US2420029A - Printing telegraph transmission and reception system - Google Patents

Description

y 6, 1947- N J. B. BRADY 2,420,029

PRINTING TELEGRAPH TRANSMISSION AND RECEPTION SYSTEM Filed June 7, 1945 8 Sheets-Sheet l y 6, 1947. J. B. BRADY 2,420,029

PRINTING TELEGRAPH TRANSMISSION AND RECEPTION SYSTEM Filed June 7, 1945 8 Sheets-Sheet 2 THE TELFVISHJN GYSTEM THAT PROJECTS THE News or me WORL May 6, 1% J. B. BRADY PRINTING TELEGRAPH TRANSMISSION AND RECEPTION SYSTEM Filed June '7, 1945 8 Sheets-$heet 5 May 6," 1947.

J. B. BRADY PRINTING TELEGRAPH TRANSMISSION AND RECEPTION SYSTEM Filed June '7 1945 8 Sheets-Sheet 4 y 6, 7. x J. B. BRADY 2,420,029

PRINTING TELEGRAPH TRANSMISSION AND RECEPTION SYSTEM Filed June '7, 1945 8 Sheets-Sheet 5 J. B. BRADY May 5, 1947.-

PRINTING TELEGRAPH TRANSMISSION AND RECEPTION SYSTEM 8 Sheets-Sheet 6 Filed June 7, 1945 4 A m w m o m N QQQQWQ Fry 93% N05: -85 MN? m .5. B. BRADY May 6, 1947.

PRINTING TELEGRAPH TRANSMISSION AND RECEPTION SYSTEM Filed June '7, 1945 8 Sheets-Sheet 7 Quihwbzx May 6, 1947, J. B. BRADY 2,420,029

PRINTING TELEGRAPH TRANSMISSION AND RECEPTION SYSTEM Filed June 7', 1945 8 Sheets-Sheet 8 nm xw QWW)M II I J \W W T mwizmtw .Pl LI Ni Patented May 6, 1947 PRINTING TELEGRAPH TRANSMISSION AND RECEPTION SYSTEM John B. Brady, Somerset, Md.

Application June 7, 1945, Serial No. 598,135

21 Claims. 1

My invention relates broadly to printing telegraph systems and more particularly to an electronic system of printing telegraph transmission and reception.

One of the objects of my invention is to provide an improved method of transmission and reception of printing telegraph messages involving the electrical scanning of typed messages and the visual reproduction thereof.

Another object of my invention is to provide an improved method of visual transmission and reception of printing telegraph messages by which the transmission copy reproduced on printing telegraph apparatus may be electrically scanned in the course of the printing thereof and the image thereof utilized to electronically control the modulation of the transmission circuit for remotely controlling the electronic reproduction of the messages as initially typed.

Still another object of my invention is to provide a system for the direct electronic reproduction of printing telegraph messages independently of the accompanying vibrations incidental to the operation of printing telegraph mechanism for the remote visual reproduction of the printing telegraph messages.

A further object of my invention is to provide an assembly of electronic scanning means in association with printing telegraph apparatus for eliecting the direct optical transmission of printing telegraph messages.

Still another object of my invention is to provide an arrangement of signalling circuit which is periodically controlled according to the line feed operation of a printing telegraph apparatus for remotely controlling a circuit at the receiving station.

Still another object of my invention is to provide a system of optical transmission and reproduction of printing telegraph messages in combination with means controlled by the progressive transmission of the printing telegraph messages for effecting a permanent record of the printing telegraph messages at a remote receiving station.

Still another object of my invention is to provide a synchronized control system associated with a television transmission system for controlling at remote stations the operation of photographic recording apparatus for permanently recording television reproductions at the remote station.

Other and further objects of my invention reside in an arrangement of control circuits associated with a television transmission and reception system as set forth more clearly in the specification hereinafter following by reference to the accompanying drawings in which:

Figure l is a schematic view illustrating the arrangement of the printing telegraph equipment at the transmission station and the association of the visual transmission equipment therewith for transmitting through a line wire network to the multiplicity of remote receiving stations each of which is provided with electronic visual reproducing systems for projecting the printing telegraph messages on large size viewing screens; Fig. 2 schematically illustrates the system of my invention as applied to a space radio broadcast or point to point transmission and reception system; Fig. 3 is a diagrammatic view illustrating in perspective the manner of forming the printed telegraph messages character by character on the transparent web movable line by line through the projected light path which is directed upon the mosaic of an iconoscope which is electronicallyscanned for operating a transmitter which in turn controls remote receivers for electronically reproducing the printed telegraph messages as they are formed character by character and line by line on the transparent web; Fig. 4 is an elevational view of an automatic printer and an associated iconoscope compactly arranged within a cabinet structure and operating as a converter for translating the permutation and combination signal code of the printing telegraph system into signal impulses controlled by the image of the printing telegraph messages on the mosaic of the iconoscope; Fig. '5 is an elevational View showing a modified arrangement for associating an iconoscope with the printing telegraph apparatus for effecting conversion of the character by character image of the printing telegraph signals into optical signal impulses; Fig. 6 is a fragmentary view showing one form of mounting means for the iconoscope in association. with the optical system depicted in Fig. 4; Fig. 7 is a fragmentary longitudinal sectional view of the mounting means for the iconoscope immediately above the telegraphic printer in the arrangement of Fig. 5 and illustrating the shock-proof means employed for preventing interference from the high speed mechanical operation of the printing telegraph apparatus with respect to the iconoscope; Fig. 8 is a transverse sectional view taken substantial- 1y on line 8-8 of Fig. '7 and illustrating the several points of shock-proof suspension for the iconoscope in a position over the telegraphic printer in the converter cabinet; Fig. 9 is a theoretical view showing the shock-proof suspension of the iconoscope in the optical path of the projected telegraphic messages by which the mosaic of the iconoscope has the image of the telegraphic messages reproduced without interierence from the repeated mechanical vibration inherent in the printing telegraph apparatus optically associated with the iconoscope; Fig. is a diagrammatic view of a transmission control circuit signalling impulse as transmitted upon each line feed operation of the automatic telegraphic printer for controlling the recording apparatus at the monitoring receiving stations of Figs. 10 and 11; Fig. 11 shows the manner of associating the line feed control mechanism of the automatic printing telegraph apparatus and the circuit control device at the transmitter for eiiecting the transmission of the signal impulses as the transparent web is advanced line by line through the printing telegraph apparatus at the transmission station for correspondingly controlling the recording apparatus at the monitoring stations; Fig. 12 is a view showing one arrangement of monitoring receiving apparatus which may be used in the system of my invention in certain localities in which numbers of optical reprcducers are employed in order to determine the condition of the signal in a predetermined area with respect to the transmission station and to provide a permanent photographic record of the optical transmission, the view showing the recording mechanism just prior to the transmission of a line feed signal; Fig. 13 is a fragmentary view showing the recording mechanism under condition of transmission of a line feed signal; and Fig. 1 1 shows a modified form of circuit arrangement for a monitoring station embodying the system of invention in which a permanent motion picture film record is made of the optical transmission.

