US1954956A - Rayon spinning machine - Google Patents

Description

April 17, 1934- J. J. SIPPEL 954,956

anon SPINNING CHINE Filed Feb. 1'1. 1930 5 Sheets-Sheet 1 mvmroa- John Jbsqnkflm' April 17, 1934. J $||=PEL 1,954,956

RAYON SPINNING MACHINE Filed. F b, 17, 1930 5 Sheets-Sheet 2 WITNESSES c7 INZZZI/SCQR: Z

22 ose z W441 d My B} 0 I lira/3 X I I I #Q G N TTORNEYS.

J. J. SIPPEL 954,956

RAYON' SPINNING MACHINE April 17, 1934.

5 Sheets-Sheet 3 Filed Feb. 17, 1950 jgl mmmmnuminimumummumgg; Q

I NVENTOR:

A TTORNEYS.

WITNESSES April 17, 1934. J4 J s L 1,954,956

RAYON SPINNING MACHINE Filed Feb. 17. 1930 5 Sheets-Sheet 5 J01 J J06 1141? Fla Y J05 J00 109 WITNESSES INVENTQR;

112222 Josep z S P/ ei,

Patented Apr. 17, 1934 RAYON SPINNING MACHINE John Joseph Sippel, Upper Darby,

The Wicaco Pa., assignor to Machine Corporation, Philadelphia, Pa., a corporation of Pennsylvania Application February 17, 1930, Serial No. 428,871

11 Claims.

This invention relates to machines for spinning artificial silk or rayon from cellulose.

. In rayon spinning machines, as ordinarily constructed, the cellulose is delivered under pressure to the spinnerets for conversion into individual multi-filament yarns which are taken up as fast as they are formed, by revolving spools, whereof there are usually two provided for interchangeable use with each spinneret so that the machines may be maintained in continuous operation. Considerable difliculty has been experienced heretofore in producing rayon yarns of uniform gage due to failure of the means relied upon in the machines for differentially driving the two sets of winding spools in an endeavor to maintain a constant surface speed as between the active and inactive spools, particularly at the time of substitution of one set for the other. My invention is in part directed toward overcoming the above recited drawbacks through proision in rayon spinning machines of a simple andreliable variable speed mechanism embodying separate units for the two sets of spools; and through provision, in addition, of timing mechanism with a master control means to concurrently govern the component units of the variable speed mechanism in such manner that the active set of spools is uniformly decelerated compensatively with growth of the yarn on them, while, at the same time, the currently inactive set of spools is correspondingly accelerated in prep aration to ultimately take the place of said active spools when the latter are fully wound.

Another object of my invention is to enable, in connection with variable speed mechanism having the indicated attributes, predetermination of maximum and minimum speeds for the two spool sets in accordance with the gage of the yarn which is to be wound.

A further object of my invention is to enable, through provisions incorporated in the timing mechanism aforesaid whereby the variable speed mechanism is controlled, predetermination of different cycle periods for the machine in accordance with the amount of yarn which is to be wound on the spools. My invention is also in part directed toward provision of facilitities whereby the driving relation as between the variable speed mechanism and the pumping units for delivering the cellulose may be altered, so that, in conjunction with the other provisions for adjustment and regulation previously noted, the machine may be adapted to various conditions of operation in satisfying the dictate of practice.

Another object of my invention is to secure the advantages of greater compactness in the construction of rayon spinning machines through provisions enabling closer spacing of the spools as well as of the pump units by which the cel-- lulose is delivered to the spinnerets.

Still other objects and attendant advantages of this invention will be manifest from the detailed description hereinafter considered in conjunction with the accompanying drawings, whereof Fig. I is an elevation of one side of my improved rayon spinning machine, a portion of the structure being broken away to expose important details which would otherwise be hidden.

Fig. II is a partial elevation of the opposite side of the machine.

Fig. III is an elevation of the left hand end of the structure as considered in Fig. I, likewise with portions thereof broken away and others in section to expose details of construction.

Fig. IV is a transverse section of the machine taken as indicated by the arrows IVIV in Fig. I.

Fig. V is a fragmentary plan view taken as in-' dicated by the arrows V-V in Figs. I, II and III.

Fig. VI is a detail cross sectional view taken as indicated by the arrows VI-VI in Figs. I and V. v

Fig. VII is a fragmentary illustration on a larger scale showing certain details associated with the control means which governs the cycle periods of the machine.

