US2170132A - Message transmitting system - Google Patents

Description

Aug. 22, 1939. A- D. ElTzr-:N

MESSAGE TRANSMITTING SYSTEM Original Filed Sept.

l, 1933 4 Sheets-Sheet l INVENTOR zgwzazztw,

u (Q/Lem ATTORNEY Aug. 22, 1939. A. D. EITZEN 2,170,132

MESSAGE TRANSMITTING SYSTEM original Filed sept. 1, 1933 4 sheets-sheet? Fiyi 1,4 f7

ns i @f *L H Z Jes-T* E ll 3 3 H @15.10 14? 4d? l INVENTOR L EL@ y A www,

BMW

ATTORNEY Aug. 22, 1939. Al D, El-rzEN 2,170,32

MESSAGE TRANSMITTING SYSTEM Original Filed Sept. l, 1933 4 Sheets-Sheet 3 ATTORNEY Aug 22, 1939-' A. D. EITZEN vI?.,`i7(),132

MESSAGE TRANSMITTING SYSTEM Originall Filed Sept. l, 1955 4 Sheets-Sheet 4 as l g nnugjgggggg; muni INVENTOR zgust EL' tze/1,

BY @(90 Uw@ ATTORNEY Patented Aug. 22, 1939 UNITED STATES PATENT oFFlcE MESSAGE 'IRAN SMITTIN G SYSTEM August D. Eitzen, Rockville Centre, N. Y., assignor to News Projection Corporation, New York, N. Y., a corporation of New York Application September 1, 1933, Serial No. 687,811 Renewed October 27, 1937 26 Claims.

electric frequencies to be transmitted to a rel mote station, there to be retranslated into a printed message.

Among the objects of the present invention, it is aimed to provide an improved system for translating a printed message into electric frequencies and transmitting such electric frequencies to a remote station there to be reconverted or retranslated into a printed message.

It is still another object oi' the present invention to provide an improved system for translating a printed message into alternating or pulsating currents and transmitting such currents to a remote station there to be reconverted or retranslated into a printed message.

It is still another object ofthe present invention to provide an improved message transmitting system whereby a printed message can be translated into inaudible frequencies and such frequencies transmitted across a telephone line or the like without interfering with the use of the line for ordinary conversation and the like and retranslating such inaudible frequencies at the receiving station into a printed message o'r a pictorial reproduction of the message.

These and other features, capabilities and advantages of the invention will appear from the subjoined detail description of specific embodiments thereof illustrated in the accompanying drawings in which- Figure 1 is a side elevation more or less diagrammatically showing a sending station made according to the present invention;

Fig. 2 is an enlarged fragmental detail end view of a portion of the sending station illustrated in Fig. 1;

Fig. 3 is an enlarged fragmental plan of the detail illustrated in Fig. 2;

Fig. 4 is a side elevation more or less diagrammatically showing a receiving station made according to the present invention; y

Fig. 5 is an enlarged fragmental side elevation of a portion of the receiving station illustrated in Fig. 4;

Fig. 5a is a detail of a nismgshown in Fig. 5;

Fig. 6 is an enlarged plan more or less diagrammatically showing a portion of the receiving station illustrated in Fig. 4;

Fig. 7 is an enlarged fragmental plan of a portion of the tape in its position relative to the sending station illustrated in Fig. 1;

portion of the mecha- Fig. 8 is an enlarged fragmental end elevation of the tape showing its position relative to the sending station illustrated in Flg. 1;

Fig. 9 is a fragmental detail on the line 9--9 y of Fig. 8; and

Fig. 10 is a i'ragmental plan view of a portion of tape usable with the present invention having a single row of printed matter.

In the embodiment illustrated in Fig. 1, there is illustrated a ticker I of the high speed type extensively used today in which the tape feed rollers 2 and 3 have been anchored against operation so that the tape I -may be continually drawn through the ticker at a uniform rate of speed, as for instance by the tape pulling roller 5. The tape 4 in the present instance is held in frictional engagement with the pulling roller 5 by the spring pressed roller 6. The tape puller, 5 in turn is drivingly connected to the motor 'l and the shaft of the puller 5 is in turn drivingly connected to the rewind reel 8 by the belt 9, the tape passing from the tape puller 5 to the reel 8 after passing under the idler or abutment I0.

Between the ticker I and the tape pulling roller 5, there is disposed the message translating mechanism now to be described.

It consists essentially of a platform II having two rows of openings or orifices I2 and I3. In order to iron out any vibrations transmitted to the tape b y the ticker, there is preferably provided a lever I 4 which presses the tape against a roller I 5 between the ticker I and the platform I I. The openings I2 and I3 are preferably round' and aring outwardly in a downward direction as indicated in Fig. 8.

