US2133811A - Automatic printing telegraphy system - Google Patents

Automatic printing telegraphy system Download PDF

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US2133811A
US2133811A US9377336A US2133811A US 2133811 A US2133811 A US 2133811A US 9377336 A US9377336 A US 9377336A US 2133811 A US2133811 A US 2133811A
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means
currents
tape
printing
stepping
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William G H Finch
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William G H Finch
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Priority to US65869A priority Critical patent/US2047863A/en
Priority claimed from US6959636 external-priority patent/US2049169A/en
Priority to US7059136 priority patent/US2048604A/en
Priority to US7299136 priority patent/US2098802A/en
Priority to US7441936 priority patent/US2069061A/en
Priority to US8031336 priority patent/US2071227A/en
Priority claimed from US8271336 external-priority patent/US2100161A/en
Priority to US8690236 priority patent/US2145717A/en
Priority to US9377336 priority patent/US2133811A/en
Application filed by William G H Finch filed Critical William G H Finch
Priority to US11819136 priority patent/US2089846A/en
Publication of US2133811A publication Critical patent/US2133811A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/06Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface
    • H04N1/0671Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface with sub-scanning by translational movement of the main-scanning components
    • H04N1/0678Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface with sub-scanning by translational movement of the main-scanning components using a lead-screw or worm
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M11/00Telephonic communication systems adapted for combination with other electrical systems
    • H04M11/06Simultaneous speech and telegraphic or other data transmission over the same conductors
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00095Systems or arrangements for the transmission of the picture signal
    • H04N1/00103Systems or arrangements for the transmission of the picture signal specially adapted for radio transmission, e.g. via satellites
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/06Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/06Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface
    • H04N1/08Mechanisms for mounting or holding the sheet around the drum
    • H04N1/0886Mounting the sheet from a roll
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device
    • H04N1/36Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device for synchronising or phasing transmitter and receiver
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/19Gearing
    • Y10T74/19633Yieldability in gear trains
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/21Elements
    • Y10T74/2101Cams
    • Y10T74/2102Adjustable

Description

0t 1.8, 1938. w. G. H. F-1NcH AUTOMATIC PRINTING T111111111111111111- SYSTEMl 5 .ES-En- Original Filed June 24, 1956 Patented Oct. 18, 1938 UN-iran s TA-rl-:s

PATENr 2,133,811 OFFICE I AUTOMATIC PRINTING TELEGBAPHY SYSTEM william G. n. Einen, New York, N. Y. original application June 2 4, 193s, sel-m1 No.

86,902. Divided and a 193s, senil No. 93,11

this application yAugust 1,

, romains '(cl. 11a-4)' My invention. relates to telecommunication systemsand more .particularly relates vto novel apparatus for and methods of high speed automatic printing telegraph ,operation between remote points over telephone lines.

`This present invention is a continuation in part of my parent application Serial No.v 65,869, filed February 26, 1936, which matured into Patent No. 2,047,863 and is a division of my co-pending application Serial N6. 86,902, filed June 24, 1936.-

Modern high speed printing telegraph systems operate with a Baudot or ve unit code.- A continuous tape is successively punched with a predetermined combination of holes for each character. It is the practice to pass the tape through apparatus having five mechanical feelers which in turn operate contactors connected to contact plates on a mechanical distributor. chanical distributor, as is well known in the telegraphy art, comprises la rotating arm for suc cessively contacting the contact platesto transmit coded impulses in succession. The operation of mechanical distributors materially limits the speed of transmission of printing telegraph signals.

The printing telegraph systems employing I mechanical distributors either operate over a telegraph wire utilizing direct current energlzation or modulate a radio frequency carrier for transmitting the Isuccessive impulses of the coded combination to remote radio stations. For many commercial services, particularly news services, it is highly desirable to transmit to the main'oillce a message from as near to the scene of action as practicable. Various proposals have been.

made to utilize the vast telephone system network for rapid and economical and portable operation between the main dice and out in the field. None of the proposed systems for portably operating an automatic telegraphysystem over telephone lines have, to my knowledge, been successful, particularly since the telephone companies cannot permit any interconnection by a subscriber .to its lines unless special precautions and circuit balancing connections are used and a twenty-four hour 'per day lease is made. -The use of telegraph lines or radio systems for automatic telegraphy is not feasible 'for portable intercommunication with the main ofilce. In' accordance with my present invention, I contemplate ltransmitting the telegraphy Signals to the central oiiice from any telephone subscriber station. A telephone call is putthrough to the central otlice and the ltelegraph unit is operated on a pay-as-you-use basis. The principle of coupling to the ltelephone circuit without physical interconnection thereto forms the basis of the.

