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NO120297B - - Google Patents

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Publication number
NO120297B
NO120297B NO170277A NO17027767A NO120297B NO 120297 B NO120297 B NO 120297B NO 170277 A NO170277 A NO 170277A NO 17027767 A NO17027767 A NO 17027767A NO 120297 B NO120297 B NO 120297B
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NO
Norway
Prior art keywords
microphone
transformer
call
transistor
amplifier
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Application number
NO170277A
Other languages
Norwegian (no)
Inventor
W Streets
Original Assignee
Phillips Petroleum Co
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Application filed by Phillips Petroleum Co filed Critical Phillips Petroleum Co
Publication of NO120297B publication Critical patent/NO120297B/no

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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/16Hydrocarbons
    • C10L1/1625Hydrocarbons macromolecular compounds
    • C10L1/1633Hydrocarbons macromolecular compounds homo- or copolymers obtained by reactions only involving carbon-to carbon unsaturated bonds
    • C10L1/1658Hydrocarbons macromolecular compounds homo- or copolymers obtained by reactions only involving carbon-to carbon unsaturated bonds from compounds containing conjugated dienes
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/02Well-defined aliphatic compounds
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/02Well-defined aliphatic compounds
    • C10M2203/022Well-defined aliphatic compounds saturated
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/02Well-defined aliphatic compounds
    • C10M2203/024Well-defined aliphatic compounds unsaturated
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/04Well-defined cycloaliphatic compounds
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/06Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing conjugated dienes

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Telephone Set Structure (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Description

Transportabelt telefonapparat. Portable telephone set.

Denne oppfinnelse vedrører transpor-table telefonapparater og befatter seg særlig med et transportabelt telefonapparat med lokalbatteri og transformator, for anvendelse i mottale- eller mottaleanlegg med likeberettigete deltakerstasjoner (felttele-fonanlegg), hvor det på transformatorens inngangsside er anbragt såvel en i og for seg kjent batteriløst arbeidende mikrofon som en av lokalbatteriet matet transistor-forsterker. This invention relates to transportable telephone sets and deals in particular with a transportable telephone set with a local battery and transformer, for use in reception or reception systems with equally entitled participant stations (field telephone systems), where on the input side of the transformer there is placed as well as a well-known battery-free working microphone as a transistor amplifier fed by the local battery.

Ved oppfinnelsen skal det skaffes et slikt transportabelt telefonapparat av særlig liten vekt og med lavt plassbehov, som ved en enkel konstruktiv og koblingsmes-sig oppbygning samtidig sikrer en høy kvalitet for lydgjengivelsen og dessuten man-gesidig anvendelsesmulighet. With the invention, such a transportable telephone device of particularly light weight and with low space requirements is to be provided, which, by means of a simple constructive and connecting structure, at the same time ensures a high quality of sound reproduction and, moreover, versatile application possibilities.

For å oppnå dette, er et transportabelt telefonapparat av den nevnte art oppbyg-get slik ifølge oppfinnelsen, at forsterkeren ved hjelp av en anropstast kan omkobles til lydfrekvensgenerator for å frembringe en anropsstrøm, ved at det i transformatoren forefinnes en ekstra tilbakekoblingsvikling, som over anropstasten kan kobles parallelt med mikrofonen og at samtidig det anropsslgnal som frembringes ved tilbakekoblingen blir akustisk hørbart i den mikrofon som ligger i tilbakekoblingssløy-fen. In order to achieve this, a transportable telephone set of the aforementioned type is constructed in such a way according to the invention that the amplifier can be switched to a sound frequency generator by means of a call button to produce a call current, by the fact that there is an additional feedback winding in the transformer, which is above the call button can be connected in parallel with the microphone and that at the same time the call signal produced by the feedback becomes acoustically audible in the microphone located in the feedback loop.