Preferably the openings I2 are staggered relative to the openings I3 as indicated in Fig. 7. When the tape 4 consists of two rows of printed matter as indicated in Fig. 7, which is illustrative of a piece of ticker tape in actual size about three-quarters of an inch in width, that is one-half the dimensions illustrated in Fig. 7 and in which the width of the characters in the upper row I4 are about three-sixteenths of an inch and the widest characters, to wit the fractions of the second row I5, are about one-quarter of an inch, there will be provided about six openings to each of the rows I2 and I3 in alinement with the upper row of characters il and about eight openings to each of the rows I2 and I3 in alinement with the second row of characters I 5' as illustrated in Fig. l7.

'I'hese rows of openings I2 and I3 are :provided to cooperate with the light rays produced ,by the lamp I6 and directed by the reflector I'I face of the tape 4, thereupon to pass through such tape 4 where the light rays are'not obstructed by characters or portions of characters formed on the tape d. In other Words, the tape 4 is preferably composed of some transparent yor translucent material which will readily permit the light rays to pass therethrough and the ink selected for the ticker l is preferably of a character that will produce a light interrupting impression on the tape d.

Such beams as pass through the tape i as aforesaid will then be received by the objective lens unit mounted in'the casing 2@ and then diverge into independent light rays' corresponding to the uninterrupted openings i2' and i3 to be received by the light sensitive mechanism consisting of the photo-electric cells 2l' and 22, there being a Photo-electric cell 2i for each of the openings i2 and a photo-electric cell 22 for each of the openings i3. f

Consequently the photo-electric cells 2i and 22 will cooperate with the openings l2 and i3 to scan the tape d for light interrupting characters. The photo-electric cells 2i and 22 in the present instance are also arranged in rows which are staggered relative to one another corresponding to the staggered relation of the row of openings l2 to the row of openings i3.

There are preferably provided as many photoelectric cells 2i, 22 as there are openings i2, i3, twenty-eight in the present instance.

For each photo-electric cell, there is provided an audio frequency source adapted to generate a distinct vibration or frequency so that in the present instance, there 'will be provided twentyeight audio frequency devices or generators, each capable of generating its own distinct frequency. These audio frequency devices or generators are preferably as in the present instance, housed in the casing 23. Since the devices housed in the casing 23 are adapted each to generate a frequency different from one another, it is obvious that all twenty-eight frequencies may be electrically/transmitted simultaneously across one and the same electric conductor, as for instance, a telenhone or telegraph wire or by radio broadcas Furthermore, as is a specic object of the present vinstance that the frequencies selected may appear in the so-called inaudible ranges characterized by below sixteen vibrations per second or thirty-two thousand (or more vibra-y of audible or inaudible frequencies selected ac-r cording to the use intended.

sIn the present instance, each photoelectric cell is lconnected to an audio frequency source lo- `cated in the casing 23 by means ofa control tube and a transformer, each cell being connected to an individual control tube 24 by one conductor 25, which tube 24 is in turn connected by a. conductor 2 with the i ansformer 2 and which transformer is directlyconnected to an audio frequency source in the casing 23 by the conductor 28. Each cell 2l is further connected to a. common conductor 29 which in turn is con- 'arcaica nected to the common conductor 30 which is connected to a source of current 3l, which source for instance by the conductor '38 to the tube 39 and by the conductor 4t to the common conductor 29, which latter is in turn' connected to the common conductor 30 as aforesaid, while the tube 39 is connected a transformer di by the conductor 62, which transformer il is connected to its audio frequency generating source in the casing 23 by the conductor 62 and is connected to the telephone line 3l by the conductor 33.

The telephone line 3i is in turn connected to a plurality of receiving units, twenty-eight in number, each resonantly tuned to one of the audio or even inaudible frequencies generated in the casing 23, which receiving units consistV essentially of an audio frequency lt'er and amplier housed in the present instance for convenience in the casing dd. These several receiving units are in turn connected tothe common ground or return wire 45.

Each of the receiving units or channels located in the casing @d is connected to one of the electromagnets illustrated in Fig. 6. As an instance, the magnet 66B of the magnets 4G is connected by the conductor 4l to one of such receiving units and this magnet 468 is in turn connected to a common return lead 48 to all of the receiving units by means of the conductors and .50. I

The adjacent magnet 461 in the present instance is connected to its individual receiving unit by the conductor 5l and also connected to the common return lead 48 by the conductors i9 and SQ. For convenience of description, the

magnets in the right hand row will be designated by the reference character 46 and the magnets in the left hand row by the reference character 52. The only other conductor shown between a magnet and its individual receiving unit is the conductor 53 connected to the magnet 46, although it is of course understood that each .of the magnets d6, will be provided with an individual conductor independently connecting each magnet with its individual receiving unit. The magnet 4611 in the present instance is connected to the common return lead 48 by the conductors. d8a and 48h.