Figs. VIII and IX are detail views showing alternative arrangements of the spools upon which the rayon is wound.

As depicted in these illustrations, the rayon spinning machine of my invention comprises a supporting structure 10 with spacedtransverse frames 11, 12 and 13 which are connected by upper and lower longitudinals 14, 15. Resting on the lateral wing portions of the transverse frames 11, 12 and 13, (Figs. I, II and IV) are troughs 16 which extend lengthwise of the ma chine and contain the acid solution whereby the cellulose is set, said troughs being flanked by acid drip catch gutters 1'7 containing water for dilution. The cellulose is conducted from a suitable source of supply, not shown, through longitudinal pipes 18 which are co-extensive with the troughs 16 and respectively serve groups of spinning units 19 along opposite sides of the machine. Each of the spinning units 19 comprises a rotary pump 20 that delivers the cellulose through a goose neck tube 21 to a spinneret 22 submerged in the contiguous acid trough 16 for conversion into multi-filament yarns Y. As shown, the pumps 20 are actuated by spiral gear couples 23 from line shafts 25 which are driven, through gear tran missions 26, from a main shaft 2'7 extending transversely of that end of the machine pictured in Figs. II and III, in bearings 28. In the illustrated instance, the machine is operated, through a belt connection 29, by an electric motor 30. As.

shown in Figs. I, II and III, the motor is sup-" ported on a bridge piece 31 between the transverse frames 12, 13 of the supporting structure 10. By virtue of the described arrangement, the pumps 20 are all driven in unison so as to deliver the cellulose to the spinnerets 22 at a uniform rate and pressure. In order that such delivery rate and pressure may be varied as required to predetermine yarns of different gages, I make provisions for interchanging one of the component gears of each of the transmissions 26. This gear is in each instance designated by the numeral 32 and is fixed, together with the gear 33, on a stud 34 which is removably secured in the end of an arm 35. This arm 35 is free on the axis 36 of a bevel gear 37 constituting another component of the transmission 26, and a segmental portion 35a thereof has an arcuate slot 38 concentric with the fulcrum axis 36 for passage of a clamp bolt 39 that takes into the frame 13. The arm 35 can thus be secured in different positions in order that interchangeable gears 32 of different sizes may be accommodated. Ordinarily, the transmissions 26 are protected by shrouds which are removably secured to the frame 13, one of such shrouds being indicated at 40 in Figs. I, II and III.

As fast as the yarns Y are formed, they are taken up by spools whereof there are two sets 41, 42 at each side of the machine adapted to be alternately used with the spinning units 19, so that the machine may be maintained in continuous operation by throwing the yarns Y over to the empty spools when the other set of spools has been fully wound as later explained in greater detail. In the present instance, instead of being all disposed in single rows as usual heretofore in rayon spinning machines, the spools 41, 42 are arranged in staggered relation, such arrangement obviously permitting closer spacing of said spools as well as of the spinning units 19, to the advantage of rendering the machines more compact as regards length. As shown in Fig. IV, the spools 41, 42 are mounted on opposite ends of spindles 43, 44 which are rotatively supported transversely of the machine in bearings 45. These bearings 45 are secured on splash panels 46 that extend upward from the. level of the acid troughs 16 at opposite sides of the machine and form the side walls of a longitudinal enclosure 47 centrally over the supporting structure 10. Protected within the enclosure 4'7 are line shafts 48, 49 which are integeared as at 50, 51 with the several spool spindles 43, 44, said line shafts being j ournalled in bearing brackets 52 that reach upward from the top longitudinals 14 of the supporting structure 10. The enclosure 4'? is provided at the top with a hinged door 53 through which the parts within are readily accessible for the purposes of inspection and lubrication. In order to confine the acid splash attendant upon vibration of the yarns Y, en route from the spinnerets 22 to the spools 42, the top wall 54 of the enclosure 47 is extended laterally (Figs. III and IV) to form, in conjunction with end partitions 55, hoods over the spools 41, 42 and the acid troughs 16 at opposite sides of the machine. Provisions in the form of ducts 56 above the hoods are also made for conducting away acid fumes which enter said ducts by way of bottom perforations 57 under suction induced by suitable means not shown.