parent application hereinabove referred to. The electrical coupling resides in utilizing a solenoid in optimum coupling relationship with the inducsystem.

tion coil of the phone box, and a similar coupling v Aarrangement is employedat the receiving station. The companion application Serial No.`

86,902 discloses how the telegraphy signals may be used to modulate an audio carrier'irequency which is in turn transmitted to thecetralstation individually or with a multiplex carrier communication system wherein telepicture signals are simultaneously transmitted.` y

The Apresent invention resides in utilizing a plurality of individual tones or audio frequencies sufllciently spaced so that they may beindividually transmitted to correspond to the individual codedvcombinations of the Baudot or other veunit code, and received and selectively ltered at the receiving station to operate a suitable automaticprinting mechanism. The code combinations for each character" are transmitted simul-` A further object of. my invention is toprovide novel apparatus for and method of portable 'operation over a printing telegraph system employing telephone lines as the medium of transf mission and without physical interconnection thereto.

, These'and other objects of my invention will b ecome apparent in the following description taken in connection with the drawing which is a schematic electrical diagram :cfa preferred embodiment of a five-unit printing telegraph system 'operating over a'telephone line.

In carrying out my invention I employ an individual tone or audio frequency corresponding with a predetermined position of each impression of the coded combinations as punched in a paper ,tape. units which are variously combined v to form 'I'he well known Baudet code contains ve thirty-two characters in a manner well known in the art. A tape is generally punched with holes in ve rows corresponding to the particular character to be transmitted. The preparation of the punched tape, the character of the code combination or the number of -code units employed form no part of my present invention vand mayI -be varied in various ways. For purposes of illustration I use a :tive-unit code system.

The tape` lll is moved at a predetermined rate through the tape selecting mechanism Il by the stepping mechanism I2. The portion of the used tape I3 is shown dotted in rolled form within the stepping mechanism I2. The selector mechanism II contains iive mechanical Afeelers which operate contactors to electrically close corresponding circuits in accordance with the punchings of the perforated tape. Since such selecting mechanism is well known in the art, I have merely schematically illustrated the selector II by ve armatures I4 and corresponding contacts I5. It is to be understood that theelectrical circuit between any set of contacts I4-I5 is closed in accordance with the'actuation of the mechanical feelers in correspondence with the punchings on the perforated tape.

An individual tone generator is associated with each contactor set I4-I5 having, in one arrangement, the following spaced frequencies, 250

cycles, 600 cycles, 1000 cycles, 1500 cycles and 2200 cycles. AV primary winding I6 on the coupling transformer -I'I is used for each set of contactors and the associated tone generator. The

tone generator, the contactor vI4--I5 and the primary winding I6 of each set are respectively connected in series including a ground return Vcause corresponding induced tone signals in the secondary winding I8 'which are impressed'upon the amplier 20 through the compensation network I9. The signalsowing across secondary winding I8 represent different combinations of the audio frequency currents in accordance with the combinations on the perforated tape for the character being transmitted. After .a predetermined interval corresponding to theperiod for transmitting each character automatically stepping mechanism I2 will advance the tape one position to present to the selector mechanism the perforations for the next character to be transmitted and a corresponding combination of the plurality of tones will be induced upon secondary winding I8 rand be amplified and flow through the coupling solenoid 2|.

Contactors 22-23 illustrated in the stepping I mechanism I2 are Jactuated preferably between transmissions of each tape character during the advancement of the tape I0 through the selector'mechanism. Contactors 22-23 are accordingly connected once for each character transmitted to connect the 100 cycle tone generator to the primary winding 24 of the coupling transformer I 1. A 100 cycle signal of predeterinined duration will accordingly be induced across secondary winding I8 and ow through the solenoid 2l. The 100 cycle note impulse represents the stepping signal ,and printing impulse for the receiver station aswill be hereinafter described.