Each of the magnets 46 in the present instance is operatively associated with one of the photoelectric cells 22 and each of the magnets B2 with one of the photo-electric cells 2|. Each of the magnets 46 is in turn operatively associated with an impression pin 55 corresponding in position, see Fig. 7, to a corresponding opening I3 in the platform Il and each magnet 52 is in turn operatively associated with an impression pin 54 corresponding in position to a corresponding opening I2 in the platform Il.

The impression pins 54 and 85 are disposed adjacent to one another to correspond es nearly as possible to the positions of the openings I2 and i3. 'I'he free lower ends of the impression pins 54 and 55 are to be inked as hereinafter 75 to be described to produce impression marks corresponding to the inked impressions on the tape 4, the pins 54 reproducing such impression marks on another tape at the receiving station, to wit on the tape 58 shown in Fig. 6 on a scale. of four to one as compared to full size.

In the present instance, the impression pins 54 and 55 are secured to the lower ends of the shanks 51 and 58 which are slidably mounted in the block 59. To the block 59, there is attached the container constituting a reservoir for the ink 8|, the base of which container is provided with openings to permit the impression pins 54 and 55 to extend therethrough to pass through a pad 82 maintained in position on the lower face of the block by the bracket 83, the pad being supplied with ink by the seepage which passes to it through the openings in the base in which the pins 54 and 55 are slidably mounted.

Beneath the bracket 83, the tape 58 is caused to pass from the supply roll 84 by the tape drawing roller 85.

In the operation of the device, when a character or letter on the tape 4 interrupts the passage of light rays therethrough, this interruption will be transmitted to the receiving units there to actuate those pins 54, 55 which correspond to the openings |2, |3 which have not been obstructed. The tape 58 will be constantly advanced under the bracket 83 to be at all times ready to receive an impression. The pins 54 and 55 which have been actuated will be caused to extend a short distance beyond the lower face of the bracket 8l so that .if the tape as it is intended to do is pressed upwardly against such extending pin 54, 55, an impression of the same will be made. y

It is of course understood that the lends of the pins 54, 55 may be formed to constitute round rectangular or other shaped type markings 4so that the impression on the tape 88 may consist either of a series of dots, dashes or the like delining the areas of the letters, markings or the like to be reproduced.

In the present instance, the hammer action or impression producing action will be eiected by the platen 88 preferably composed of rubber or the like which is mounted on the bracket 81 and has extending from its lower face two journals 88 and 89. The journal 88 is pivotally connected to the link 10 which in turn is connected to the link 1| pivotally connected to a xed abutment 12 at its lower end, while the pivotal connection of the links 10 and 1| with one another is pivotally connected to the link 13 which in turn is pivotally connected to the pivotal connection of the links 14 and 15 with one another.

The upper end of the link 14 is pivotally connected to the journal 89 and the lower end of the link 15 is pivotally connected to the ilxed abutment 18. The pivotal connection of the links 14 and 15 is in turn connected by the link 11 with the counter-weighted c rank 18 and the journal 89 is pivotally connected by the link 19 to the fixed abutment 80.

{I'he crank 18 is preferably mounted on a shaft 8| which is drivingly connected to the shaft 82 which in turn has a bevelled gear 83 on its lower end in mesh with the bevelled gear 84 on the shaft 85. The shaft 85 is provided with a worm 88 in mesh with the worm wheel 81 on the driven shaft 88. The speed impartedby the motor 8| e to the shaft 8| through the driving connection aforesaid to the shaft 88 will be such that the tape 58 will be yadvanced across tne platen 88 at a rate substantially equal .to the rate of movement of the master at the scanning transmitter. Preferably the scanning openings i 2, |3 are about one-sixty-fourth of an inch in diameter and the diameter of the impression pins 54, 55 are similarly about one-sixty-fourth of an inch. Consequently for an inch of tape, it would require at least sixty-four impressions of the pins 54, 55 to fully cover an inch of tape. So that it will not be necessary to synchronize the actuation oi' the platen 88 with the actuations of the pins 54, 55, it is desirable to have the platen reciprocated at a speed exceeding sixty-four impressions during the movement of an inch of tape or exceeding the speed of sixty-four actuations of the impression pins 54, 55 during the passage of an inch of tape. In the present instance, the driving connection from the shaft 8| to the shaft 88 is such that for the passage of an inch of the tape 58, the platen 88 will have been reciprocated into printing position at least one hundred and twenty-eight times.