My invention is directed to an electronic system for scanning typed message in a printing telegraph transmission system simultaneously with the operation of a telegraphic printer for the direct control of a transmission system. The transmission system thus directly controlled by the electronic means operates into the line wire system or into a radio transmitter with which one or more signaling receivers coact for the di rect visual reproduction of the printing telegraph messages. I associate an iconoscope with a telegraphic printer receiver and optically focus upon the mosaic of the iconoscope the typed printing telegraph messages as they are initially printed by the telegraphic printer. The mosaic is electronically scanned and the resulting signalling current impressed upon the modulation circuit of a signal transmitter. The signal transmitter may have the output thereof connected directly to a coaxial cable or wide frequency band distribution circuit or antenna ground system of the radio transmitter. The signal receivers for visually reproducing the televised printed messages m y be connected to the coaxial cable or signal distribution circuit or may be individually connected to space radio pick-up circuits for the visual reproduction of the typed messages. In each instance, I provide optical modification and projection arrangements at the signal reoeivers for reproducing the typed messages on a screen which is visible to groups of observers from substantial distances. Recognizing that the visual reproduction of typed messages directly reproduced from a telegraphic printer is of a passive characteristic, I may provide means at certain signal receivers for monitoring the received televised messages by permanently recording such messages on a photographic film. To accomplish this I provide special means associated with an automatic printer in the transmitting station to transmit signal impulses as the platen of the transmitting telegraphic printer where the control tapes are initially prepared; or as the paper feed roll of the receiving printer, Which is operated under control of the transmitter printer, or tape mechanism operated by the tape prepared on a suitable tape perforator, is successively shifted under control of line feed signals. This impulse or signal that is transmitted to the monitoring station has the eiiect of synchronizing the operation of the remote receiver with the transmitting station and controlling the operation of photographic recording apparatus at the monitoring station. The photographic recording apparatus, in one form, comprises a motion picture camera, general y of the 8 m. In. Size which is focused on the projection screen of the monitoring receiver. The driving motor of the motion picture camera is maintained in operation so long, as a picture current is instant upon the visual receiver. The shutter of the motion picture camera is controlled through a delayed action circuit by the signal impulse controlled by the line feed operation of the printer at the transmitting station. That is to say, the shutter of the motion picture camera is maintained open so long as periodic impulses are received pursuant to line feed signals controlled from the transmitter. The driving motor of the motion picture camera continues to operate so long as a picture current is instant upon the receiver. Thus a continuous film record is maintained of the reproduced televised printed message. In the event that the printer at the transmitting station discontinues feeding the web on which the printed messages are reproduced, the camera at the monitoring station has the shutter thereof closed and the driving motor simultaneously shut down. As a further protection against the wastage of film the drivin motor is cut oil should there be discontinuity of the picture current. It is understood that for any projected transmitter system in a given area it is only necessary to monitor the printer signals at one locality to determine the signal reproduction characteristics in any group of signal receivers.

The signal receivers and the associated visual reproduction means per se are relatively simple and inexpensive in construction and are capable of visually reproducing printed telegraph messages on a screen visible to large groups without the accompanying and incidental expense of maintenance normally encountered in telegraphic printer receivers. Moreover, the operation of the electronic receiving and projection system is substantially silent and is not accompanied by the noise and vibrations incident to automatic telegraphic printer operation.

My invention also contemplates the control of the shutter of a still camera at the monitoring station whereby a photograph is made of each transverse strip of the screen of the monitoring receiver as a line is completed on the printer located at the transmitting station. That is to say, as each line feed signal is transmitted the shutter of the still camera is electromagnetically operated to record a transverse strip of the screen displaying a completely printed line. The camera thus uses a minimum amount of film and integrates line by line the message displayed on the screen.

Referring to the drawings in detail, Figure 1 schematically shows the system of my invention applied to a line wire distribution circuit in which telegraphic transmissions originated at a transmitting station are transmitted to Visual signal receivers and enlarged images visually reproduced. The transmitter involves a source for originating l'laudot code signals which may be sending-receiving page printer set designated by reference character 2 in which the operator manipulates a key-board designated generally at 2 for formulating start stop telegraphic printer signals which reproduce a home record on the receiving portion of the telegraphic printer and transmits over a line circuit 3 telegraphic messages which control the receiving only page printer designated at 4 in the transmitting sta tion and also operates the monitoring tape printer 5 associated with the receiving only page printer l.

I arranged a selector switch i; in the circuit between the line circuit 3 and the circuit to the sending-receiving page printer set l2. The selector switch ll has a movable element l which may be manipulated to establish a circuit through contacts 5, 9 or ill leading to the desired source of Baudot code signals. For example, a transmitter distributor ii controlled by perforated tape i2 may be connected to contact s so that when movable element 'l establishes connection with contact printer signals are transmitted over the line circuit 3 to control the receiving only page printer i and the monitoring tape printer 5. Similarly, signals from a reperforato-r transmitter designated at M may be transmitted over the circuit connection to contact is and when movable element l is moved to a position establishing connection therewith, printer signals are sent from line 3 for operating the receiving only page printer 5 and monitoring tape printer 5. Similarly, a signalling line may be connected from a line wire network directly into line circuit 3 for transmitting the printer signals to the receiving only page printer l. Whatever the source of Baudot code signals the result is the operation of the receiving only page printer i which through the permutation and combination selector mechanism operated at E5 operates the type bar mechanism schematically represented at for directly printing upon the transparent web designated at ll. The transparent web IT is fed from a supply roll. represented at is over a slack bar It and around a lower web guide 26 between the pressure roll El and feed roll 22 to the intermediate guide rollers which I have illustrated distributed at 23, 12 i and 25 for guiding the web ll in a vertically upward path through the optical path from light source 28 and between the platen 21 and the type bar arrangement Id. The optical system includes the condenser lenses 28 which direct the light rays in a concentrated field through the web I! which carries the typed message from the light source and t0 the plane mirror 23 from which the light rays are directed upwardly through the objective lens system 30. The transparent web containing the printing thereon which results from the type bars striking the transparent web ll through the interposition of the ink-bearing ribbon indicated at 3| is directed around the front upper guide roller 32 and around the rear upper guide roller 33 to the re-wind spindle represented at 3 5. The threading of the transparent web H and the arrangement of the type bars for applying the printed message to the transparent web El within the intense light optical path emanating from light source 26 is conventional and is referred to herein merely for the purpose of explaining the association of the transparent web with the electronic system of my invention.