Anvendelsen av en batteriløst arbeidende mikrofon i forbindelse med en transistor forsterker er i og for seg kjent for andre formål. Det er likeledes i og for seg kjent å bruke en transistor forsterker som vekselstrømsgenerator. Endelig har man ved stasjonære vekseltaleanlegg også tidligere omkoblet den tilstedeværende forsterker til en lydfrekvensgenerator for å frembringe et lydfrekvent signal. The use of a battery-free working microphone in connection with a transistor amplifier is in itself known for other purposes. It is likewise known per se to use a transistor amplifier as an alternating current generator. Finally, with stationary PA systems, the existing amplifier has also previously been switched to an audio frequency generator in order to produce an audio frequency signal.

Ved den særlige kombinasjon ifølge oppfinnelsen av de nevnte i og for seg kjente foranstaltninger, og utnyttelsen av transformatoren for omkobling av transi-storforsterkeren til en anropsstrømgenera-tor slik at en ekstra tilbakekoblingsvikling kobles parallelt med mikrofonen ved forsterkerens inngang, er det imidlertid lyk-kes å utforme et transportabelt telefonapparat med så stor senkning av vekten at «dette tidligere ikke var trodd mulig, og samtidig med høy kvalitet på lydover-føringen, idet den særlige måte til å oppnå omkobling, hvor den elektroakustiske omformer under anropskobling er innkoblet i tilbakekoblingssløyfen, gir den ytterligere fordel at det avgitte anropssignal kan hø-res i den elektroakustiske omformer i den egne stasjon. Dette er av forskjellige grun-ner ønskelig, særlig ved anvendelse av an-legget ifølge oppfinnelsen til telegrafering. Bruksområdet for telefonanlegget ifølge oppfinnelsen blir derved utvidet ytterligere. With the special combination according to the invention of the measures mentioned in and of themselves, and the utilization of the transformer for switching the transistor amplifier to a call current generator so that an additional feedback winding is connected in parallel with the microphone at the amplifier's input, it has, however, succeeded to design a transportable telephone device with such a large reduction in weight that "this was previously not thought possible, and at the same time with high quality of the sound transmission, as the special way to achieve switching, where the electroacoustic converter during call switching is connected in the feedback loop, gives the further advantage that the transmitted call signal can be heard in the electroacoustic converter in the own station. This is desirable for various reasons, particularly when using the plant according to the invention for telegraphing. The area of use for the telephone system according to the invention is thereby further expanded.

Oppfinnelsen vil nå bli beskrevet nær-mere i det etterfølgende under henvisning til de medfølgende tegninger, hvor det er vist endel utførelseseksempler for oppfinnelsen, og hvor: Fig. 1 viser koblingen for et telefonapparat for mottale ifølge oppfinnelsen. Fig. 2 viser en endret kobling for vek-seltale med forhøyet lydstyrke. Fig. 3 og 4 viser utførelseseksempler for oppbyggingen av et telefonapparat iføl-ge oppfinnelsen. The invention will now be described in more detail in what follows with reference to the accompanying drawings, in which some exemplary embodiments of the invention are shown, and where: Fig. 1 shows the connection for a telephone device for reception according to the invention. Fig. 2 shows a changed connection for alternating speech with increased volume. Fig. 3 and 4 show examples of the construction of a telephone set according to the invention.

I fig. 1 betegner l et batteri, 2 en bat-teriløst arbeidende mikrofon, 3 en telefon, 4 en transformator med viklingene 5, 6, 7, mens 8 betegner en tilbakekoblingsmot-stand, 9 en transistor, 10 og 11 spennings-delermotstander, 12 en anropstast, 13 og 14 ledningsklemme, og 15 innkoblingstasten. In fig. 1 denotes a battery, 2 a battery-less working microphone, 3 a telephone, 4 a transformer with windings 5, 6, 7, while 8 denotes a feedback resistor, 9 a transistor, 10 and 11 voltage divider resistors, 12 a call key, 13 and 14 cable clamp, and 15 the switch-on key.