The printing telegraphy signals of my present invention are transmitted across the telephone line 25 'without physical interconnection thereto by the coupling solenoid 2| at the telephone sta-` tion 26`. The operator telephones from a nearby telephone station 26 and an operative connecferred to above. The optimum coupling Acondition of solenoid 2I is a coaxial alignment between solenoid 2I and induction coil 29. The printing telegraphy signals induced across the telephone line 25 ow through the induction coil 30 connected within the phone box 2I associated with the telephone receiving station 2'I. VA solenoid 32 is mounted upon the receiver phone box 3| in optimum coupling relationship with the induction coil30 therein. The solenoid 32 picksup the electromagnetic signals emanating from induction coil 30gand introduces them to the audio frequency amplifier 33. The output of amplifier 33 is connected to the primary Winding 34 of the receiver coupling transformer 35. The signals at the primary winding 34 correspond to the telegraphy signals at the secondary winding I8 of the transmitter coupling transformer I1. Where it is necessary to correct for a non-linear frequency characteristic of transmission between the transmitter transformer winding I8 and theireceiver transformer winding 34 a compensation network I9is .preferably introduced in the transmitter circuit as illus-` trated. The vcompensation network I 9 is designed in accordance with principles disclosed in the hereinabove referred to applications for smoothing out the frequency characteristic of transmission across the telephone system.

A plurality of secondary windings 36 on transformer 35 correspond to the primary windings I6 ofV transformer I1 and are respectively connectedto band-pass filter networks 31 for selectively passingpredetermined frequencies. Each filter is designed to pass only the particular frequency corresponding .to one of the tone transmitter generators. Accordingly, the lters 31 are correspondingly designed to transmit 250 cycles, 500 cycles; 1000 cycles, 1500 cycles, and 2200 cycles, corresponding to the predetermined positions of the code combination being transmitted from the perforated tape I0. The output of the filters 31 are connected V*to relay solenoids 38 which actuate corresponding relay armatures 39 operating upon corresponding contacts 4I). The relay contactors 38-48 are connected to an automatic printing mechanism 4I schematically indicated and well known inthe telegraphy art. The printingmechanism 4I prints characters upon a tape 42 advanced therethrough in accordance with the combinations of relay contactors 39-40 which are closed before each printing impulse. The particular combination of relay contactors 3 8-40 closed at any period corresponds exactlyto the selector contactors I4-I5 closedin accordance with the perforations on the tape III operating the mechanical feelers of the selecting mechanism II. 'I'he plurality of audio frequency currents transmitted across the telephone line predetermine the simultaneous the vrelay solenoids 38 and the secondary windings 36 causes only apredtermined frequency impulse'to actuate corresponding solenoids. 'I'he solenoids 38 preferably respond directly to the associated audio frequency tone but may well be direct current solenoids if a 'suitable rectifier is used in conjunction therewith. These rectiaisaeii said currents for electromagnetically inducing corresponding currents into one of said induction coils. j

\2. In-a signalling system operable. by a signal tape and extending over a telephone line having ers are preferably of the rugged mineral type when the stepping contactors 22-23 are connected between transmissions of the successive characters hereinabbve described. When the cycle note is cyclically transmitted, the relay contacts 46-41 are closed to correspondingly actuatethe receiver stepping mechanism 48 as well as producing a. printing impulse at the character upon the .tape-42 and also to reset the printer 4i and associated relay to be responsive to the next succeeding operation. The receiver stepping mechanism 48 is preferably ofthe electromagnetic type operated by relay 48--4'L The closure of relay 4'6-41 in response to the stepping impulse from the 100 cycle note is transmitted to the printer mechanism .4i by connection leads 49-50. The impulse across leads 49-58 actuates the printing and'resetting mechanism of the printer 4| in a manner well known in the art.

The automatic printing telegraphy system of my present invention functions by the transmission of a plurality of frequency impulsesl corresponding to' characters. to be transmitted. The signals are transmitted over a telephone system `without physical interconnection thereto pertactors for the stepping and printing impulses..

this separate signal may be dispensed with by sacricing one of the code combinations of the thirty-two and using it as the advance impulse at the end of each operation. Another method is to utilize a relay at the receiving station responsive to all code'l combinations transmitted,4

that'is, by eliminating thc selective filter -44 for .the advance relay 45 and employing a time delay mechanism so that the stepping and printing operations at the receiver will occur after a predetermined .interval following the reception of each code combination. i

My present invention may take other forms without departing from its spirit or scope and accordingly, Ido not intend to be limited except as set forth in the following claims.