Incident to winding, the yarns Y are evenly distributed along the length of the spools 41, 42, by traversing guides 60, there being one such guide for each pair of said spools. As shown in Figs. I and III, the guides 60 are attached to longitudinal bars 61 which are sustained by drop brackets 62 depending from opposite ends of transverse rods 63. These rods 63 are slidable endwise in bearings 64 on the splash panels 46, and reciprocatory motion is imparted to them by arms 65 fast on a tubular rock shaft 66 that extends lengthwise through the center of the machinein the interval between the splash panels 46 below the enclosure 47. The tubular shaft 66 is journalled in appropriate bearings 67 afforded by the transverse frames 11, 12, and is oscillated through coordination of a lever 68 at one end thereof, with actuating mechanism in a housing 69, said housing being bolted fast to the transverse frame 12, as shown in Fig. I. The mechanism in the housing 69 is operated through a spur gear couple 70 from a counter-shaft 71 which is driven from the main shaft 27 of the machine, through a bevel gear couple '72 enclosed in a casing73 on the frame 13, see Figs. I and II. The means just described for actuating the traversing guides 60 does not in itself form a part of the present invention and has not therefore been illustrated in very great detail in the drawings. The yarn guides 60 per se, are however novel in that each of them embodies two spaced eyes 9, j which are symmetrically disposed relative to the corresponding pair of spools 41, 42, both said eyes lying within the bisecting perpendicular to a line m, n, Fig. VIII, through the centers of the spools 41, 42. The yarn Y is thus confined to a course involving similar easy angular deviations incident to passage to the spools 41, 42 so that the drag or tension induced, although slight, is the same in either case with assurance against irregularities which might result in unevenness in the gage of the yarn Y.

In cases where extreme compactness of the machine is not of prime importance, I may resort to the modified arrangement shown in Fig. IX in order to secure the advantages of a more direct course for the yarn Y between the spinnerets 22 and the winding spools 41', 42. Here the yarn guide 60 is provided with but a single eye e which corresponds in position to the eye e of the first described embodiment in that it is symmetrically disposed relative to the associated spools 41', 42', while the spinneret 22' is so allocated that the yarn Y without deviating follows the bisecting perpendicular to a line m, n, through the centers of said spools enroute to the eye e.

In order to insure uniformity in the gage of the yarns spun on the machine, it is essential that the active set of spools 41, 42 be gradually decelerated compensatively with growth of the yarn Y thereon for maintenance of a constant surface speed at all times; and that furthermore, to enable continuous spinning, it is requisite that the currently idle set of spools 41, 42 be accelerated at the same time in preparation to ultimately take the place of the active spools when the latter are fully wound. Such coordinated operation of the spools 41, 42, I attain with the variable speed means comprehensively designated by the tary cam 101, see Figs. I, III, V and VII.

numeral .75, the same being supported on a bridge plate 76 that spans the tops of the transverse frames 12, 13 at one end of the structure 10, see Figs. 1, II and V. As shown, the means comprises two separate variable speed units 77, 77a, which are arranged in superposed relation and have their parts supported in rectangular frames '78, 78a. It will be observed that the variable speed units 77, 77a are of a well-known commercial type, respectively embodying pairs of two part pulleys 79, and 79a, 80a, which are mounted on parallel primary and secondary shafts 81, 82 and 81a, 82a, and connected by belts 83, 83a. The components of the pulleys 79, 80 and 79a, 80a are counter coned and splined on their shafts 81, 82 and 81a, 82a, with capacity for being shifted relatively by regulating means, whichinclude pairs of levers 84, and 84a, 85a. These levers 84, 85 and 84a, 85a are afforded fulcrum support on the frames 78, 78a at points centrallybetween the shafts 81, 82 and 81a, 82a, and are pivotally connected respectively to corresponding components of the pulleys 79, 80 and 79a, 80a. As shown in Figs. I, II and V, the secondary shafts 82, 82a of the two variable speed units 77, 77a are coordinated, through sprocket chains 86, 87, with the line shafts 48, 49 for the spools 41, 42. The primary shafts 81, 81a, on the other hand are fitted respectively with sprocket wheels 88 of like pitch diameter for rotation in unison, by means of a chain 89 under power derived from the main shaft 27, through a transmission comprehensively designated by the numeral 90 in Fig. III. This transmission 90 embodies a series of spur gears 91,

