlling the transfer of a slide at the slide changing station arranged between a slide and a projection position for projecting an image of the slide is. BATH ORIGINAL 12. Control device according to claim 11, characterized g e ■ "-. indicates that the control device further includes a slide lifting control device (54-, 60, 64 and 100) to control the operation of the slide lift. device comprising "wherein the slide lifting control device is based on the forced movement control device upon initial receipt of the slide motion signal to transfer the currently in the Projection position into the slide magazine position responds, wherein the slide lift control device generates a switch-on signal (72) to the To put control device in a state in which they can operate the drive ZTransportvorrichtung after completion of the slide transfer to the slide magazine introduces. 13 · Control device according to claim 12, characterized in that the control device furthermore a device (96) for sensing the volume end of the slide magazine movement in a desired slide position and for generating a switch-on signal (at 98) for the slide stitch control device, wherein the slide lifting control device controls the slide lifting device to control the transfer of the slide the projection position from the slide magazine to the projection position to control ο 14. Control device according to claim 1, characterized in that g e - indicates that the control device 30th a driver amplifier (274) and a driver input signal (80, 95), wherein the driver amplifier (27 ^z O generates a drive Acansportsignal (on 86) to put the drive ZTransportvorrichtung in response to the driver input signal and xfobei the Driver amplifier one - W "ν · K. Device (29?, 288, 290) for generating an electronic Has brake signal that is used as a brake input signal after the driver input signal has ended nals is applied to the driver amplifier. 5 15. Control device according to claim 14, characterized in that the generating ^{device for 1,} the electronic braking signal has a resistor capacitor network (288, 290, 292) that receives the driver transport signal (on 86) as an input signal. 16. Control device according to claim 8, characterized in that the operating mode Control device comprises a device (e.g. 123 or 102) responsive to the loading of the drive / transport device responds to the termination time of the operation of the control device for forced To vary the movement and adjust the servo control according to the 20th Switch on the load on the drive-Z-transport device. 17 · Control device according to claim 16, characterized in that the load 25th appealing device a device (125) for Stop the operation of the forced movement control device and turn on the servo control at a point where the orientation of the aperture is over the center of the photodetectors the closer it is, the more the load on the Drive / transport device rises. 18. Control device according to claim 16, characterized in that g e * - "C indicates that the drive / transport device a drive motor (88), and . "_;:". ■ - ..:>, "-3H8538 Λ »ΛΑ. * Λ J » "IAS * -t" · K tt "ι ι * A V- *", fl- ■ * ■ * ■ A -7- the load responsive device one Device (102) / sum sensing the current in the Drive motor has, wherein the current sensing device has a device for generating a Control signal (155) which is representative of the load on the drive ZTransportvorrichtung is that the mode control device comprises a termination control device (122) which is responsive to the Control signal and the excitation current of the photodetectors to terminate the operation of the control device for forced movement and to turn it on the servo control responds. 19. Control device according to claim 18, characterized in that 15 indicates that the termination control device comprises a comparator (258) for comparing a DC voltage reference signal and a combined signal of the control signal and a photodetector signal (156), the photo ο \ s / > detekoorsignal proportional to the current through the Is photodetectors and the comparator outputs a termination signal 158 when the combined signal. and the DC voltage reference signal is a predetermined one Fulfill relationship. 20. Control device according to claim 19, characterized in that g e that the control signal varies the signal level to the comparator, the control signal being the DC bias level of the combined Shifts signal continuously proportional to the current of the drive gate " 21. Control device according to claim 20, characterized in that that the mode control device has an opening orientation detection device BATH ORIGINAL direction (123) which applies a shifted DC voltage reference level to the comparator, when the opening is in the aligned position about is located centrally between the two photodetectors. 5 22. Control device for a slide projector, characterized by control means (24, 10), responding to predetermined slide address signals on a data Pick-up input (e.g. 25a) for generating slide magazine movement control signals (at 52) responds; and by a transport device (88, 90), which on the slide magazine movement control signals for controlling the position of a slide magazine (e.g. 410 or 430) in predetermined Responds to slide positions according to the coded slide address signals, each of the coded slide * - address signals corresponds to a slide position of the slide magazine and encoded as a predetermined combination of audio tone bursts. 23. Control device according to claim 22, characterized in that each of the predetermined encoded slide address signals a data word (504) is represented by a predetermined number of Data bits is defined.