I claim: f 1. Ina signalling system operable by a signal tape and extending over a telephone line having `a.' telephone box including an induction co'l at each end: means for generating an audio frequency current individual to each of the predetermined impulse Apositions of the signal tape, means for selecting combinations of said currents controllable by-said impulse positions; and means for transmitting said currents, across said telephone line comprising a solenoid connected to printing means.

a telephoneA box including an induction coil at each end: means for generating an audio frequency current individual to each oi' thev predetermined'iinpulse .positions o f the signal tape, means for selecting combinations of said currents controllable by said impulse positions corresponding to coded impulse combinations of characters to be transmitted; means for stepping said tape through said selecting means at a predetermined rate; and means for transmitting said currents across `said telephone line comprising a solenoid connected to said currents for electromagnetically inducing corresponding currents into one of said induction coils.

3. In a printing telegraphy system'ope'rable by a signal tape and extendingover a telephone line having a telephone box including an induction printing mechanism 4| to impress the selected;

determined impulse positions of the signal tape,

means for selecting combinations of said currents controllable by said impulse positions corresponding to coded impulse' combinations of 'characters to be transmitted; means for stepping said tape through said selecting. means at a predetermined rate, a stepping audio frequency current source cyclically transmittable during each stepping operation; and means for transmitting said cup- `rents across said telephone line comprising a.

solenoid connected to said currents for electromagnetically inducing corresponding currents into one of said induction coils.

`4:. In a signalling system operable by a signal tape and extending over a telephone line having a telephone box including an induction coil at each end: means forgenerating an audio frequency current individual to Ae'acli of the predetermined impulse positions of the signal tape,

. `means for selecting combinations of said currents controllable by said impulse positions; means for transmitting said currents across said telephone line comprising a solenoid connected to said currents for electromagnetically inducing corresponding currents into one of said induction coils; means for receiving said induced currents comprising a second solenoidfor coacting with the receivingstation induction coil; and printing means comprising local circuits individual to each of saidl frequency currents, means for electrically 4separating said received currents, individual to each of said local circuits forcondiicting predetermined frequency current impulses to -said 5. In a signalling system operable by a tape and extending over a telephone line having a telephone box including an induction coil at each end: means for generating an audio-fresignal A quency current individual to each of the prev determined impulse positions of the signal tape,

`means for selecting combinations of said currer.. ;s

saidtape through said'selecting means at a predetermined rate; means Vi'or transmitting said currents acrosssaid telephone line comprising a solenoid connected to said currents for 'electromagnetically inducing corresponding currents into one .of said inductioncoils; means for receiving said induced currents comprising a second solenoid forcoacting with the receiving station induction coil; and printing means comprising local circuits individual to each of said frequencycurrents, means for electrically separating said received currents, individual to each of said local circuits for conducting predetermined frequency. current impulses to said Yprinting means. y

6. In a printing telegraphy system operable by a signal tape and extending over a telephone line having a telephone box including an induction coil at each end: means for generating an audio frequency current individual to each of the predetermined impulse positions of the signal tape, meansfor selecting combinations of said currents controllable by said impulse positions correspondingY to coded impulse combinations oi.' characters to be transmitted; means for stepping saidttape through said selecting means at a predetermined rate, a stepping audio frequency current source cyclically transmittable during each stepping operation; means for transmitting said currents across said telephone line comprising a solenoid connectedto said currents for electromagnetically inducing corresponding currents into one of said induction coils; means for receiving said induced currents comprising a second solenoid for coacting with the receiving stationinduction' coil; and printing means com-- determined impulse positions of the signal tape,

means for selecting combinations of said currents controllable by said impulse positions; means for transmitting `said currents across said telephone line `comprising a solenoid connected to said currents for. electromagnetically inducing corresponding currents into one of; said induction coils and-arrangeable coaxially with said one induction coil; means for receiving` said induced currents comprising a `second solenoid for coacting with the receiving station induction coil; printing means comprising local circuits individual to each of said frequency currents, means for electrically separating said received currents,