The objective lens 39 is arranged to optically direct the light rays constituting the image of the printed message carried by the transparent web IT upon the mirror 35 from which the rays are directed to the mosaic 36 of the iconoscope 3i. The iconoscope 37 includes the extended section 38 containing the electron gun system for electrically scanning the mosaic 36 upon which the image of the printed message in its virgin or initial state is superimposed.

The electronic gun 38 is conventional in form and provides for the vertical and transverse electronic scanning of the mosaic 35 which receives the image of the printed message. The electronic scanning is effected at a rate which insures the release of electric charges from the mosaic 35 which are contacted through the connection 39 for control of the transmitter ill. The transmitter ts connects through a line wire network represented at ll--d2 to the various receiving stations on the network. Each of the receiving stations which I have schematically shown at 43 and M includes an electronically controlled receiver schematically indicated at 45 and it connected with a kinescope arranged for image reproduction and the optical projection thereof through an optical enlarging system to a relatively large screen represented at El and 48.

The large screen optical reproduction of the image transmitted from the mosaic 36 of the iconoscope is an exact reproduction of the messages typed on the transparent web I! by the type bar mechanism of the receiving only page printer l. The large screen reproduction provides for the optical reproduction of the printing telegraph messages as they are composed character by character and line by line. The type bar page printer l shown herein has an operating characteristic of 45 printed characters per line reproduced on the transparent web ll within the optical field of the condenser lens system 28. The speed of operation of the selector mechanism l5 and the type bar receiving only page printer mechanism 4 is normally 368 operations per minute although the mechanism may readily be modified for operations at higher speeds all of which are within the transverse and vertical scanning speeds of the iconoscope and within the speed of operation of the transmission and the optical receiving and eproducing means. The speed of the vertical and transverse electronic scannin of the mosaic 36 by the electronic gun 33 is such that the image of the printing telegraph messages produced on the mosaic as may be efficiently transmitted into the line wire network 3 l l2 for operation of the several optically reproducing systems at the receiving stations 43 and M.

Fig. 2 of the drawings shows the application of the iconoscope and printer projection system of my invention to transmission by space radio. In this arrangement the radio transmitter is represented at 49 connected to antenna ground system 5il5i arranged to operate under control of mosaic 36 of the iconoscope 3'! through the connection 39. The electrical charges transmitted from iconoscope 31 under control of electronic gun 33 in accordance with the image of the progressively forming and moving telegraphic message on transparent web I! control the operation of transmitter 49 for radiating to any number of outlying radio receiving stations represented at 52 and 53 the high frequency impulses. The radio receiving stations 52 and 53 each include the high frequency radio receivers 54 and 55 each of which is connected with optical reproducing systems for reproducing on large size screens represented at 56 and the scanned image of the progressively forming telegraphic message as initially prepared on the transparent web I! by the receiving only page printing mechanism 4.

The source of originating Baudot code printer signals may be either the usual line wire network such as a news distribution network or the Civil Aeronautics Adminstration printer network interconnecting airports over the country or a Weather Bureau network or other bulletining distributing administrative agency network; or the Baudot code signals may be originated and transmitted directly by key board by operation of the sending-receiving page printer represented at l; or by a prepared perforated tape for operating transmitter distributor H or through the transmitter reperiorator represented at M as heretofore explained.

Fig. 3 illustrates the principles involved in the system of my invention where the light source 26 is passed to the condenser lens systems 28 defining the light beam 58 which is passed through the light transparent web l! of the receiving only telegraph printer mechanism. The light transparent web l l is shown guided between guide rollers 25 and 32 between which rollers the printing telegraph message is applied to the transparent web ll character by character and moved line by line by line feed mechanism applied to feed roll 22. I have shown the platen 27 in the very lowest portion of the light beam 58 forming a bearing surface for the light transparent web I1 when the type pallet of type bar i5 is selectively moved against inked ribbon 3! fOr making a character by character impression upon the light transparent web 1. The threading of the transparent web ii is shown more particularly in Figs, 1, 2, 4, 5 and 8. The re-wind spindle represented at 34 for taking up the transparent web is spring tensioned so that the web with the printing telegraph message thereon winds up on the roll 34 as the transparent web is fed line by line through the printing telegraph receiver. The light rays 58 after passing through the light transparent web it with the printing telegraph message superimposed thereon strikes the plane mirror 29 from which the light is reflected upwardly to the plane mirror 3'5 and reflected therefrom to the mosaic 38 of the inconoscope 3?. The electron gun or" the iconoscope for efiecting vertical and horizontal electronic scanning of the mosaic 36 is represented at 33. The mosaic 36 is connected through line connection 39 to the transmitter 40 which connects line system a! to the remote signal reproducing receiving station 43. The receiving station 43 is shown as including the 'receiver connected with a, kinescope arranged for i-na reproduction and optical projection through an optical enlarging system to the relatively large screen represented at 41.

In order to conveniently arrange the converter which translates the printing telegraph messages into light impulses I arrange the iconoscope within the cabinet which houses the receiving only page printer as represented in Figs. 4-8. In the arrangement shown in Fig. i the cabinet structure is represented at having means for shockproof mounting the cabinet as represented at 50-41. The cabinet is provided with a frame represented generally at 54 which is supported on rollers represented at 65 to enable the entire frame carrying the receiving only page printer 4 and the optical system which is housed within cabinet 66 to be readily rolled out of the cabinet for Iepairs and adjustments from time to time. The roller frame 64 has the mechanism thereon connected through flexible cables to the tenninal board represented generally at 67 to which electrical connections may be made to the external circuits. Immediately above the page printer mechanism 4 and optical system I provide a transverse support 12 which is suitably oilset along the length thereof as represented at 12a and 12b to provide ample clearance for the mounting of the iconoscope within the cabinet structure and to efiect shock-proof mounting at opposite ends thereof as represented at 73 and 14 on the rails 75 and 16 carried by the frame of the cabinet 59. The transverse support 72 provides a shockproof mounting means for the angularly disposed plate member 11 which is shock-proof mounted on the transverse support 12 through suitable shock-proof support indicated at 1B. The plate 11 serves as a mounting means for socket 19 through shock-proof mount lSa which receives the terminal end of the electron gun 38 of the iconoscope 31. The iconoscope 3'! has the mosaic 36 thereof suspended in the projection path of the light beam reflected from mirror 29 through objective lens system 39 as represented generally at 8i. Thus the mosaic 36 receives the image of the telegraphic message imposed upon the transparent web I"! instantaneously with the printing thereof character by character and line by line. The circuits to the iconcsoope have been represented schematically as extending to the terminal board 82 mounted immediately adjacent terminal board ll' containing the circuits to the automatic printer and optical system. The vertical scanning means associated with the electron gun 38 has been schematically illustrated by windings 83 connected through suitable leads 84 with the terminal board 82 while the horizontal scanning means have been represented by windings 85 connected through leads 86 with terminal board 82. The leads to the cathode of the electron gun 38 have been represented at 8'! extending to terminal board 82 and the other leads connecting with other electrodes of the electron gun 38 are represented at 88 extending to the terminal board 82. The iconoscope 31 is suspended in a shock-proof manner with respect to cabinet 59 by the arrangement illustrated in Fig. 6 wherein resilient pads 89 and 90 constitute seats for the iconoscope 37, the pads 89 and 90 being mounted in suitable supports indicated at 91 and 92 which are connected through shockproof mounts 93 and 94 with the brackets 95 and 96. Brackets 95 and 96 in turn connect through shock-proof mounts 9i and 98 with brackets 99 and 100 secured to the cabinet structure 59. Thus shock vibrations imparted from the operation of the automatic printer mechanism 4 or shock vibrations external to the cabinet structure 59 has minimum effect upon the iconoscope.