Når der tales, arbeider mikrofonen 2, som for eksempel er elektromagnetisk i transistorens 9 inngang i en emitter-basis-kobling. Den spenningsdeler som dannes av motstandene. 10 og 11 sørger .for å frem-skaffe den riktige basisforspenning. Kol-lektar strøm men løper gjennom viklingen 5 i transformatoren 4. Den tilsvarende vik-ling 6 i transformatoren, telefonkapselen 3, tilbakekoblingsmotstanden 8 og den til led-ningsklemmene 13, 14 tilkoblete motstasjon danner en kjent utjevningskobling for å hindre henholdsvis nedsette sidetoner. When speaking, the microphone 2, which is for example electromagnetic, works in the input of the transistor 9 in an emitter-base connection. The voltage divider formed by the resistors. 10 and 11 provide the correct base bias. It collects current but runs through the winding 5 in the transformer 4. The corresponding winding 6 in the transformer, the telephone capsule 3, the feedback resistor 8 and the opposite station connected to the wire terminals 13, 14 form a known equalizing connection to prevent, respectively, reduced side tones.

Spenning og strøm for transistoren 9 er innstillet slik at denne i forbindelse med en tilsvarende ømfindtlig mikrofon 2 om-trent avgir den samme taleytelse til mot-stås j onen som en kullmikrofon. Ved påvirkning av anropstasten 12 kobles tilbake-koblingsviklingen 7 i transformatoren 4 til inngangen for transistortrinnet 9 parallelt med mikrofonen 2. Forsterkertrinnet be-gynner å oscillere og avgir over viklingene 5, 6 og ledningene 13, 14 en lydfrekvent spenning til den tilkoblete motstasjon. På selve talestedet høres anropslyden over mikrofonen 2, som på grunn av sin konstruk-sjon også virker som høretelefon..Dette er nødvendig, særlig ved telegrafering, fordi den egne telefon 3 som følge av sidetone-dempningskoblingen mottar ingen eller ba-re meget liten energi, og fordi det kan være ønskelig ved telegrafering å legge fra seg håndapparatet. Derimot blir det lydfre-kvente anrop hørt meget godt i telefonen på motstasjonen med samme byggemåte. Voltage and current for the transistor 9 are set so that, in connection with a correspondingly sensitive microphone 2, it emits approximately the same speech performance to the resistor as a charcoal microphone. When the call button 12 is pressed, the feedback winding 7 in the transformer 4 is connected to the input of the transistor stage 9 in parallel with the microphone 2. The amplifier stage begins to oscillate and transmits an audio-frequency voltage to the connected opposite station via the windings 5, 6 and the wires 13, 14. At the actual speaking location, the call sound is heard over the microphone 2, which due to its design also acts as a headphone. This is necessary, especially when telegraphing, because the own telephone 3, as a result of the side tone attenuation coupling, receives no or only very little energy, and because it may be desirable when telegraphing to put down the handset. In contrast, the audio-frequency call is heard very well in the telephone at the opposite station with the same design.

Batteristrømmen blir først tilkoblet etter påvirkning av innkoblingstasten 15 som fortrinnsvis er anbragt i håndapparatet. The battery current is only connected after the switch-on button 15 is activated, which is preferably located in the hand-held device.

I fig. 2 er det for tilsvarende deler brukt de samme betegnelser som i fig. 1. I tillegg dertil betegner 16 en sperrekon-densator, 17—20 fire kontakter i en taletast, som kan være kombinert med en gaf-felomkopler, 21 basis-formotstanden for transistoren, 22 en kombinert mikrotelefon. In fig. 2, the same designations as in fig. are used for corresponding parts. 1. In addition, 16 denotes a blocking capacitor, 17-20 four contacts in a voice key, which can be combined with a fork switch, 21 the base resistor for the transistor, 22 a combined microphone.

Koblingen ifølge fig. 2 bruker bare en akustisk omformer 22 som kombinert mikrotelefon. Som følge derav er bare veksel-tale, men ikke mottale mulig, hvorunder The connection according to fig. 2 uses only an acoustic transducer 22 as a combined microphone. As a result, only bill of exchange speech, but not receiving speech is possible, under which