mitting said currents across said telephone line I .comprising a. solenoid connected vto said currents for electromagneticaily inducing corresponding currents into one oi.' said induction coils and'arlrangeable coaxially with said one induction coil; meansfor receiving said inducedL currents comprising a second solenoid for coacting withthe receiving station induction coil; printing means comprising local circuits individual to each of said'frequency currents, lter means for electrically separating said received currents, individual to each of said local circuits for conducting predetermined` frequency current impulses totsaid printing means; and means responsive tofysaid stepping frequency current for impressing a selected character and resetting said printing means, f 9. In a printing telegraphy system operabl by' a signal tape and extending over a telephone line having a telephone box lincluding an induction coil at each end: means for generating signal tape, means for selecting combinations of said currents controllable by said impulse positions corresponding vto coded impulse combina,- tions of characters to be transmitted; means for stepping said tape througn said selecting means at a predetermined rate, a stepping audio frequency current source cyclically transmittable during each stepping operation; means for transmitting said currents across said telephone line comprising va solenoid connected to said currents for electromagnetically inducing corresponding currents into one of `said* induction coils; and a compensation network connected in said system for smoothing the" transmission frequency characteristic across s aid solenoids and said telephne lines. y

10. In a printing `t'elegraphy system operable by a signal tape and extending over a telephone line having a telephone box including an induction coil at each end: means for -generating an audio frequency current individual to each of the predetermined impulse positions of the signal tape, means for selecting combinations of v said currents controllable by said impulse posiindividualto each of said local circuits for 'conl ducting predetermined frequency current im. pulsesto said printing means; and means responsive to said stepping frequency. current for impressing a selected character and resetting said printing means.

8. In a printing teiegraphy system operable.

by a signal tapeand extending over a telephone line having a telephone box including an induction coil at each end: means for generating an audio frequency current individual to ea'ch 'of'the predetermined impulse positions of `the signal tape, means for selecting combinations .of said currents controllable by said impulse posi-` tions correspondingfto coded impulse combinal tions of characters to be transmitted; means for K stepping said tape throught said selecting means at a predetermined rate, a stepping audio frequency current source cyclically transmittable during each steppingl operation; means for transtions corresponding to coded impulse combinations of characters to be transmitted; means for stepping said tape through' said selecting means I at a predetermined rate. a stepping audio frequency current source cyclically transmittable during each stepping operation; means for trans- Amitting said currents across said'telephone line pulses to said printing means; means responsive to saidstepping frequency current for impressing a selectedY character and resetting said printing means; and a compensation network con- .nected in said system for smoothing the trans-v G. H. FiNcH.

US9377336 1936-02-26 1936-08-01 Automatic printing telegraphy system Expired - Lifetime US2133811A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US65869A US2047863A (en) 1936-02-26 1936-02-26 Telecommunications system
US7059136 US2048604A (en) 1936-02-26 1936-03-24 Electromagnetic coupling device
US7299136 US2098802A (en) 1936-02-26 1936-04-06 Telepicture synchronizing system
US7441936 US2069061A (en) 1936-02-26 1936-04-15 Synchronizing system
US8031336 US2071227A (en) 1936-02-26 1936-05-18 Portable telecommunications system
US8690236 US2145717A (en) 1936-02-26 1936-06-24 Multiplex telecommunication system
US9377336 US2133811A (en) 1936-02-26 1936-08-01 Automatic printing telegraphy system
US11819136 US2089846A (en) 1936-02-26 1936-12-30 Mechanical positive driving system

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
US6959636 US2049169A (en) 1936-02-26 1936-03-18 Sheet mounting mechanism
US7059136 US2048604A (en) 1936-02-26 1936-03-24 Electromagnetic coupling device
US7299136 US2098802A (en) 1936-02-26 1936-04-06 Telepicture synchronizing system
US7441936 US2069061A (en) 1936-02-26 1936-04-15 Synchronizing system
US8031336 US2071227A (en) 1936-02-26 1936-05-18 Portable telecommunications system
US8271336 US2100161A (en) 1936-02-26 1936-06-01 Telepicture translating mechanism
US8690236 US2145717A (en) 1936-02-26 1936-06-24 Multiplex telecommunication system
US9377336 US2133811A (en) 1936-02-26 1936-08-01 Automatic printing telegraphy system
US11819136 US2089846A (en) 1936-02-26 1936-12-30 Mechanical positive driving system

Publications (1)

Publication Number Publication Date
US2133811A true US2133811A (en) 1938-10-18

Family

ID=32046208

Family Applications (7)