25th 24. Control device according to claim 22, characterized by tape transport and transfer devices (40, 42) responsive to a recorded program tape (44) for random access for transmitting the encoded slide address signals from the recorded random access program tape, wherein the tape transport and transfer devices transmit the encoded slide address signals to the data Apply transmission input (25a). BATH ORIGINAL .-.--.: ..-. "J248538 25. Control device according to claim 24, characterized in that the program tape (4-4) has at least two tracks and a plurality of encoded slide address signals in the first and voice information are recorded in the second track in synchronism with the encoded slide address signals. 26. Control device according to claim 25 * g e k e η η records by means (24, 640) for encoding the slide address signals and for recording of the encoded slide address signals on the random access program tape. 27. Control device according to claim 26, characterized in that 15 indicates that each of the slide address signals is passed through an encoding and recording device encoded and as part of a predetermined surge formal; π is recorded, the latter from the sequence of a predetermined number of reference pulses (500), at least two pulses (502) of a first distinguishable type and the slide address signal (504). That the encoding and recording apparatus, a keypad 28 having control means according to claim 26, characterized in that (28) of the manually operable means for inputting the address of the slide position for encoding be ^sitting ~ - 29 »Control device according to claim 28, characterized in that the control device furthermore has devices (24, 10, 626, 628, 632, 634), on the coding and recording device for generating slide magazine movement control Address signals that are required in order to cause the transport device to move the slide magazine moved to the position indicated by the encoded Slide address signals is displayed. 5 30. Control device according to claim 26, characterized in that the slide address signal is encoded by a predetermined number of pulses representing a binary number., the pulses are of two different types, respectively, zero and one. 31. Control device according to claim 22, characterized in that the control device Furthermore devices (92, 56, 100, 24, 560) for determining the current slide position of the slide magazine as well as devices (24, 5Ί8, 686, 688, 694, 696, 710, 722) on the devices to determine the current slide position and 20 address the encoded slide address signals to determine the direction of minimum slide magazine travel to arrive at the position corresponding to an encoded slide address signal. 32. Control device according to claim 3I, characterized in that the devices for Determining the instantaneous position have a device (92) that reacts to the movement of the slide magazine to generate a step position signal (e.g. 156 or 100) indicative of movement of the Slide magazine from one predetermined slide position to another. _{Q [} - 33 · Control device according to claim 22, geke η η is characterized by a manually operated BATH ORIGINAL direction (28) for entering slide address codes, which has a plurality of input devices, each of which represents one of the digits 0 to 9, wherein the slide address coding is based on the plurality of 5 entered by input devices as digit encodings that represent predetermined slide positions and in that the control device further comprises a device (24, 614 *, 618, 50, 56) which operates on over the manually operable device entered slide address encodings for generating the slide magazine movement control signals appeals to. 34. Control device according to claim 22, characterized by a device (530, 540, 24), responsive to the control device for displaying the slide position to which the transport device is directed is controlled. 35. Control device according to claim 22, characterized in that that the control device further comprises a device (e.g. 24 or 36), the standard slide incremental signals at the data transmission input is responsive for generating an individual slide index control signal, the standard slide index signal has a predetermined number of pulses with 1 ms period. 36. Control device according to claim 22, characterized in that that the encoded slide address signals by a pulse width modulation technique are encoded, each of the encoded slide address signals a binary data word (504) represented by a predetermined number of binary data bits is defined, each of which is one or zero, whereby a data word can define 2 slide addresses, where N is the number of data bits in the binary Data word is, each data bit in the encoded 'slide address signal by a one or a NuIl' Trnpuls is pictured. 