både de avsendte og de ankomne tale-strømmer forsterkes i transistorforsterker-trinnet. Når man løfter opp håndapparatet fra gaffelen blir omkoblingskontakten 20 og omkoblingskontakten 18 påvirket av gaffelomkobleren, det vil si blir bragt i den stilling som er vist i fig. 2. Taletasten og gaffelomkobleren danner fortrinnsvis en mekanisk enhet. Man kan utforme den kombinerte taletasten og gaffelomkobleren således at den har en innsneppende hvile-stilling og to arbeidsstillinger henholdsvis for dytting og for tale, idet bryteren trykkes mot fjærkraft til talestilling, og etter å være sluppet, fjærer tilbake i hørestilling. I denne hørestilling, som er vist i fig. 2, ligger viklingen 5 på transformatoren 4 i inngangskrétsen for den i en emitter-basis-kobling drevne transistor 9 og en mikrotelefon 22 i kollektorkretsen. Derved blir de innkommende talestrømmer forsterket gjengitt i mikrotelefonen 22. Transistoren får over formotstanden 21 den riktige basisforspenning. Når man skal tale, trykker man ned taletasten, hvorved alle fire kontaktene 17 til 20 på tegningen legges om fra den opptegnete stilling til den annen arbeidsstilling. Nå virker mikrotelefonen 22 som mikrofon over kontaktene 20 og 19 i transistoirnngangen, og transformatorvik-lingen 5 ligger i kollektorkretsen. De for-sterkete talestrømmer flyter da over viklingen 6 i transformatoren 4 og over led-ningsklemmene 13, 14 til motstasjonen (ikke opptegnet). For å -avgi et lydfrekvent anropssignal, kobles transformatorviklin-gen 7 ved påvirkning av anropstasten 12 parallelt med mikrotelefonen for å oppnå tilbakekobling av transistortrinnet. Derved frembringes det et lydfrekvent signal, uav-hengig av hvorvidt stasjonen er koblet på tale eller på lytting, da det for å oppnå at transistortrinnet oscillerer ikke kommer an på hvorvidt tilbakekoblingsviklin-gen 7 ligger i forsterkerens inngang eller dens utgang. Anropssignalet kan også hø-res i mikrotelefonen 22, og ved passende dimensjonering av viklingene 5 og 7 er det mulig å oppnå forskjellige lydstyrker, alt etter anropstastens stilling. both the sent and the arrived speech streams are amplified in the transistor amplifier stage. When you lift the handpiece from the fork, the change-over contact 20 and the change-over contact 18 are affected by the fork switch, that is to say are brought into the position shown in fig. 2. The speech key and the fork switch preferably form a mechanical unit. The combined speech key and fork switch can be designed in such a way that it has a snap-in rest position and two working positions respectively for pushing and for speaking, as the switch is pressed against spring force to the speaking position, and after being released, springs back to the listening position. In this listening position, which is shown in fig. 2, the winding 5 of the transformer 4 is located in the input circuit for the transistor 9 operated in an emitter-base connection and a microphone 22 in the collector circuit. Thereby, the incoming voice currents are amplified and reproduced in the microphone 22. The transistor receives the correct base bias via the resistor 21. When you want to speak, you press the speak key, whereby all four contacts 17 to 20 in the drawing are switched from the recorded position to the other working position. Now the microphone 22 acts as a microphone over the contacts 20 and 19 in the transistor input, and the transformer winding 5 is located in the collector circuit. The amplified voice currents then flow over the winding 6 in the transformer 4 and over the cable terminals 13, 14 to the opposite station (not shown). In order to emit an audio-frequency call signal, the transformer winding 7 is connected when the call key 12 is actuated in parallel with the microphone to achieve feedback of the transistor stage. Thereby, an audio frequency signal is produced, regardless of whether the station is connected to speech or to listening, since to achieve that the transistor stage oscillates it does not depend on whether the feedback winding 7 is located in the amplifier's input or its output. The call signal can also be heard in the microphone 22, and by suitable dimensioning of the windings 5 and 7 it is possible to achieve different volume levels, depending on the position of the call button.

Den kobling som er vist i fig. 2 med bare en akustisk omformer 22 gjør det mulig å bruke et håndapparat, som Innehol-der en kombinert tale- og hørekapsel enten bare på talesiden eller på lyttesiden ved at lyden føres over en akustisk ledning fra munnen til kapselen eller fra kapselen til øret. I det første tilfelle er det mulig å bruke en taletrakt med akustisk forsterk-ning. The connection shown in fig. 2 with only an acoustic converter 22 makes it possible to use a hand-held device, which contains a combined speech and hearing capsule either only on the speaking side or on the listening side by the sound being carried over an acoustic wire from the mouth to the capsule or from the capsule to the ear. In the first case, it is possible to use a speech funnel with acoustic amplification.