'Ihis speed of reciprocation is desired in order to insure picking up every message that is transmitted by the actuation of the pins 54 and 55.

In order to facilitate momentary arrest of the tape 58 during the printing action, the pulling roller 85 is resiliently connected to the hub or boss 89 fixed to the shaft 88, the hub 89 having a projection or ear 90 which is connected by the spring 9| with the inner face of the pulling roller 85 to urge the abutment 92 of the pulling roller 85 into engagement with the projection 90. For frictionally maintaining the tape in engagement with the driving roller 85, there is provided the spring pressed idler 93.

In some instances, it may be desirable to project the reproduced impressions on the tape 58, in which case, see Fig. 4, the tape is caused to pass from the pulling roller 85 to and across the light aperture on the top of the extension 94 of the lamp housing 95 from which the tape 58 is drawn onto the rewind reel 98 which is drivingly connected in any suitable manner of slippage compensaton for changing diameter to the motor 91.

Above the light aperture in the .extension 94, there is provided an objective lens unit mounted in the casing 98 to receive the image impressed light rays from the light aperture of the extension 94 and direct them onto a deflector not shown and finally onto the screen 99.

The actuation of the shanks 51 and 58 and thereby the pins 54, 55 by the magnets 52, 48 will now be described.

For convenience of assembly, each of the sets of magnets 48 and 52 will be divided into two rows, an inner row and an outer row. The magnets of the inner row in which the magnets 48a and 48b appear each has, see Fig. 5a, its core disposed in alinement with the armature |00 formed on the arm |0|. The arm |0| associated with the magnet 48a as an instance, is fixed to the rock shaft |02 which in-turn is provided with an arm 03, see 6, the free end of which is disposed to oscllate in a. slot formed in the stop bar |04. Adjacent the stop bar |04, the arm |03 alines with the upper end of the shank 58 in the block 59 corresponding to the photo-electric cell 22 with which the magnet 48a is operatively connected. The Shanks 57 and 58 are in turn provided with the'at springs |05 and |08 respectively for maintaining the pins 54 and 55 in raised position or always in contact with arms |03, In order to predetermine the extent of movement of an arm |03, the stop bars |04 are provided with abutment faces |04a to fix the extent of descent of an arm |03, and thereby the extent of 75 'me arms ma, m in tum are provided with' springs ll for urging the free ends of the arms M33, iii into pin depressing position against the tension of the weaker springs 05, H06. Each Aof the magnets of the outer row, as an instance, see the magnet 46 has its core alined with lthe armature 08 on the free end oi the arm 09 xed to the rock shaft il@ at its lower end, which rock shaft has fixed to it an arm iii, the free end of which is similarly positioned to oscillate in the bar 604.

`Adjacent the bar EN, the arm Hi alines with the upper end of a shank 58, This arm i it is also provided with a spring mi normally to urge it into pin depressing position against the tension of the weaker spring it.

The operative associations of the inner and outer rows of magnets 52 with the pins 5l are sub- I stantially identical with that just described with regard to the inner and outer rows of magnets 66.

From the foregoing, it will thus appear that when a character on the tape interrupts the light, the interruption will be transmitted by the cells 2l, 22 to corresponding magnets t5, 52 and that when so interrupted, the springs itil will be free to depress the arms it, iii into pin extending position and that when so extended, the reciprocating platen Se will immediately reproduce an impression of the extended pins onto the tape 56 thereby to reproduce the markings on the tape I.

From the foregoing, it will of course also appear that markings on the tape 4 need not necessarily be produced by a printer, such as the printer i but can be produced by the human hand and that script when produced on the tape 4 in light interrupting ink will be reproduced on the tape 5t in the same manner.

It will of course also be obvious that instead of` light interrupting markings on the master t, the master t may be composed of light interrupting material and provided with light passable areas, such for instance as perforations or transparency or translucency imparting impressions, in which case a negative instead of a positive picture would result without departing from the general spirit of the invention.v

In Fig. 10, there is illustrated a tape 4 having a single row of printed matter 48. When tape such as the tape 4B is used, it is of course obvious Y that the light openings l2, i3 can be reduced in number .as an instance to consist merely of the upper row of openings i2, i3 shown in Fig. 7. In this case, the audio frequency sources and re lated parts will of course similarly be reduced in number.