57. Control device according to claim 36, characterized in that the zero and one pulse have correspondingly different duration with respect to a nominal reference duration. 38. Control device according to claim 37 »characterized in that the nominal reference duration is 1 ms, either the zero pulse or the One pulse greater than the reference duration and the an-Ib which are smaller than the reference duration according to a predetermined one and zero coding format. 39- Control device according to claim 3 &> characterized in that the control device further comprises a device (24, 704) which responds to a coded standardized directional stop signal ^; for generating a director's stop control signal, the coded standard director's stop signal having a predetermined number of pulses of 6.67 ms duration. 40. Control device for a slide projector, characterized by a manually operable device (28) for entering slide address codes with a multiple " number of input devices each representing a corresponding one of the digits 0 through 9, where the slide address coding over the multitude of Input devices are entered as digit encodings; ■ * BATH ORIGINAL a control device (24) which, in response to actuation dex ', generate a manually operable device of predetermined coded slide address signals (on? 5b) which the input slide address encodings in a predetermined format, wherein each of the encoded slide address signals has a slide address corresponding to a position of a slide magazine; and a device (40, 42) for recording the encoded slide address signals on a record carrier (e.g. 44). 41. Control device according to claim 40, characterized in that that each of the encoded slide address signals have a corresponding binary encoded Represents data word (504) with a predetermined number of data bits. 42. Control device according to claim 41, characterized in that the data bits through a zero or a one can be represented, the encoded slide address signals having a predetermined Number of pulse width amodulated pulses are corresponding to the predetermined number of data bits, each data bit as a predetermined full or One pulse with a pulse duration in the X low frequency range is coded. 43. Control device for a slide projector, characterized by a manually operable device (28) for entering slide address codes and predetermined mode command codes having a plurality of input devices, a first Numerous input devices correspond to defined functions (e.g. pause, forward 1), such that the actuation of one of the input devices · ^ results in the first multitude of a defined 5 Functional representation corresponds, each of a second plurality of input devices having a corresponding one of the digits 0 to 9 and where the slide address codes and the command codes entered as numeric codes via the second plurality of input devices; a control device (24) responsive to the actuation of the manually operable device for generating predetermined control signals in response to predetermined operating mode command codes, diaadres addressing encodings and defined functions, and a Progektorvorrichtung (10, 3 ^), which on the Control signals for controlling predetermined Prooection functions including the slide magazine transport. 44. Control device according to claim 43, characterized in that the control device also program tape coding and recording devices (24, 636, 640) for coding and recording predetermined mode command signals in one predetermined audio burst format in response to the operation of the "manually operable" devices for entering predetermined operating mode command codes and has slide address encodings. 45. Control device according to claim 44, geke η iQ ~: draws through a prograin band control pre-. 35 direction (40, 42), which refer to the coded Tonstromntoßforrnate for recording a program tape (44) BATH rait representations of one or more of the operating mode command codes and representations of one or more slide address encodings. 46. Control device according to claim 43, characterized in that the Diaadresseneodierungen on the manually operable device by the codes 1 to N and the predetermined Eetriebr, type ~ command codes are entered as predetermined numerical codes greater than K, where Il is equal to the number of Slide positions in a jazin is. 47. Control device according to claim 46, characterized in that it is 15 indicates that the first plurality of input devices is an execution function input device having, wherein the control device after actuation of the execution function input device responds to an entered predetermined Execute operating color command coding » 48. Control device according to claim. 46, characterized by that the projector control devices have a device (88, 90) for carrying and conveying a slide magazine with a predetermined number of slide positions N and a device (68) for projecting one on a predetermined Pro ™ jection station has offered slides, wherein the control device responds to an input Slide address coding and operation of the execution function input device, to generate control signals that condition the projector control device so that they the slide magazine support and Conveyor device with the predetermined slide position to the projection station according to the entered BATH ORIGINAL beneath slide coding positioned. 