Fig. 3 viser et forenklet utførelsesek-sempel på dette hvor telefonapparatet er vist i lengdesnitt. I fig. 3 betegner 22 den kombinerte mikrotelefon, 23 membranen for mikrotelefonen, 24 øreplaten, 25 hoved-huset for håndapparatet, 1.2 anropstasten og 26 den kombinerte taletast og gaffel-omkobler som påvirker kontaktene 17 til 20 (fig. 2), 27 betegner den lydkanal som der tales inn i, og 28 forsterkerrommet som tjener til å oppta transistoren 9 og de andre kobldngselementer. Ved denne utførelse kommer lyden over den traktformige, lyd-forsterkende lydkanal 27 inn mot baksiden av den kombinerte mikrotelefon 22, og inn-virker der på membranens 23 bakside. Mikrotelefonen, som for eksempel ban være en dynamisk eller elektromagnetisk mikrofon eller en krystallmikrofon, avgir en spenning som forsterkes i forsterkerenhe-ten som er anbragt i forsterkerrommet 28, og føres deretter til ledningene, hvis tilkob-linger ikke er inntegnet. Når man lytter, kommer lyden fra fremsiden av membranen 23 i mikrotelefonen gjennom hullene i ørekapselen 24 og derfra til øret. Anropstasten 12 og omkobleren 26 påvirker kontaktene som er anbragt i forsterkerrommet 28, og som heller ikke er tegnet inn i fig. 3. Omkoblerne 12 og 26 er plasert slik at de lett kan påvirkes med de frie fingrer på den hånd som holder 'apparatet. Et ankom-mende anrop til apparatet sendes ut fra forsiden og baksiden av membranen 23 og forsterkes akustisk i lydkanalen 27. Fig. 3 shows a simplified design example of this, where the telephone set is shown in longitudinal section. In fig. 3 designates 22 the combined microphone, 23 the membrane for the microphone, 24 the ear plate, 25 the main housing for the handset, 1.2 the call key and 26 the combined voice key and fork switch which affects contacts 17 to 20 (fig. 2), 27 denotes the sound channel which there is spoken into, and 28 the amplifier room which serves to accommodate the transistor 9 and the other connecting elements. In this embodiment, the sound comes over the funnel-shaped, sound-amplifying sound channel 27 towards the back of the combined microphone 22, and there acts on the back of the membrane 23. The microphone, which may for example be a dynamic or electromagnetic microphone or a crystal microphone, emits a voltage which is amplified in the amplifier unit which is placed in the amplifier room 28, and is then fed to the wires, the connections of which are not drawn. When listening, the sound comes from the front of the diaphragm 23 in the microphone through the holes in the ear capsule 24 and from there to the ear. The call button 12 and the switch 26 affect the contacts which are placed in the amplifier room 28, and which are also not drawn in fig. 3. The switches 12 and 26 are positioned so that they can be easily influenced with the free fingers of the hand holding the device. An incoming call to the device is sent out from the front and back of the membrane 23 and is acoustically amplified in the sound channel 27.