It is of course also obvious that the message impressed on'the master may be in code form and that this message in code can in turn` be translated into pulsating currents and such pulsatingcurrents electrically transmitted and translated-to actuate recording devices at the receiving stations to' select characters or portions of characters corresponding to the code initially transmitted.

The springs |01 in the prent instance effect a prompt extension of the pins Il, 55 into imdescent of the pins 54, 55 and the stops EN above pression creating position when the armatures iti, 608 connected thereto are released vby the de-energization of the electromagnets 46, 52'operatively associated therewith.

The objective lens unit retained in the casing 2G cooperates with the location of the openings i2, i3 and of the photo-electric cells 2i, 22 relative to one another to produce enlarged and sharply dened images of selected portions of the master tape ll, thereby to facilitate positioning the respective parts during assembly with less percentage of error and consequently facilitate control of the translation of the markings on the master tape into electrical equivalents during the process of dissecting or scanning.

To prevent smudging of the markings on the tape 56 at the receiving station, the bracket 63 is preferably provided with buttons 63a at the ends thereof and disposed in alinement with those portions of the tape disposed'between and to either sideof the areas of the printed matter.

It is obvious that various changes and modications may be made to the details of construcution without departing from the general spirit of the invention as set forth in the appended claims.

1. The Vsystem of transmitting messages consisting of a transmitting station having a record or master composed of alight transmittable tape having light interrupting characters impressed i thereon, a pulsating current generator for generating a plurality of pulsating currents corresponding to the location of light rays transmitted through said tape, a light sensitive mechanism operatively associated with said pulsating current generator, a source of light for directing the light rays through the unimpressed portion of said record and onto said light sensitive mechanism in turn to select the pulsating currents corresponding to the light rays being transmitted, and a. receiving station having a pulsating current iilter means for lterlng out a plurality of pulsating currents corresponding to the frequencies of said transmitting station, a mechanical recording device, and means operatively associating said mechanical recording device with said pulsating current ilter means electrically to control said mechanical recording device imaccordance with the pulsating currents transmitted to record the msage `transmitted.

2. In a message transmitting system, the combination with a transmitting station having a master and means for impressing a message on the surface of said master, of a receiving station having a tape, a recording device for mechanically recording a message on said tape, a generator for translating the message on said master into pulsating currents, devices for electrically transmitting said pulsating currents to said receiving station, a separator at said receiving station for separating said pulsating currents, and an electrical controller operatively 'associated with said mechanical recording means electrically to control said recording means to record on said tape the message transmitted.

3. In a message transmitting system, the combination with a transmitting station having a master and means for impressingv a message on the surface of said master, of a. receiving station having a tape and means for recording a message on the surface of said tape, means for translating the message on said master into audio frequencies, means for electrically transmitting said audio frequencies to said receiving station, and means including magnets operatively associating said transmitting means with said recording means to record on said tape the message transmitted.

4. In a message transmitting system, the cornbination with a transmitting station having a master and means for impressing,a message on the surface of said master, of a receiving station having a tape and means for recording a message on said tape, means including a light sensitive mechanism for translating the message on said master into audio frequencies, means for electrically transmitting said audio frequencies to said receiving station, and means including magnets operatively associating said transmitting means with said recording means to record on said tape the message transmitted.

5. In a message transmitting system, the combination with a transmitting station having a master and means for impressing a message on the surface of said master, of a receiving station having a tape and means for recording a message on said tape, means including a light sensitive mechanism for translating themessage on said master into audio frequencies, means for electrically transmitting said audio frequencies to said receiving station, and means including an audio frequency filter operatively associating said transmitting means with said recording means to record on said tape the message transmitted.

6. In a message transmitting system, the combination with a transmitting station having a light transmittable master and means for impressing a message on said master in light interrupting characters, of a receiving station having a tape and means for recording a message on said tape, an audio frequency generator, a light sensitive mechanism operatively associated with said audio frequency generator, a source of light operatively associated with said master for directing light rays through the unimpressed portion of said tape onto said light sensitive mechanism in turn to cause they selection of generated audio frequencies corresponding to the message impressed, means including an audio frequency filter for transmitting the audio frequencies selected to said receiving station, and means including magnets operatively associating said audio frequency filter with said recording means to record on said tape the message transmitted.