- 92 and 93, as well as a bevel gear couple 94 whereof one of the components is secured to a vertical shaft 95 which extends down into the casing 73 that houses the bevel gear couple 72 previously referred to. Motion is communicated to the shaft 95 by a miter gear 96 thereon in mesh with a companion miter 97 on the main shaft 27. As a consequence of this arrangement, it will be apparent that the primary shafts 81, 81a of the variable speed units 77 are driven at a constant 1 speed having a definite relation to the speed and delivery rate of the spinning units 19. It is however possible to independently alter the drive of the variable speed units 77, 77a through replacement of the gear 91 by others of larger or smaller diameter. The gear 92 that meshes withthe gear 91 is accordingly mounted on a lever arm 98 which is free on the stud shaft of the gear 93, and clampable in adjusted positions by means of a bolt 99 taking into the end frame 13 in a manner similar to that described in connection with the adjustment of the lever arms 35 of the pump actuating transmissions 26.

The function of governing the cycle periods of the machine, I vest in a timing mechanism which includes a double armed master lever 100. In a manner presently explained, this master lever 100 is coordinated with the speed regulating instrumentalities of the two variable speed units, 77, 77a and subject to the control of a heart shaped ro- As shown, the lever 100 is fulcrumed medially of its ends on a stud 102 sustained by a fixed bracket 103, and its lower extremity is fitted with a roller 104 to engage with the periphery of the cam 101, the latter being secured on an axis 105 with journal support in a fixed bearing 106. The roller 104 is maintained in engagement with the cam 101 through the influence of a weight 107 at tached to the free end of a cord or cable 108, which, after passing about a directional sheave 109, has its other end connected to the upper extremity of the master lever 100. Reaching horizontally from swivel shafts 110, 111 journalled in bearings 112, 113 afforded by the frames 78, 78a of the variable speed units 77, 77a, are arms 114, 115 with ball ends engaging bifurcations respectively of the upper and lower extremities of the master lever'100. To the top ends of the swivel shafts 110, 111 are secured toggle levers 116, 117 which are respectively coupled by means oflinks 118, 119 with the regulating levers 84, 85 and 84a, 85a of the two variable speed units 77, 77a. In order that the maximum and minimum speeds imparted through the variable speed units 77, 77a to the spools 41, 42 may be accurately determined, I make provisions whereby the swivel shafts 110, 111 may be angular-1y adjusted relative to the arms 114,115. The means to this end comprises supplemental arms 120, 121 which are fixed to the lower ends of the swivel shafts 110, 111 and respectively carry set screws 120a,, 121a adapted to bear against opposite sides of the arms 114, l15.- In a manner similar to that described with reference to the spinning units 19 and the van'able speed units 77, 77a the rotary timing cam 101 is driven from the main shaft 27 of the machine through a transmission 1.22, at a very greatly reduced speed however as compared with the other mechanisms mentioned. Referring to Fig. III, it will be observed. that the speed reduction transmission 122 comprises a worm wheel 123 fast on the shaft 105 with the rotary cam 101 and meshing with a worm 124 on a vertical shaft 125, the latter having journal support in a bearing 126 afforded by the frame 13. The vertical shaft receivesmotion, through a pair of miter plnions 127, from a short stud shaft 128 with a wheel 129 thereon arranged to be driven by a worm 130 on a horizontal countershaft 131. This counter-shaft 131 rotates in a fixed bearing 132 and is fitted at the end opposite 115 Mounted on the stud 120 the machine may be altered by interchanging the 125 gear wheel 138 for others of larger or smaller diameter, the intermeshing gear wheel 137 being accordingly mounted on an adjustable arm 142.