Dersom mikrotelefonen 22 plaseres ved munnsiden på håndapparatet, kan øredelen av håndapparatet utføres spesielt flatt, slik at den eventuelt kan skyves inn under en stålhjelm. Fig. 4 viser et forenklet snitt gjennom et håndapparat av denne utform-ing. Lydkanalen 27 fører her den mottatte lyd, som stråler ut fra membranens bakside, hen til øret, idet lydhullene i lydka-nalens avsluttende vegg slipper lyden gjennom. Man ser nå tydelig hvor flatt man kan forme den øvre del av håndapparatet, som følge av at man ikke bruker noen hø-rekapsel. Forøvrig er plaseringen av for-sterkerenheten og anbringelsen av tastene helt lik den som er vist i fig. 3. Forskjellen er bare at man taler direkte Inn mot den kombinerte mikrotelefon 22 gjennom hullene 1 talekapselen 30. If the microphone 22 is placed at the mouth side of the hand-held device, the ear part of the hand-held device can be made especially flat, so that it can possibly be pushed under a steel helmet. Fig. 4 shows a simplified section through a handheld device of this design. The sound channel 27 here carries the received sound, which radiates from the back of the membrane, to the ear, as the sound holes in the closing wall of the sound channel let the sound through. You can now clearly see how flat the upper part of the handpiece can be shaped, as a result of not using a hearing capsule. Otherwise, the placement of the amplifier unit and the arrangement of the keys is exactly the same as that shown in fig. 3. The only difference is that you speak directly into the combined microphone 22 through the holes 1 of the speech capsule 30.

Oppbyggingen av et telefonapparat ifølge oppfinnelsen kan velges anderledes, for eksempel kan man velge hvorvidt man vil anbringe alle delene i håndapparatet slik som det er vist i fig. 3 og 4, eller om man vil anbringe forsterkerdelene og til-knytningsklemmene i et særskilt hus eller i en bærevæske, som da også kan oppta det separate håndapparat. The structure of a telephone device according to the invention can be chosen differently, for example one can choose whether to place all the parts in the handset as shown in fig. 3 and 4.

Claims (1)

Transportabelt telefonapparat med lokalbatteri og transformator, for anvendelse i mottale- eller vekseltaleanlegg med like-berettlgete deltakerstasjoner (felttelefon-anlegg), hvor det på transformatorens (4) inngangside er plasert både en i og for seg kjent batteriløst arbeidende mikrofon (2) og en fra lokalbatteriet (1) matet transistor forsterker (9), karakterisert ved at forsterkeren ved hjelp av en anropstast (12) kan omkobles til lydfrekvensgenerator for å frembringe en anropsstrøm ved at det i transformatoren (4) forefinnes en ekstra tilbakekoblingsvikling (7) som over anropstasten (12) kan kobles parallelt med mikrofonen (2) i inngangen for transistoren (9) og at samtidig det anropssignal som frembringes ved tilbakekoblingen blir akustisk hørbart i mikrofonen som ligger i tilbake-koblingssløyfen.Transportable telephone device with local battery and transformer, for use in receiving or switching systems with equally entitled participant stations (field telephone systems), where both a battery-less working microphone (2) known per se is placed on the input side of the transformer (4) and a transistor amplifier (9) fed from the local battery (1), characterized in that the amplifier can be switched to a sound frequency generator by means of a call button (12) to generate a call current by the transformer (4) having an additional feedback winding (7) as above the call button (12) can be connected in parallel with the microphone (2) in the input of the transistor (9) and that at the same time the call signal produced by the feedback becomes acoustically audible in the microphone located in the feedback loop.
NO170277A 1966-11-21 1967-10-25 NO120297B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US595614A US3419365A (en) 1966-11-21 1966-11-21 Petroleum distillates containing butadiene-styrene copolymers

Publications (1)

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NO120297B true NO120297B (en) 1970-09-28

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NO170277A NO120297B (en) 1966-11-21 1967-10-25