7. In a message transmitting system, the combination with a transmitting station having a light transmittable master and means for impressing a message on said master in light interrupting characters, of a receiving station having a tape and a device for recording a message on said tape, an audio frequency generator, a light sensitive mechanism operatively associated with said audio frequency generator, a source of light operatively associated with said master for directing light rays through the unimpressed portion of said tape onto said light sensitive mechanism in turn toy cause the selection of generated audio frequencies corresponding to the section of the message impressed, means including an audio frequency filter for transmitting the audio frequencies generated to said receiving station, and means including magnets operatively associating said audio frequency filter with said recording devices to make inoperative those recording devices which correspond to the section of the message transmitted whereby the message will be recorded by the recording devices not so made inoperative. .s

8. In a message transmitting system, the combination with a light transmittable master, of means for impressing light interrupting markings on said master, a stationary platform having a plurality of openings, a light sensitive mechanism having a plurality of devices each corresponding to one of said openings, means for drawing said master across said platform, a source of light for directing light rays through the openings in said platform not obstructed by light interrupting markings onto corresponding devices, and an audio frequency generator having devices for generating a plurality of frequencies corresponding to the number of openings in said platform, each device of said generator being operatively associated with one of the devices of said light sensitive mechanism to select the frequency corresponding to its associated unobstructed opening.

9. In a message transmitting system, the combination with a light transmittable tape, of a printer for impressing a message in light interrupting areas on said tape, a stationary platform having a row of openings, a plurality of light sensitive devices one corresponding to each of such openings, means for drawing said tape across said row of openings, a source of light for directing light rays through the openings in said platform not obstructed by light interrupting areas onto corresponding light sensitive devices, and an audio frequency generator having devices for generating a plurality of different frequenciesl corresponding to the number of openings in said platform, each device of said generator being operatively associated with one of said light sensitive devices to control the frequency corresponding to its associated unobstructed opening.

10. In a message transmitting system, the combination with a light transmittable tape, of a printer for impressing a message in light interrupting markings on said tape, a stationary platform having a plurality of rows of openings, a' plurality of light sensitive devices, one corresponding to each of such openings, means for drawing said tape transversely across said rows of openings, a source of light for directing light rays through the openings in said platform not obstructed by light interrupting markings onto corresponding light sensitive devices, an audio frequency generator having devices for generating a plurality of different frequencies corresponding to the number of openings in said platform, each device of said generator being operatively associated with one of said light sensitive devices to control the frequency corresponding to its associated unobstructed opening, and a receiving station having a recorder operatively associated with said generator to reproduce the message formed on said tape.

11.l In a e transmitting system, the combination with a transmitting station having a generator for generating a plurality of audio frequencies corresponding to the section of markings on a tape, of a receiving station having an audio frequency filter operatively associated with said generator, a plurality of printing bars, means for yieldably maintaining said bars in extended impression ,creating position, means including a,

plurality of magnets, one for each printing bar operatively associated with said audio frequency lter for withdrawing the printing bars corresponding to the audio frequencies selected to leave extended those printing bars corresponding to the markings on the tape at the transmitting station, a platen, means for drawing a second tape across said platen adjacent to said printing bars, and means for reciprocating said platen into impression receiving contact with said printing bars.

12. In a message transmitting system, the combination with a transmitting station having a generator for generating a plurality of audio frequencies corresponding to thesection of markings constituting a message, of a receiving station having an audio frequency lter, said filter having a resonantly tuned device forming a channel corresponding to each of the audio frequencies generated by said generator, a plurality of printing bars, means for yieldably maintaining said bars in vextended printing position, means operatively associating each of said bars with one of said ltering devices for withdrawing the printing bars cor.

responding to the audio frequencies generated and leave extended those printing bars corresponding to the markings constituting the message, a platen, means for drawing the tape across said platen adjacent tosaid printing bars, and means for reciprocating said platen into impression receiving contact With-said printing bars.

13. In a message transmitting system, the combination with a transmitting station 'having a generator for generating a plurality of audio frequencies corresponding to a succession of points constituting the sections of characters, of a receiving station having an audio frequency lter, said filter having a plurality of ltering devices each corresponding to one of the audio frequencies generated, a plurality of point producing printing bars, a block in which said printing bars are vertically slidable, an ink reservoir associated with said block,vmeans for yieldably maintaining said bars in depressed impression creating position, means operatively associated with said filtering devices for withdrawing the printing bars corresponding to the audio frequencies gener ated, a platen, means for drawingv a tape between said platen and said printing bars, and means for reciprocating said platen into impression receiving contact with said printing bars at a rate per unit of time corresponding to a number per unit of time exceeding the number of impression areas required to cover a unit length of tape per unit of time.