The cabinet structure 59 also provides ahousing means for a monitor tape printer 5 which is supported upon the hinged bracket it! connected to the cabinet structure 59. The monitor printer 5 is electrically connected in circuit with receiv ing only page printer 4 and serves to make a permanent record of the signals that are transmitted to the page printer 4 as the telegraphic messages that are printed on the transparent web I! are not readily accessible to the electronic transmission thereof inasmuch as the messages are contained on the light transparent web I! which is rolled upon the spring tensioned windup roller 34. The cabinet is provided with a suitable hinged door represented at I82 for entirely closing the converter thereby providing a readily installable unit for a transmission station.

It will be understood that the printing telegraph mechanism and associated light transparent web upon which the telegraphic messages are printed is the invention and development of Teletype Corporation, Chicago, Illinois. The application thereof, however, and combination with electronic systems as set forth herein is my invention and no restrictions thereon are intended other than those set forth in the appended claims.

In Fig. I have illustrated a modified arrangement of the iconoscope 3'! within the cabinet structure 59 wherein the iconoscope BI is mounted in a position which may in some installations be more readily accessible for replacement. In this modified arrangement a transverse member I2 suitably offset along the length thereof is shock-proof mounted at opposite ends with respect to the cabinet structure 59 and carries an intermediate shock-proof mount 18 which in turn supports the bracket I03 which differs in detailed structure from the acutely angled bracket 11 of Fig. 4 in that bracket I83 is obtusely angled. The obtusely angled bracket Iii; provides a support for the shock-proof mount I sa which car ries the socket I9 into which the terminal end 88 of the electron gun 38 of the iconoscope 31 extends. The vertical and horizontal means and elements of the electron gun have again been schematically illustrated. It will be understood that all of these elements are contained within the electron gun and the circuit connection there of extended from the terminal end of the electron gun through the terminal board 82. In this modified arrangement the mosaic 35 of the iconoscope 3'! is suspended in an approximately vertical plane for receiving the reflected image of the telegraphic messages as they are printed character by character on light transparent web II from mirror 35 as illustrated more clearly in Figs. 7 and 8. v

In the shock-proof mounting of the iconoscope as represented in Figs. 7 and 8 bracket members 554 and I65 depend downwardly from the frame '59 of the cabinet structure and provide supports thereon for the shock-proof mounts I06 and I01. The shock-proof mounts I06 and I8! support the upper ends of depending brackets I08 and I09, the lower ends of which are directed inwardly and provide a supporting means for shock-proof mounts ill! and III. The shock-proof mounts lit] and III connect to the members 9| and 92 which are the same members as this circuit in connection with Fig. 6 and which serve as supports for the resilient pads 89 and 9!] which grip opposite walls of the iconoscope 31 and provide a resilient suspension therefor. The iconoscope 3? is thus suspended in a manner in which shock vibrations produce minimum effect thereon even under conditions where the source of such shock vibrations, that is, the automatic printer mechanism 4, is closely adjacent to the iconoscope.

In Fig. 9 I have shown in theoretical View the manner in which the iconoscope 31 is resiliently suspended immediately printer mechanism 4 adjacent automatic in such manner that the mosaic 38' receives the reflected image Q the telegraph message from mirror 35 as it is printed character by character on light transparent web IT while minimizing interference due to shock vibrations by the resilient suspension thereof. The resilient suspension means has been represented theoretically at H2, H4 and M5 for resiliently suspending iconoscope til at separated positions from the electron gun end thereof to the mosaic end thereof. The cabinet structure 59 has also been represented as being shock-proof mounted by the means III; and Ill, each corresponding to the shock-proof mounting means 60 and BI of the cabinet structure illustrated in Figs. 4 and 5.

In Fig. 10 I have shown a transmission control system embodying my invention and in which a signal impulse distinguishable in characteristic from. the picture transmission impulses is emitted each time that a line feed operation of feed roll '22 is effected. I have shown the light transparent web IT receiving the printing telegraph messages produced by the striking of the type pallets carried by type bar I6 against inked ribbon 3i for printing character by character on the light transparent web IT against platen 21 all arranged in the light beam 58. The feed roll 22 is advanced step by step for feeding the light transparent web IT line by line from supply roll is to rewind roll 34 as heretofore explained for projecting through condenser lens system 28 an image of the telegraphic message on mosaic 33 of iconoscope 31. The mosaic 36 of the iconoscope connects through lead 39 to the input of amplifier I I8 suitably biased through resistor H9 and potential source I20 to the electron gun electronic emitter I2 I. The signal input to the amplifier H8 connects across input terminals I22 and I23 as shown. The amplifier II8 connects to the radio transmitter 49 provided with connection to the antenna shown at 50 and connection to ground shown at 5!. The scanning operation by the electron gun is effected in a vertical plane by suitable deflecting electrodes schematically represented at 83 while horizontal scanning is suitably effected by electrodes represented at 85. The vertical scanning means 83 are activated from the vertical deflector amplifier system represented at I24 while the horizontal scanning means are activated from horizontal deflector amplifier system I25. The circuits are synchronized in their operation by synchronizing amplifier I26 associated in circuit with electron gun and the amplifier circuit H8 as represented.