49. Control device according to claim 43, characterized in that the first plurality of I ¹ "input devices has an output function input device, the control device being responsive to the actuation of the output function input device in order to generate control signals which condition the projector control device in such a way that it enters the slide magazine promotes a predetermined starting position. 50. Control device according to claim 43, characterized in that one of the predetermined ten mode command codes a maintenance code is, wherein the control device comprises a device that is responsive to the input of the Maintenance coding responds to a self-diagnostic routine perform to the correct way of working to determine the control device. 51. Control device according to claim 44, characterized by a display device (530), the slide address codes and command codes input to the control device for display appeals to. 52. Control device according to claim 511, characterized in that that the control device means (24) for suppressing display of said display means; during coding and recording of operating mode command coding has address coding. ORIGINAL • κ m -H Ψ * m - · *. λ * ■ - -17- 53- control device according to claim 52, characterized in that indicates that one of the specific Operating mode command codes a display under is press coding, the control device. is responsive to the input of the display suppression coding to provide a control signal for suppressing the To generate display of the display device and that one of the predetermined operating mode command codes is a display switch-on code, the control device responds to the input of the display switch-on code in order to generate a control signal, via which the oie display device is switched on again. 54-. Control device according to claims 4-3, characterized in that the control device means (24, 628) for determining valid inputs from the second plurality of input devices cries, where valid inputs are defined srnc! as slide address coding accordingly a predetermined number of defined slide positions in the projector device or as a predetermined one Operating mode command coding. 35 ' Control device according to claim 54- »characterized in that the projector control device has a device (88, 90) for carrying and conveying a slide magazine and a device (e.g. 4-60) for generating a magazine type control signal for the control device to a predetermined Identify numbers of magazine types that can be carried by the projector control device, the device being responsive to the magazine type control signal for determining valid inputs. BAD ORiGiNAL 56. Control device for a slide projector, characterized by a locally arranged manually operable one Input device (28) on the slide projector 5 for entering slide address codes and command function codes mounted, the manually operable input device comprising a plurality of input devices; a remotely located manually operable input device (30) for entering slide address codes and command function encodings, wherein the remotely located manually operable input device comprises a plurality of input devices and wherein the remotely located manually operable input device is disposed remotely from the slide projector; and a control device (24 ·), which is based on the locally arranged manually operable input device and the remotely operated by Hc.nd Means for controlling the operation of the slide projector according to the inputs via the corresponding input devices the locally arranged manually operated input devices and the remote arranged manually operable input device device is responsive, the control device being responsive to a predetermined remote turn-on command coding, which was entered via the remote manually operated device, and the locally _OA arranged manually operated device switches off, wherein the control device further "responds to a predetermined! 'Ern switch-off command coding, which was entered via the remotely triggered manually operated device and the - / - · gg locally arranged manually operable device turns on again, the control device not BATH 32A8538 responds to inputs via the locally arranged operated by hand. <., · Input device or the removed; arranged input keys that can be operated by fDind device, if the corresponding input device-5 device is switched off. 57- Control device according to claim 56, characterized in that the _disposed} removed before! Hand-operated input device has an infrared transmitter device and the control device has an infrared receiver device (52). 58. Control device for a slide projector, characterized by