Application Number Title Priority Date Filing Date
US7059136 Expired - Lifetime US2048604A (en) 1936-02-26 1936-03-24 Electromagnetic coupling device
US7299136 Expired - Lifetime US2098802A (en) 1936-02-26 1936-04-06 Telepicture synchronizing system
US7441936 Expired - Lifetime US2069061A (en) 1936-02-26 1936-04-15 Synchronizing system
US8031336 Expired - Lifetime US2071227A (en) 1936-02-26 1936-05-18 Portable telecommunications system
US8690236 Expired - Lifetime US2145717A (en) 1936-02-26 1936-06-24 Multiplex telecommunication system
US9377336 Expired - Lifetime US2133811A (en) 1936-02-26 1936-08-01 Automatic printing telegraphy system
US11819136 Expired - Lifetime US2089846A (en) 1936-02-26 1936-12-30 Mechanical positive driving system

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Application Number Title Priority Date Filing Date
US7059136 Expired - Lifetime US2048604A (en) 1936-02-26 1936-03-24 Electromagnetic coupling device
US7299136 Expired - Lifetime US2098802A (en) 1936-02-26 1936-04-06 Telepicture synchronizing system
US7441936 Expired - Lifetime US2069061A (en) 1936-02-26 1936-04-15 Synchronizing system
US8031336 Expired - Lifetime US2071227A (en) 1936-02-26 1936-05-18 Portable telecommunications system
US8690236 Expired - Lifetime US2145717A (en) 1936-02-26 1936-06-24 Multiplex telecommunication system

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US11819136 Expired - Lifetime US2089846A (en) 1936-02-26 1936-12-30 Mechanical positive driving system

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2512889A (en) * 1943-12-17 1950-06-27 Dreyfus Jean Albert Electroacoustic apparatus
US2620394A (en) * 1943-06-11 1952-12-02 Georges Valensi High-speed telegraphic system
US3084213A (en) * 1958-02-28 1963-04-02 Jerome H Lemelson Facsimile apparatus
US3609248A (en) * 1969-03-12 1971-09-28 Electrospace Corp Print out control circuit for telephone transaction system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640875A (en) * 1940-02-07 1953-06-02 Int Standard Electric Corp Facsimile telegraph transmitter
US2450030A (en) * 1942-05-05 1948-09-28 Western Union Telegraph Co Facsimile telegraph system and apparatus
US2649540A (en) * 1946-07-08 1953-08-18 John H Homrighous Multiplex radiophone communication system
US2536074A (en) * 1946-12-09 1951-01-02 Muncy James Henry One-way clutch and control therefor
US2630495A (en) * 1947-02-26 1953-03-03 Western Union Telegraph Co Phasing and synchronizing device for facsimile machines
US2543787A (en) * 1948-01-07 1951-03-06 Faximile Inc Double motor drive synchronizing system
US2578924A (en) * 1948-09-14 1951-12-18 Dictaphone Corp Inductive pickup device
US2554508A (en) * 1948-12-03 1951-05-29 Faximile Inc Control signal indicating circuit
US2775645A (en) * 1949-10-06 1956-12-25 Fakkeldij Johannes Jaco Joseph Apparatus for tapping telephone conversations for the purpose of recording
US2910159A (en) * 1955-04-22 1959-10-27 Borg Warner Clutch mechanism
US2901067A (en) * 1956-09-25 1959-08-25 Collins Radio Co Shaft positioning clutch device
US2985271A (en) * 1957-12-27 1961-05-23 Ibm Clutch
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US8688036B2 (en) 2006-08-31 2014-04-01 Red Tail Hawk Corporation Wireless communications headset system employing a loop transmitter that fits around the pinna
US8693720B2 (en) 2006-08-31 2014-04-08 Red Tail Hawk Corporation Wireless earplug with improved sensitivity and form factor
US9525930B2 (en) 2006-08-31 2016-12-20 Red Tail Hawk Corporation Magnetic field antenna
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2620394A (en) * 1943-06-11 1952-12-02 Georges Valensi High-speed telegraphic system
US2512889A (en) * 1943-12-17 1950-06-27 Dreyfus Jean Albert Electroacoustic apparatus
US3084213A (en) * 1958-02-28 1963-04-02 Jerome H Lemelson Facsimile apparatus
US3609248A (en) * 1969-03-12 1971-09-28 Electrospace Corp Print out control circuit for telephone transaction system

Also Published As

Publication number Publication date
US2089846A (en) 1937-08-10
US2098802A (en) 1937-11-09
US2048604A (en) 1936-07-21
US2071227A (en) 1937-02-16
US2069061A (en) 1937-01-26
US2145717A (en) 1939-01-31

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