Referring to Fig. 11 I have shown the feed roll for the light transparent web IT at 22 carried on shaft I2! journaled in suitable bearings 62%. Shaft iZl' has an extension on one end thereof to which a sleeve-like coupling I29 is secured for establishing a connection to stub shaft Itii of bevel gear IBI. Bevel gear I3I is meshed with bevel gear I32 carried by shaft I33 which is suitably journaled at I34 on the frame of the receiving only printer a for transmitting line feed movements on feed roll 22 to a position adjacent the base of the printer at which position the contact actuator shaft I35 is journaled. The contact actuator shaft I35 is journaled at I35 and carries the contact actuator I31. The shaft I35 has a bevel gear I33 thereon which meshes with bevel gear I39 on shaft I33. Feed roll 22 is driven step by step through suitable line feed mechanism schematically represented by ratchet Hit and actuating pawl MI. With each line feed p r ion the contact actuator I31 which carries tact I45 due to the biased condition of the leaf spring I43 under control of spring member I41. However, the momentary closing is suihcient to energize relay winding I48 from battery I49. Activation of relay winding I48 serves to attract armature member I59 closing switch II against the action of biasing means I52 which normally urges switch I5! to open position. Switch I5I is connected in the circuit of an oscillator represented by electron tube I53. Tube I53 may be of a variety of forms, but for simplification is shown here as including cathode I53a, control grid I531: and anode I530. The cathode is energized from battery system I54 and the plate circuit is energized from battery system I55. The control grid and the plate circuit are coupled through suitable Coupling elements represented by inductance I56 and resistor I51 in the grid circuit and inductance I58 and resistor I59 in the plate circuit with associated shunting condensers I60 and ISII. The circuits may be adjusted to resonate at a predetermined audio frequency for the production of oscillations which are interrupted by the opening of switch I5I but started with the closing of switch I5I. Thus a line feed operation by movement of line feed roll 22 serves to produce the momentary closing of the oscillator circuit and impress from the output circuit of the oscillator through coupling coil I62 a signal current of a distinguishable frequency characteristic from any of the frequencies impressed upon amplifier circuit II8 from the mosaic of the iconoscope 31 upon the input circuit amplifier II8 through leads I63. The distinguishing frequency may be an audio frequency or a high frequency outside the range of frequency impressed upon amplifier I I8 from mosafe 36. The signal energy output from radio transmitter 49 is therefore composite in character, that is, the signaling energy constituted by the transmission of the image of the printing telegraph message reproduced on mosaic 36 and the periodic line feed signal impulses transmitted under control of the oscillator constituted by electron tube I53.

At the receiving station I provide a television receiver represented at 54 connected to receiving antenna 52 and ground 52a. The output of the television receiver connects through leads I6-l to the kinescope I65 which reproduces the image of the printing telegraph message on the screen I66 thereof. The image is optically magnified through a suitable reflector and mirror system schematically shown at I61 for directing the enlarged image upon mirror I68. Mirror I68 at the receiver reproduces the image of the printing telegraph message as it is produced charac ter by character on the light transparent web I1. This image is focused upon a camera system constituted by light sensitive film I69, a line mask I10 having a transverse slot therein just capable of exposing sufiicient of the running length of the film I69 for receiving an exposure of the last completed printed line reproduced on the mirror I68. The slotted mask I10 is aligned with an objective lens system IN by which the 12 last complete line of printing reproduced on mirror I68 is focused upon a lateral increment of the film strip I69. A shutter mechanism is aligned with the objective lens system [H comprising a plate I12 having a transverse slot I13 therein over which a movable shutter I14, also having a slot I15 therein, is arranged to slide vertically. Shutter I14 moves under control of sets of spring members I16 and I11 pendently from link I16. Link I18 includes an adjustable element I19 therein which connects to armature I of relay 290. The adjustable element I19 may be lengthened 0r shortened to control the effective length of the link I18 to accurately time the registration of transverse slot I13 with slot I ?5 to eifect the exposure of film I69 at the exact instant that a line of printing has been completed at 26I. The winding of relay 200 connects in circuit with suitable source of potential 202 and a contact 203 with which the armature I94 of relay I95 coacts. The circuit from the winding of relay 200 is completed through the relay armature I94 so that contact I94a carried thereby registers with contact 203 at the end of the stroke of movement of armature I94. Thus the film [69 is advanced an increment distance sufficient to move an unexposed portion of film I69 into position for receiving an exposure of the image of the last line of printing 20I when the film has been brought into position of rest. The armature I94 is then returned to the position illustrated in Fig. 12 preparatory to the receipt of the next impulse transmitted from the transmitting station under control of the line feed mechanism at the transmitter. The two alternate conditions of the shutter and the electromagnetic operating mechanism I95 are illustrated in Figs. 12 and 13, Fig. 12 illustrating the unexposed condition of the film record and Fig. 13 illustrating the exposed condition of the film record.

Shaft I8I carries sprocket feed members I82 which engage the perforations I69a and I69b in the film. Shaft I8I also carries sprocket wheel I83 which is driven by sprocket chain I84 from sprocket wheel I85 on shaft I86 spaced from shaft IBI longitudinally of the film I69. Shafts I8I and I86 are approximately equidistantly located on opposite sides of the slotted mask I10 longitudinally of the film. Shaft I86 carries sprocket wheels I 81 and I88 engaging the perforations IBM and I69b in the film for advancing the film step by step a distance equivalent to the image of one line of printing of the printing telegraph message. A ratchet wheel I89 also carried by shaft I86 is engageable by a pawl I90 operated by a bell crank represented at I9I as pivoted at I92. The actuating end of the bell crank I9l is connected through a link I93 to the armature I94 of relay I 95. Relay I95 includes an operating winding I86 connected to the output circuit of amplifier I91. The input circuit of amplifier I91 is sharply tuned by means of a filter circuit represented at I98 to respond to the frequency transmitted from the output of the oscillator at I 92 in the transmitter of Fig. 10. The output of television receiver 54 includes a connection through leads I99 through the filter I98 which is selective to the frequency transmitted under control of the oscillator which operates from the periodic line feed movements of the feed roll 22 at the transmitter. As each line feed operation is complete a signal impulse is emitted and selectively received through circuit I99 from the output of receiver 54 independently of the image signal transmitting the printing telegraph message reproduction. This period signal impulse when selected by the filter I98 and amplified by the amplifier I91 energizes relay winding I96 moving bell crank I9! from the position illustrated in Fig. 12 to the position illustrated in Fig. 13. In the position illustrated in Fig. 13 bell crank I9! moves about pivot I92 shifting pawl I90 to a position in which ratchet I89 is advanced for a distance of one tooth. This movement results from shaft I8 moving sprocket wheels I8! and I88 and also sprocket wheel I85. Sprocket wheels H31 and I83 advance the film I69 a distance of one printing telegraph message line. The instant that the film I69 comes to rest through one increment of line feed length an exposure of the film is effected for recording the image of the last completed line of the printing telegraph message as represented at 2!". The movement of the film I59 occurs before each exposure for supplying a fresh transverse increment of film into position preparatory to the next succeeding exposure.