15th a manually operated device (28) for entering slide address codes and predetermined Mode command encodings via a variety of input devices according to the Digits 0 to 9; a control device (24,10), which is connected to the manually operable device for controlling the operation of the slide projector including the slide magazine transport responds, wherein the control device a Encoding device (24, 636, 640), which on the Operation of the manually operable device is responsive to encoded slide address signals and mode command signals at a tape transmitter output (25b), the control device further decoding means (24, 686, 694, 696) responsive to the encoded slide address signals and ^: the mode command signals on a tape transfer input (25a) for controlling the operation of the slide projector; BATH v / ob for entering a predetermined recording mode correlation (e.g. coding 21J) on the manually operable device the control device ready for coding signals at the tape transmitter output according to below input slide address signals and mode command signals, the control device being responsive to the input of slide address signals via the from Hand operated input device for controlling the 10 Slide projector to display the slides according to the slide address coding, project that was entered in a manual operating mode with random access, wherein the control device is responsive to encoded slide address encodings at the tape transfer entrance and the slide projector for projecting the lias in accordance with that provided by the control device decoded slide address encodings. 59 »Control device according to claim 58, characterized in that the control device responds to a predetermined automatic advance mode command coding, entered via the input device to the slide projector for the projection of slides with a predetermined from-25 to control the selected speed. 60. Control device according to claim 58, characterized through a program belt transport OQ and transmitter device (4-0, 4-2) for selective Transporting a program tape and transmitting signals on the program tape. the tape transfer input and recording signals on the program tape from the tape transmitter output, wherein gg the control device also includes a tape transport control device (24, 550, 552) for the selective Controlling the switching on and off of the tape transport and the transmission device, which responds to a predetermined break in authoring and the undefined Pause mode command encodings decoded from the program tape for controlling the Disabling the tape transport functions for predetermined intervals in accordance with the out-of-mode encoding and to pause the tape transport functions indefinitely responding to the undefined pause command coding. 61. Control device according to claim 60, characterized in that g e that the manually operable input device has a restart input device having direction, wherein the control device responds upon actuation of the restart input device to activate the tape transport function after decoding an unlimited pause coding of one To operate the program tape.
20th 62. Slide projector with a position scanning arrangement (90, 92, 130) for scanning the position of a slide magazine tran sport on order (90) of the slide projector, with the __ Marked position sensing arrangement is through: a device (130) with a coded arrangement for movement that is directly related to the movement of the Is correlated with the order of the slide magazine, where the coded assembly device has two planar assemblies (4-26, 428) shown in FIG predetermined patterns are provided, a first of the arrangements of a predetermined plurality controlled positions of a first type of slide magazine (e.g. 410) and the second of the arrays of a second predetermined plurality of controlled BATH ORIGINAL Positions of a second type of slide magazine (e.g. 430) corresponds to and a position locking device (92) for determining the position of the device with encoded Arrangement, wherein the position locking device is an energy generating device (e.g. 124) and energy detection devices (e.g., 126, 128), the energy generating device and the Energy detectors in a practically aligned condition at a predetermined fasting station are arranged. 63. Slide projector according to claim 62, characterized in that g e k e η η that the energy setting devices include first and second energy setting devices having first and second energy locking assemblies, each of which are in alignment is arranged with a corresponding one of the arrangements mentioned. 64. Slide projector according to claim 63, ge characterized by a device for controlling the energy setting arrangements for selective operation of the first type of slide magazine or the second type of slide magazine. 65. Slide projector according to claim 62, characterized in that the device is coded with Arrangement a substantially planar member (130) and the two planar assemblies (426, 428) have energy permeable members (132). 66. Slide projector according to claim 65 »characterized in that the energy-permeable glass of the openings (132) formed through the coded array device. ^ BATH ORIGINAL 67. Slide projector after. Claim 66, characterized in that g e k e η η draws, that the energy generating device has a light source (Ί24) and the energy locking devices a photodetector device (126, 128) include. 68. Slide projector according to claim 62, characterized in that g e k e η η ζ ei ch η e t that the first magazine type a 80-slide magazine and the second type of magazine a 140-slide magazine is" 69 »Slide projector according to claim 62, characterized in that the positioning device furthermore a selectively positionable device 15 (438) for selectively positioning the position locking device between correspondingly aligned positions with respect to each of the first and second arrays having. 