The operation of the machine is as follows: Assuming the machine to be in motion with the heart shaped cam 101 rotating in the direction of the arrow in Figs. III and VII, the master control lever 100 is slowly moved counter-clockwise against the pull of the weight 107, with impartation of correspondingly slow movement in opposite directions, to the arms 114, 115 with which said lever is engaged. Accordingly, the regulating levers 84, 85 of the variable speed unit 77 embodied in the mechanism 75, are swung relatively to bring about lateral expansion of the pulley 79 and proportionate lateral contraction of the pulley 80, so that the speed of the line shaft 48 and the winding spools 41 served by it, is gradually increased; while the levers 84a, 85a of the unit 77a are swung contrarily to bring about concurrent contraction of the pulley 79a and pros portionate expansion of the pulley 80a with attendant uniform deceleration of the line shaft 49 serving the spools 42. In this way, a definite surface speed is determined for the winding spools 41 I tion in spinning yarns proportionate to the growth of the yarns Y on them, so that the pull or tension on said yarns is kept uniform to preclude any irregularities in the gage. The empty spools 42 on the other hand, are made ready to take the place of the winding spools 41 when the latter are filled, the end of the current cycle of the machine occurring as the high point on the rotary cam 101 passes the roller 104 on the master control lever 100 at which time the operative simply throws the yarns Y over from the full spools 41 to the empty spools 42 by a rapid finger movement incident to walking around the machine, and vice versa. The yarns Y being moist, cling readily to the empty spools 42, for instance, and are thus obliged to follow the motion of the latter in initiating a new winding operation. As the cam 101 completes its revolution, the action of the two variable speed units 77, 77a of the mechanism is reversed, that is to say: the spools 41 are uniformly decelerated concurrently with acceleration of the spools 42. If the gage of the yarns Y is to altered, this may be accomplished by interchange of the gear 32 in the transmissions 26 by which the spinning units 19 are operated, as already stated hereinbefore. To suit the new condition thus brought about, the gear wheel 138 of the transmission 122 actuating the heart shaped cam 101, may be changed for another to vary the cycle period of the machine. Or again, the cycle period may obviously be varied without altering the delivery rate of the rayon depending upon the amount of yarn Y which is to be wound on the spools 41, 42. Also, by the provisons made for altering the ratio of the transmission gearing 90, the drive of the variable speed units '77, 77a may be altered either independently of, or in coordination with changes in the ratios of the transmissions 26 and 122 which respectively drive the spinning units 19 and the timing cam 101. It will be remembered that it is also possible to predetermine the maximum and minimum speed limits of the variable speed units '77, 77a by angularly adjusting the swivel shafts 110, 111

- relative to the arms 114, 115 through proper setting of the screws 120a, 121a in the supplemental arms 120, 121.

From the foregoing it will be seen that my improved machine lends itself readily to adapta- Y of different gages with absolute assurance as to uniformity of the product.

In order to facilitate removal of the filled spool 41 or 42 from the machine, I have made provisions whereby the line shafts 48, 49 may be temporarily idled, the means for this purpose including clutches 145, 146 which are independently'shiftable by crank handles 147, 148 at opposite sides of the machine. As shown in Figs. I, and VI, the handles 147, 148 are connected to the ends of transversely extending actuating shafts 149, 150 for the clutches 145, 146.

For convenience in setting the timing cam 101, I fit a crank handle 151 to the shaft 128 of the gear 129 embodied in the transmission 122, as shown in Figs. I and III, and provide a clutch with a slide member 152 whereby the worm wheel 123 may be temporarily disconnected from the shaft 128 to enable the setting to be accomplished.

Having thus described my invention, I claim:

1. In a rayon spinning machine embodying means for converting cellulose into yarn, and a pair of spools adapted to be alternately employed in taking up the yarn as it is formed; variable speed means with independently regulatable units individual to the spools, and master control means common to said regulatable units and functional to govern, between predetermined speed limits over a definite time period, uniform deceleration of the active spool compensatively with growth of the yarn thereon, and corresponding acceleration of the currently idle spool in preparation for its ultimate substitution.

2. In a rayon spinning machine embodying means for converting cellulose into yarn, and a pair of spools adapted to be alternately employed in taking up the yarn as it is formed; variable speed means with independently regulatable units individual to the spools, a master control means common to said regulatable units and functional to govern, between predetermined speed limits over a definite time period, uniform deceleration of the active spool compensatively with growth of the yarn thereon, and corresponding acceleration of the currently idle spool in preparation for its ultimate substitution, and means whereby the drive of the governing means may be changed to alter the timing of the machine cycle.

3. In a rayon spinning machine embodying means for converting cellulose into yarn, and a pair of spools adapted to be alternately employed in taking up the yarn as it is formed; regulatable variable speed means individual to the spools, a master governing means for said regulatable speed means functional to concurrently efiect, between predetermined speed limits over a definite time period, uniform deceleration of the active spool compensatively with growth of the yarn thereon, and corresponding acceleration of the idle spool in preparation for its ultimate substitution, and means whereby the variable speed means aforesaid may be individually adjustedin determining different maximum and minimum speed limits for the spools.