In lieu of the step by step still picture recording on the film I69, I may provide at the monitoring station a motion picture recording mechanism that I have designated generally at 204 in Fig. 14:. In this arrangement the motion'picture camera is represented as including a supply film roll 225 which is fed over guide roll 206 and drum 201 past the light aperture 208 and around drive drum 209 and guide roll 2! to the film take-up reel 2H. The film is driven under control of motor 2I2 represented as driving belt 2I4 leading to the driving drum 229 and the film take-up reel 2H through belt 2I5. The starting and stopping of driving motor '2I2 is controlled through relay contacts represented at ZIE for controlling a circuit from a power source designated at 2II. The relay 256 includes a relay winding 2I8 which connects to a control circuit designated at 2I9 and including a power source 220. The control circuit 2E9 is constituted by a series path through relay contacts 22I, and 222 both of which must be closed by movement of the armatures 223 and 224 before the circuit to relay winding 2 I8 is complete for starting the driving motor 2 I2 of the motion picture camera. The armature 223 is controlled by relay winding 225 which is connected in series with the picture current circuit 226 leading from the output of the television receiver to the kinescope I65. Relay winding 225 is by-passed by condenser 221. The relay winding 225 is energized only so long as a picture current is supplied to the kinescope I65,

that is, only while the receiver is actually picking up an image transmission. When there is no image transmission on the air or over the line wire net, relay armature 223 is released and contacts 22l are opened as illustrated in Fig. 14. The circuit from the output of the television receiver indicated at its which connects to filter I98 and amplifier i9] is similar to the circuit described in Fig. 12 in that the current impulse from the line feed control mechanism is selectively supplied to the output circuit 228 of amplifier Isl. The succeeding current impulses due to the line feed signals from the transmitter have the effect of electrically charging the capacity device 229 through the relay winding 230. The capacity device 229 is a sensitive gap structure constituted by a pair of capacitatively related electrodes 23I and 232 enclosed in an evacuated envelope. When the sensitive gap is electrically charged the gaseous path between the electrodes in the evacuated envelope breaks down and forms a conductive path thereby energizing relay winding 238. Thus so long as periodic line feed signals are transmitted under control of the web feed mechanism shown in Figs. 10 and 11 the relay winding 2% is maintained energized thus attracting armature 224 and closing contacts 222 and maintaining the control circuit 2I9 closed. However, if the line feed signal impulses should cease, which would correspond to a condition where the light transparent web is no longer advanced at the transmitter, then the charge in the sensitive device 229 leaks off opening the power circuit to relay winding 23!] and releasing armature 224 so that series controlled circuit 2I9 is opened. Under this condition relay winding 2I8 is deenergized and the circuit to the driving motor 229 from power source 2I'I is opened at contacts 2H5 and driving motor 2I2 is brought to rest. As a further condition for the maintenance of operation of driving motor 212, a picture current must be existent and this is determined by the condition of contacts 221 controlled by armature 223 and relay winding 225. Thus as a condition precedent of the movement of the motion picture film 233, there must be simultaneously exist both the picture current in circuit 225 and the periodic line feed signals in the circuit 228. If these conditions do not exist simultaneously, the driving of the motion picture film is shut down automatically. This, however, does not impair the ability of the television receiver to continue to reproduce th image of the printed telegraph message reflected to mirror I 68 which would correspond to a condition where the line by line feed of the light transparent web H at the transmitter is arrested, but where the message already printed is to be permanently displayed over a prolonged time period.

The series control circuit 2I9 also connects to the relay winding 234 which is connected in parallel with relay winding 2H3. Belay wind ing 234 operates armature 235 which connects through. link 2235 with the movable shutter 23?. Movable shutter 23'! contains a transverse slot 238 which is adapted to be registered with light slot 288 when shutter 23'! is drawn downwardly under control of armature 235 against the action of spring 239. Thus while relay winding 234 is energized slots 238 and 238 are maintained in registration and motion picture film 233 is exposed while the film is being driven past the light aperture. The light aperture 2% is focused through an optical lens system designated at 2% upon the image of the printed telegraph message in reflector I58. Thus the character by character and line by line movement of the printed telegraph message is permanently recorded on the motion picture film When, however, either of the picture current fails in circuit 226 or the line feed signals are no longer transmitted to circuit 228; or both; relay winding 234 is deenergized and shutter 23? is shifted by spring 239 closing the light aperture by shifting slot 238 out of registration with slot 228 thereby shutting ofi the exposure of motion picture film to the image of the printed telegraph message.

The transmission reception and reproduction of printing telegraph messages as herein described is not to be confused with the transmission of motion picture films, as in the present problem the printing telegraph message must be synthetically formed character by character within the immediate area of the printing telegraph mechanism which in itself constitutes a source of mechanical vibration in the blow by blow operation of the type pallets in the character by character reproduction of the printing telegraph messages on t ie light transparent web which problem is not involved in previously prepared standard motion picture films supplied for television transmission. Even the image of the last character is scanned as it is produced and a line by line and character by character scannim is continuously effected for continuously transmitting the telegraphic messages as they are formed by the type bars impressing characters upon the transparent web according to the permutation and combinations of the signaling code.

It is understood that the monitoring receivers described in Figs. 12, l3 and 14 may serve a very large number of variously located and geometrically distributed printing telegraph optical reproducing stations and will serve to indicate the receiving conditions existing in the various areas in which such optical receivers are operating.

While I have described my invention in certain preferred embodiments I desire that it be understood that modifications may be made and that no limitations upon my invention are intended other than may be imposed by the following claims.

What I claim and desire to secure by Letters Patent of the United States is as follows:

1. In a communication system embodying a permutation and combination printing telegraph receiver with means for selectively controlling said receiver according to a telegraphic code for printing telegraphic messages on a transparent progressively movable web the method of transinitting and receiving signaling energy which comprises optically projecting image of the typed message progressively a it is formed character by character and line by line on an electronically active surface, scanning said surface, sustaining the image of the previously transmitted characters aid the images of the characters currently transmitted for a multiplicity of lines and electrically transmitting signal impulses according to the optic exposure of the surf cc to aremote electronic optical"reproducing system.

2. In a communication system embodying a permutati and combination printing telegraph h means for selectively controlling said receiver according to a telegraphic code for printing telegraphic messages on a transparent pr gressively movable web the method of transmitting and receiving signaling energy which coinprises suspending a light sensitive surface in the optically projected path of the telegraphic message being typed on the web while substantially preventing the transfer thereto of repeating vie bration from the mechanical operation of the adjacent iinting telegraph receiver, electronically scanning the image of the typed message on the electronically active surface and transmitting signalin impulses from the electronically active surface to a remote electronic optical reproducer for re roducin in similitude the images of the messages 1 ed on the web.