14. In a message transmitting system, the combination with a master, of Vmeans for impressing light interrupting markings on said master, a platform having a plurality of openings, a light sensitive mechanism having a plurality of devices each corresponding to one ofald openings, means for drawing said master across said platform, a

source of light for directing light rays through the openings in said platform not obstructed by light interrupting markings onto corresponding devices, an audio frequency generator forgenerating a plurality of frequencies corresponding to the number of openings in said platform, said generator being operativelyrassociated with said light sensitive mechanism to select the frequencies corresponding to unobstructed openings, a receiving station having an audio frequency filter, said filter having a plurality of filtering devices, one corresponding to each frequency generated by said generator, a plurality of printing bars, means for yieldably maintaining said barsv in extended impression creating position, means operatively associated with said filtering devices for withdrawing the printing bars corresponding to the audio frequencies generated, a platen,

anonce means for reciprocating said platen into impression receiving contact with said printing bars.

15. In a message transmitting system, the combination with a transmitting station having a master and means for impressing a message on said master in light interrupting characters, of a receiving station having a tape and a device for recording a message on said tape, a pulsating current generator for generating inaudible frequencies, a light sensitive mechanism operatively associated with said pulsating current generator, a source of light operatively associated with said master for directing light rays through the unimpressed portion of said tape onto said light sensitive mechanism in turn to select and control said generated inaudible frequencies correspending to the message impressed, means including a wire for electrically transmitting said ,inaudible frequencies to said receiving station without interfering with the use of said wire for carrying the normal audible voice currents, and means including an inaudible frequency filter operatively associating said wire 'with said recording device to record on said tape the message transmitted.

16. In a message transmitting system, the combination with a transmitting station having a light transmittablev master and means for im-v pressing a message on said master in light interrupting characters, of a receiving station having a tape and a device for mechanically recording a message on said tape, an audio frequency generator, alight sensitive mechanism at the transmitting station operatively associated with said audiov frequency generator, a source of light optransmitted.

17. In a message transmitting system, the combination with a master, of means for impressing light interruptingRmarkings on said master, a platform having a row of openings, a light sensitive mechanism having a plurality of devices, each corresponding to one of said openings, means for drawing said master longitudinally across said row of openings, a source of light for directing lighj; rays through openings in said platform not obstructed by light interrupting markings onto corresponding devices, an audio frequency generator for generating a plurality of frequencies corresponding to the number of openings in said platform, said generator being operatively associated with said light sensitive mechanism to select and control the frequencies corresponding to unobstructed openings, a receiving station having an audio frequency lter, said lter having a plurality of filtering devices, one corresponding to each frequency generated by said generator, a row of printing bars corresponding in number and position to the openings in said platform, means for yieldably maintaining said bags inl extended impression creating position, means'operatively associated with said nltering devices for withdrawing the printing bars corremeans for drawing a tape across said platen, and' \sponding to. the audio frequencies selected,y a

platen, means for drawing a tape longitudinally across said row of bars in the same direction that the master is drawn across said openings, and means for reciprocating said platen into impression receiving contact with said printing bars.

18. In a message transmitting system, the combination with a transmitting station having a generator for generating a plurality of audio frequencies corresponding to the area of markings on a tape, of a receiving station having an audio frequency filter operatively associated with said generator, a plurality of printing bars, means for yieldably maintaining said bars in extended impression creating position, means including a plurality of magnets, one for each printing bar operatively associated with said audio frequency lter for withdrawing the printing bars corresponding to the audio frequencies selected to leave extended those printing bars corresponding to the markings on the tape at the printing station, a platen, a tape puller for actuating said tape puller continuously to draw a second tape across said printing bars, actuating means for said tape puller, means for yieldably connecting said tape puller to said actuating means in order to compensate for any retarding action imparted to the tape during the printing action, and means for reciprocating said platen into impression receiving contact with said printing bars.

19. In 'a message transmitting system, the combination with a transmitting station having a generator 'for generating a plurality of audio frequencies corresponding to the areas of markings `on a tape. f a receiving station having an audio frequency filter operatively associated with said generator, a plurality of printing bars, means for yieldably maintaining said bars in extended impression creating position, means including a plurality of magnets, one for each printing bar operatively lassociated with said audio frequency filter for withdrawing the printing bars corresponding to the audio frequencies selected to leave extended those printing bars corresponding to the' markings on the tape at the transmitting station, a platen, means for drawing at a uniform rate of speed a second tape across said platen adjacent to said printing bars, means for reciprocating said platen into impression receiving contact with said printing bars, an inspection area and a second tape drawing means for drawing said second tape across said inspection area, said first drawing means being disposed in advance of said inspection area. to cooperate with said second drawing means to maintain the tape smooth while crossing said inspection areawithout any auxiliary control.