4. In a rayon spinning machine embodying means for converting cellulose into yarn, and a pair of spools adapted to be alternately employed in taking up the yarn as it is formed; regulatable variable speed means with units individual to the spools, a master control lever coordinating said variable speed means, and means for actuating the master lever to eifect between predetermined limits over a definite time period, uniform deceleration of the active spool compensatively with growth of the yarn thereon, and, at the same time, corresponding acceleration of the currently idle spool in preparation for its ultimate substitution.

5. In a rayon spinning machine embodying means for converting cellulose into yarn, and a pair of spools adapted to be alternately employed in taking up the yarn as it is formed; regulatable variable speed means with units individual to the spools, a master control lever coordinating said variable speed means, and a rotary cam for actuating the master control lever to effect, between predetermined limits over a definite time period, deceleration of the active spool compensatively with growth of the yarn thereon, and, at the same time, corresponding acceleration of the currently idle spool in preparation for its ultimate substitution.

6. In a rayon spinning machine embodying means for converting cellulose into yarn, and a pair of spools adapted to be alternately employed in taking up the yarn as it is formed; regulatable variable speed means with units individual to the spools, a master control lever coordinating said variable speed-means, means for actuating the lever to effect between predetermined speed limits over a definite time period, uniform deceleration of the active spool compensatively with growth of the yarn thereon, and, at the same time, corresponding acceleration of the currently idle spool in preparation for its ultimate substitution, and connections between the variable speed means and the master control lever capable of adjustment to predetermine maximum and minimum speed limits for the spools.

7. In a rayon spinning machine embodying means to deliver cellulose for conversion into yarn, and a pair of spools adapted to be alter nately employed in taking up the yarn as it is formed; variable speed means capable of decelerating the active spool compensatively with growth of the yarn thereon and, at the same time, of accelerating the currently inactive spool in preparation for its ultimate substitution, and vice versa, timing means for controlling the variable speed means to repeatedly perform as aforesaid, means whereby the delivery by the cellulose delivery means may be varied, and means whereby the variable speed means may be correspondingly adjusted in predetermining different maximum and minimum speed limits of the spools in accordance with the gage of the yarn which is to be produced and the amount to be wound on said spools.

3. In a rayon spinning machine embodying means for converting cellulose into yarn, and a pair of spools adapted to be alternately employed in taking up the yarn as it is formed; variable speed means capable of decelerating the active spool compensatively with growth of the yarn thereon, and, at the same time, of accelerating the currently inactive spool in preparation for its ultimate substitution, and vice versa, timing means for controlling the variable speed means to repeatedly perform as aforesaid and a transmission for the timing means aforesaid including components capable of interchange to vary the cycle period of the machine.

9. In a rayon spinning machine embodying means to deliver cellulose for conversion into yarn, and a pair of spools adapted to be alternately employed in taking up the yarn as it is formed; variable speed means capable of decelerating the active spool compensatively with growth of the yarn thereon, and, at the same time, of accelerating the currently inactive spool in preparation for its ultimate substitution, and vice versa, timing means for controlling the variable speed means to repeatedly perform as aforesaid, and separate transmissions for said variable speed means and timing means with components capable of interchange to alter the cycle period of the machine and the winding rate of the spools.

10. In. a rayon spinning machine embodying means to deliver cellulose for conversion into yarn, and a pair of spools adapted to be alternately employed in taking up the yarn as it is formed; variable speed means capable of decelerating the active spool compensatively with growth of the yarn thereon, and of concurrently accelerating the inactive spool in preparation for its ultimate substitution, and vice versa, timing means for controlling the variable speed means to repeatedly perform as aforesaid, and separate transmissions for the cellulose delivery means, the variable speed means and the timing means each embodying components capable of interchange to vary the delivery rate of the cellulose and to correspondingly vary the actuation of the 105 variable speed means and the timing means in accordance with the gage of the yarn to be produced and the amount to be wound on the spools.

11. In a'rayon spinning machine, two spools to be used in alternation to receive the spun thread, no two change-speed transmission devices one to be connected to one and the other to the other spool, and controlling means to automatically decrease the speed of one and to simultaneously therewith increase the speed of the other transmission device.

JOHN JOSEPH SIPPEL.

Images