3. In a printing telegraph system employing a start stop permutation and combination printing telegraph transmission mechanism for effectuating the printing of telegraphic messages on a light transparent web, the combination with a line by line progressive light transparent web having means for printing telegraphic messages thereon, a. light ensitive mosaic, means for suspending said light sensitive mosaic in an optical path aligned with the light transparent web, an optical system arranged in said optical path, a light source for directing light rays through said optical system and through light transparent web for focusing and reproducing on said mosaic the line by line progressive image of the printing telegraph message on said light transpar nt web character by character as the printin telegraph D message is printed thereon and means controlled reproducing the by said mosaic for electronically image of the printing telegraph message corr sponding to the image on said in lo.

4. In a printing telegraph system c -ploying a start stop permutation and combinancn printing telegraph tr nsmission mechani n for effectuatthe print of telegraphic messages on a light transparc the combination h a line by i ight tr nsparent web having means for printing telegra no messages thereon, a light source, and an optical system aligned therewith for projecting the image of the printing telegraph message as it is forincd on said light transparent web a light sensitive mosaic for receiving the image of the printing telegraph message, a substantially shock-prooi mounting for said light sensitive mosaic for supporting said mosaic in relatively close association with said means, an electronic scanner for scanning the image of the printing telegraphic message on said mosaic and means controlled from said mosaic for electronically reproducing the image of the printing telegraphic m ssage projected on the mosaic from said web.

5. In a printing telegraph system employing a start stop permutation and combination printing telegraph transmission mechanism for eiTectuating the printing of telegraphic messages on a light transparent web, the combination with a line by line progressive light transparent web having means for printing telegraphic messages thereon character by character, an electronic converter, means for flexibly suspending said electronic converter in an optical path through that portion of the line by line progressive light transparent web which receives the printing telegraphic messages character by character thereon and means connected with said electronic converter for visually reproducing the image of the telegraphic messages as it is formed character by character on said light transparent web While sustaining the image of previous characters and adjacent lines of the printing telegraphic message.

6. I a printing telegraph system employing a start stop permutation and combination printing telegraph transmission mechanism for efiectuating the printing or" telegraphic messages on a light transparent web, the combination with a line by line progressive light transparent web having means for printin telegraphic messages thereon character by character, an electronic converter flexibly suspended in an optical path through that portion of said light transparent web which receives the printed telegraphic messages character by character thereon and means electrically connected with said electronic converter for optically reproducing images of the telegraphic messages recorded character by character on said light transparent web whil sustaining the images of the previously transmitted characters and adjacent lines of the printing telegraphic message.

7. A converter unit for printing telegraph sys- 'tems comprising in combination with a telegraphic transmitter for transmitting a series or" start stop permutation and combination printing telegraph signal impulses, a receiving printer actuated by said impulses for recording character by character and line by line progressive printing telegraph messages on a light transparent web, an iconoscope supported in an optical path through the light transparent web fo receiving the image of the printing telegraph messages as reproduced character by character and line by line on said light transparent web and means connected by said iconoscope for progressively reproducing and optically displaying the image of said printing telegraph messages character by character and line by line.

8. In a printing telegraph system employing a start stop permutation and combination printing telegraph transmission mechanism for effectuating the printing of telegraphic messages on a light transparent web, the combination with a line by line progressive light transparent web having means for printing telegraphic messages thereon character by character, an iconoscope including a light sensitive mosaic and electronic scanning means, a substantially shock-proof mounting for suspending said iconoscope in relatively close association with said mean for printing telegraphic messages on said light transparent web, means electrically connected with said mosaic for optically reproducing and displaying the printed telegraphic messages recorded on said web character by character and means controlled by the line by line progressive movement of said light transparent web for transmitting signal impulses to said last mentioned means.

9. In a printing telegraph system employing a start stop permutation and combination printing telegraph transmission mechanism for effectuating the printing of telegraphic messages on a light transparent web, the combination with a line by line progressive light transparent Web, a printing telegraph receiver for typing telegraphic messages character by character on said light transparent web, means controlled by the line by line progressive movement of said light transparent web for transmitting signal impulses, an iconoscope including a light sensitive mosaic and electronic scanning means associated therewith, means controlled by said light sensitive mosaic for transmitting signalling energy directly in accordance with the image of printin telegraph messages reproduced on said light transparent web, and means for electrically receiving and optically reproducing images of the printing telegraph messages on said light transparent web corresponding to the images on said mosaic, said means being simultaneously responsive to said si nallin energy and said signal impulses.

10. In a printing telegraph system employing a start stop permutation and combination printing telegraph transmission mechanism for effectuating th printing of telegraphic messages on a light transparent web, the combination with a line by line progressive light transparent web, a printing telegraph receiver for printing telegraphic messages character by character on said light transparent web, an electric circuit controller associated with said line by line progressive light transparent web and operative to perform a circuit closing operation with each line by line progressive movement of said light transparent web, an iconoscope including a light sensitive mosaic and electronic scanning means associated therewith, means for supporting said iconoscope adjacent said printing telegraph receiver with a mosaic therein optically aligned with the portion of said light transparent web which receives the printed telegraph messages character by character and line by line, means electrically connected with said mosaic for electrically receiving and optically reproducing the image or the printing telegraph messages impressed upon the progressive light transparent web, a photographic recording apparatus focused upon the optical reproducing means and means controlled by the signal produced by the line by line progressive movement of said light transparent web for successively operating said photographic recording apparatus.

ll. In a printing telegraph system employing a start stop permutation and combination printing telegraph transmission mechanism for eifectuating the printing Of telegraphic messages on a light transparent web, the combination with a line by line progressive light transparent web, a printing telegraph receive for recording printing telegraph messages character by character on said light transparent web, a circuit closing device operated according to the line by line progressive movement f said light transparent web for effecting the transmission of a signal impulse with each line feed operation, an electronic converter interposed in the optical path of that portion of the line by line progressive light transparent web which receives printing telegraph messages character by character thereon, means for controlling the transmission of signalling energy according to the image or" the printing telegraph message on said converter, means connected with said converter for receiving and optically reproducing the printing telegraph messages as such messages are recorded character by character on the light transparent web and photographic means controlled by the signal impulses emitted according to the line by line progr ssive feed of said light transparent Web for successively photographing each printed line as it is optically reproduced.