70. Slide projector according to claim 69, characterized in that the device is coded with The assembly is substantially a planar member (130) having a circular periphery, each of the foregoing Arrangements (426, 428) have an essentially catch-like ring "forms, the position locking device is movable substantially parallel to the plane of the flat ring. 71 slide projector according to claim 69, characterized in that g e k en η, that the selectively positionable device has a switch (460) for selecting either the first magazine type operation or the second magazine type operation and an actuator, which responds to the switch has » BATH ORIGINAL 72. Slide projector according to claim 62, characterized in that the drive / transport arrangement ~ tion has a turntable (412), the device with a coded arrangement having a circumferential ring (1JO) and the planar arrangements, circumferential arrangements are, wherein the turntable is a turntable receiving arrangement for carrying the ring, the ring as a portion of the turntable below the upper surface of the turntable is formed, 10 who carries the slide magazine. 73 · Slide projector according to Claim 72, characterized in that each of the planar arrangements (426, 428) is an array of spaced apart openings (132) formed through the ring (130). 74. Slide projector according to claim 73, characterized in that the turntable receiving device has a smaller diameter dimension with respect to the upper turntable surface, so that a circumferential gap (420) formed between the opening ring (130) and the upper turntable surface will. 75 slide projector according to claim 74, characterized in that the energy generating device an exposure source (124), the exposure source being exposure transfer means (422) and a light source adjacent the exposure transfer means wherein the exposure transfer means in the circumferential gap (420) are arranged, wherein the energy detection device comprises a photodetector arrangement (126, 128), arranged below the opening ring .und aligned with the exposure transfer means; is. BATH ORIGINAL -25- 76. Slide projector according to claim 69 "characterized in that the selectively positioned" bare Contraption; responds to a predetermined bleed (432) of a magazine of the second magazine type (430) for positioning the position locking device in an aligned position with the second assembly (428) when a magazine of the second Magazine type is placed on the slide magazine transport arrangement o ■. 10 77 »Slide projector according to claim 76, characterized in that the energy generating device (124) and the energy locking device (126, 128) are arranged on opposite sides of the device (130) with a coded arrangement » 78. Slide projector according to claim 76, characterized in that the selectively positionable Device on an actuating device (434) which is responsive to the predetermined portion of a magazine of the second magazine type, and a movable member (438) responsive to the actuator and the power generating device and carries the power lock. 25th 79 «Slide projector according to claim 78, characterized in that the actuating device is displaceable to move into a first predetermined Sighting when the actuator is in contact 30 with the predetermined section of a magazine of the second type of magazine, and for movement in a second predetermined direction substantially transversely to the first predetermined direction in contact with the Actuating device against the movable member an-35 is ordered. BATH ORIGINAL -26- 80. Slide projector according to claim 79, characterized in that the movable member is a Has cam (436) for engagement with the actuator. 81. Slide projector according to claim 80, characterized in that the predetermined section (432) the second type of magazine distinguishes it from the first type of magazine. 82. Slide projector according to claim 81, characterized in that the predetermined portion of the second type of magazine has a portion of the magazine release mechanism to rotate the slide To enable positions within the slide magazine. 83. Slide projector according to claim 76, characterized in that the device with coded arrangement is a substantially planar member (130) with a circular circumference, each of said arrangements forming a substantially circumferential ring and the position locking device movable substantially parallel to the plane of the flat ring ^is * 84. Slide projector according to claim 78, characterized by a switch (460) for indicating a Initial state indicating the positions of the movable member, the switch being a contact member (464) carried by the movable member and a second contact member (462) fixedly attached to the slide projector, the Contact members are interconnected when the movable member is in its second. Position. gAD ORIGINAL 85- üiaprojektor according to claim. 84-, characterized in that one contact member is a Has spring arm which is in contact with the second contact member when the movable member is in the second position. BATH ORIGINAL