20. In a. message transmitting system, the combination with a transmitting system having a master and means for impressing a message on said master in light interrupting characters. a platform having two rows of openings', a plurality of light sensitive devices, one corresponding to each of said openings. means for drawing said tape longitudinally across said rows of openings, a source of light for directing light rays through the openings in said platform not obstructed by light interrupting markings onto corresponding light sensitive devices, an audio frequency generator for generating a plurality of different frequencies corresponding to the number of openings in said platform, said generator being operatively associated with said light sensitive devices to generate the frequencies corresponding to the unobstructed openings, a receiving station having an audio frequency nlter, said filter having a plu- 7 rality of filtering devices, one corresponding to each frequency generated by `said generator, two rows of printing bars each corresponding in position and location to one of for yieldably maintaining said bars in extended impression creating position, means operatively associated with said filtering device for withdrawing the printing bars corresponding to the audio frequencies selected, a platen, means for drawing a tape across said platen, and means for reciprocating said platen into impression receiving contact with said printing bars.

21. A receiving station for a message transmitting system having an audio frequency filter, a plurality of printing bars, means for yieldably maintaining said bars in extended impression creating position|` means including a plurality of magnets, one for each printing bar operatively associated with said audio frequency iilter for withdrawing the printing bars corresponding to the audio frequencies selected to leave extended those printing bars corresponding to the marks to be produced, a platen, means for drawing a tape across said platen adjacent to said printing bars, and means for reciprocating said platen into impression receiving contact with said printing bars.

22. A receiving station for a. message transmitting system having an audio frequency filter, said filter having a resonantly tuned device forming a channel corresponding to each of the audio frequencies generated, a plurality of printing bars. means for yieldably maintaining said bars in extended printing position, means operatively associating each of said bars with one of said filtering devices for withdrawing the printing bars corresponding to the audio frequencies generated and leave extended those printing bars corresponding to the marks to be produced, a platen, means for drawing the tape across said -platen adjacent to said printing bars, and means for reciprocating said platen into impression receiving contact with said printing bars. y

23. A receiving station for a message transmitting system having an audio frequency nlter, said filter having a plurality of filtering devices each corresponding to one of the audio frequencies generated, a plurality of point producing printing bars, a block in which said printing bars are vertlcally slidable, an ink reservoir associated with said block, means for yieldably maintaining said bars in depressed impression creating position, means operatively associated with said filtering devices for withdrawing the printing bars corresponding to the audio frequencies generated, a platen, means for drawing a tape between said platen and said printing bars, and means for reciprocating said platen into impression receiving contact with said printing bars at a rate per unit of time corresponding to a number per unit of time exceeding the number of impression areas required to cover a unit length of tape per unit of time.

24. A receiving station for a message transmitting system having a printer, said printer having a plurality of printing bars, means for yieldably maintaining said bars in extended impression creating position. means including a plurality of magnets for controlling the actuation of said printing bars, a platen, means for continuously drawing a tape across said platen adjacent to said printing bars, means for continuously reciprocating said platen into impression receiving contact 'with said printing bars while said tape is said openings, means Abeing fed by said tape drawing means, actuating u means operatively associated with said reciprogating means, means for yieldably connecting said tape drawing means to said actuating means in order to compensate for any retarding action imparted to the tape during the printing action, an inspection area, a second tape drawing means for drawing said tape across said inspection area, a continuously operating motor; and a slippage device for operatively connecting said second tape drawing means with said motor to compensate for any variation in speed imparted to the tape by said yieldable means.

25. The system of transmitting messages consisting of a transmitting station having a record or master composed of a light transmittable tape having light interrupting characters impressed thereon, a pulsating current generator for generating a. plurality of pulsating currents corresponding to the location of light rays transmitted through said tape, means operatively associating said pulsating current generator and said light transmittable tape to select the pulsating currents required to dene the message to be transmitted, and a receiving station having a pulsating current lter means for iiltering out a plurality of pulsating currents corresponding to the frequencies of said transmitting station, amechanical recording device, and means operatively associating said mechanical recording device with said current filter means electrically to control said mechanical recording device in accordance with the pulsating currents transmitted to record the message transmitted.- y

26. In a message transmitting system, the combination-with a transmitting station having a master and means for impressinga message on the surface of said master, of a receiving station having a tape and means for recording a message on said tape, means including a light sensitive mechanism for translating the message on said. master into audio frequencies, means for electrically transmitting said audio frequencies to said receiving station, and means operatively associating said transmitting means with said recording means to record on said tape the message transmitted.

AUGUST D. EI'IZEN.

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