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US (1) US3419365A (en)
AT (1) AT276603B (en)
BE (1) BE706751A (en)
DE (1) DE1645780A1 (en)
DK (1) DK129094B (en)
ES (1) ES345724A1 (en)
FI (1) FI49316C (en)
GB (1) GB1205594A (en)
NL (2) NL6715720A (en)
NO (1) NO120297B (en)
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Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3479278A (en) * 1967-06-07 1969-11-18 Phillips Petroleum Co Solvent dewaxing with hydrogenated polymeric dewaxing aids
US3807975A (en) * 1968-10-23 1974-04-30 Standard Oil Co Middle distillate fuel oil compositions having improved pumpability
US3635685A (en) * 1969-07-24 1972-01-18 Phillips Petroleum Co Pour point depressant
GB1370093A (en) * 1970-11-13 1974-10-09 Shell Int Research Lubricant compositions containing a viscosity index improver
US3883319A (en) * 1973-11-23 1975-05-13 Monsanto Co Fire resistant jet fuel compositions
GB1575449A (en) * 1976-04-02 1980-09-24 Exxon Research Engineering Co Hydrogenated tapered-block copolymers of conjegated dienes and vinyl aromatic are useful as oil additives
US4145298A (en) * 1977-08-22 1979-03-20 Phillips Petroleum Company Hydrogenated lithiated copolymers grafted with organic nitrogen compounds as viscosity index improvers having dispersant properties
US4238202A (en) * 1979-08-31 1980-12-09 Phillips Petroleum Company Hydrocarbon fuels with carburetor detergent properties
USRE32533E (en) * 1979-08-31 1987-10-27 Phillips Petroleum Company Hydrocarbon fuels with carburetor detergent properties
US4412087A (en) * 1981-12-16 1983-10-25 Phillips Petroleum Company Viscosity index improver with high thickening power
US4418234A (en) * 1981-12-16 1983-11-29 Phillips Petroleum Company Viscosity index improver soluble in synthetic poly(α-olefin) lubricants
US4851476A (en) * 1987-07-27 1989-07-25 Shell Oil Company Functionalized polymers and process for modifying unsaturated polymers
US4970265A (en) * 1989-03-27 1990-11-13 Shell Oil Company Functionalized polymers and process for modifying unsaturated polymers
US5089028A (en) * 1990-08-09 1992-02-18 Mobil Oil Corporation Deposit control additives and fuel compositions containing the same
US5310490A (en) * 1991-03-13 1994-05-10 Exxon Chemical Products Inc. Viscosity modifer polymers
US5310814A (en) * 1991-03-15 1994-05-10 Exxon Chemical Patents Inc. Viscosity modifier polybutadiene polymers
EP0673990A1 (en) * 1994-03-22 1995-09-27 Shell Internationale Researchmaatschappij B.V. Hydrocarbon oil compositions having improved cold flow properties
US5906665A (en) * 1995-09-26 1999-05-25 General Technology Applications, Inc. High molecular weight fuel additive
US6303550B1 (en) * 1998-11-06 2001-10-16 Infineum Usa L.P. Lubricating oil composition
DE10333043A1 (en) * 2003-07-21 2005-03-10 Clariant Gmbh Fuel oil additives and additive fuel oils with improved cold properties
US20060052255A1 (en) * 2004-09-07 2006-03-09 The Lubrizol Corporation, A Corporation Of The State Of Ohio Aromatic diblock copolymers for lubricant and concentrate compositions and methods thereof
CN104624236B (en) * 2013-11-12 2017-02-15 中国石油化工股份有限公司 Hydrogenation catalyst for olefine unsaturated bond containing polymer, preparation method and hydrogenation reaction method thereof
WO2017127071A1 (en) * 2016-01-20 2017-07-27 Viscon Usa Llc Methods of increasing the heating value of fuel

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2798853A (en) * 1954-05-27 1957-07-09 Exxon Research Engineering Co Lubricant containing hydrogenated liquid polymer oils
GB848777A (en) * 1958-03-05 1960-09-21 Exxon Research Engineering Co Pour depressant for middle distillates
GB940143A (en) * 1960-05-05 1963-10-23 Atlantic Refining Co Liquid polymers from alpha-olefins
US3151957A (en) * 1962-02-13 1964-10-06 Sinclair Research Inc Hydrocarbon fuel composition of improved pour point
US3252772A (en) * 1962-11-15 1966-05-24 Sinclair Research Inc Fuel oil composition
US3271121A (en) * 1963-03-14 1966-09-06 Sinclair Research Inc Ethylene-styrene copolymer as pour point depressant

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FI49316B (en) 1975-01-31
AT276603B (en) 1969-11-25
DE1645780A1 (en) 1970-08-06
SE321598B (en) 1970-03-09
DK129094B (en) 1974-08-19
NL133183C (en)
ES345724A1 (en) 1969-01-16
NL6715720A (en) 1968-05-22
GB1205594A (en) 1970-09-16
FI49316C (en) 1975-05-12
US3419365A (en) 1968-12-31
BE706751A (en) 1968-05-20

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