12. In a printing telegraph system employing a start stop permutation and combination printing telegraph transmission mechanism for effectuating the printing of telegraphic messages on a light transparent web, the combination with a line by line progressive light transparent web, a transmitter including means for transmitting a signal impulse with each line by line progressive movement of the light transparent web a printing telegraph receiver including means for recordin printing telegraph messages character by character on said light transparent web, a converter for receiving an image of the printing telegraph messages as they are formed character by character on said light transparent web, transmission means controlled by said converter, receiving means responsive to said transmission means, an optical reproducer and display device controlled by said receiving means, a photographic recorder aligned with said optical reproducer and display device and means controlled by the signal impulses operative according to the line by line progressive movement of said light transparent web for successively operating said photographic recorder.

13. In a printing telegraph system employing a start stop permutation and combination printing telegraph transmission mechanism for eliectuating the printing of telegraphic messages on a light transparent web, the combination with a line by line progressive light transparent web,

a telegraphic printer having type bar means for ing means for optically reproducing an image of the printing telegraphic messages produced on the lig t transparent web and a photographic recorder including a shutter aligned with said means for optically reproducin the transmitted signals and film moving mechanism, said shutter and film movin mechanism being controlled by the signal impulses controlled by said circuit controller for recording line by line the optical image of the printing telegraph messages.

14. In a television transmission and receiving system, a transmitter including mean for transmitting television signalling energy according to changeable displays and means for separately transmitting control signal impulses concurrently with each completion of display, a television receiver, image reproducing means at said television receiver controlled by said television signalling energy for eiiecting a television reproduction of the transmitted signals upon a screen, a photographic recorder including a shutter, a light sensitive film and a film moving mechanism, and means coordinating the movement of said shutter and said film moving mechanism and operated by the control signal impulses received from said transmitter for efiectin an exposure of said light sensitive film to the image reproducing means.

15. In a printing telegraph system employing a start stop permutation and combination printing telegraph transmission mechanism for effectuating the printing of telegraphic messages on a light transparent web, the combination with light transparent web, an electric circuit controller associated with said line by line progressive light transparent web and operative to perform a circuit closing operation with each line by line progressive movement of said light transparent web, an iconoscope including a light sensitive mosaic and electronic scanning means associated therewith, means for supportin said iconoscope adjacent said printing telegraph receiver with a mosaic therein optically aligned with the portion or" said light transparent Web which receives the printed telegraph messages character by character and line by line, means electrically controlled by said mosaic for electrically receiving and optically reproducing the image of the printing telegraph messages impressed upon the progressive light transparent web, a motion picture camera focused upon the optical reproducing means and means controlled by the signal produced by the line by line progressive movement of said light transparent web for maintaining said motion picture camera in operation for photographically recording the 20 printing telegraph messages electrically received and reproduced.

16. In a printing telegraph system employing a start stop permutation and combination printing telegraph transmission mechanism for effectuating the printing of telegraphic messages on a light transparent web, the combination with -.a line by line progressive light transparent web, a printing telegraph receiver for printing telegraphic messages character by character on said light transparent web, an electric circuit controller associated with said line by line progressive light transparent web and operative to perform a circuit closing operation with each line byline progressive movement of said light transparent Web, an iconoscope including a light sensitive mosaic and electronic scanningmeans associated therewith, means for supporting said iconoscope adjacent said printing telegraph receiver with a mosaic therein optically aligned with the portion of said light transparent web which receives the printed telegraphmessages character by character and line by line, means electrically controlled by said mosaic for electrically receiving and optically reproducing the image of the printing telegraph messages impressed upon the progressive light transparent web, a motion picture camera focused upon the optical reproducing means and means controlled simultaneously by the current incident to the electrical reception of the image of the printing telegraph messages and the signal produced by the line by line progressive movement of said light transparent web for maintaining said motion picture camera in operation for photographically recording the printing telegraphic messages electrically received and reproduced.

17. In a television transmission and receiving system, a transmitter including means for transmitting television signaling energy according to a progressively forming image and means for transmitting control signal mpulses upon completion of .theprogressively formed image, a televisionreceiver, image reproducing means at said television receiver controlled by said television signaling energy for effecting atelevision reproduction of the transmitted signals upon a screen, a motion picture camera focused upon said image reproducing means at said television receiver and means controlled by said control signal impulses for maintaining said motion picture camera inpperation for recordingthe,reproducedimage.

18. In a television transmission and receiving system, a transmitter including means for transmitting television signaling energy according to a progressively forming image ,and means for transmitting control signal impulses upon completion of the, progressively formed image, atelevision receiver, image reproducing means at said television receiver controlled by said television signaling energy for eifecting a television reproduction ,of the transmitted signals upon a screen, a motion picture camera focused upon said image reproducing means at saidtelevision receiver and means simultaneously controlled by the received television signaling energy and the said control signal impulses for maintaining said motion picture camera in operation for recording. the reproduced image.

19. In a television transmission and receiving system, a transmitter including means iortrana mitting television signaling energy according to a. progressively forming image and means for transmitting control signal impulses upon com- 21 pletion of the progressively formed image, a television receiver, image reproducing means at said television receiver controlled by said television signaling energy for effecting a television reproduction of the transmitted signals upon a screen, a, motion picture camera focused upon said image reproducing means at said television receiver including a film driving mechanism and a shutter control mechanism and means controlled by said control signal impulses for actuating said shutter control mechanism and maintaining said film driving mechanism in operation for recording the reproduced image.

20. In a television transmission and receiving system, a transmitter including means for transmitting television signaling energy according to a progressively forming image and means for transmitting control signal impulses upon completion of the progressively formed image, a television receiver, image reproducing means at said television receiver controlled by said television signaling energy for effecting a television reproduction of the transmitted signals upon a screen, a motion picture camera focused upon said image reproducing means at said television receiver including film driving mechanism and a shutter control mechanism and means simultaneously controlled by the received television signaling energy and the control signal impulses for actuating said shutter control mechanism and maintaining said film driving mechanism in operation for recording the reproduced image.

21. In a printing telegraph system embodying a printing telegraph transmitting station and a 22 remotely located printing telegraph receiving station, the method of reproducing images of printed telegraph messages which comprises simultaneously recording at the transmitting and receiving stations a printed telegraph record of the transmitted message where at least one of the records is recorded on a transparent web character by character and line by line, focusing a light source through the web to produce an optical image of the telegraph message, electronically scanning the message on the transparent web at the receiving station character by character and line by line and optically transmitting the image of each character as it is formed while sustaining and continuously transmitting the previous character and contiguous line and previous lines adjacent thereto on the transparent web, and optically reproducing the image of the transmitted message.

JOHN B. BRADY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,110,260 Burgess Mar. 8, 1938 2,046,328 Kleinschmidt July 7, 1936 FOREIGN PATENTS Number Country Date 477,355. British Dec. 28, 1937

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