US2276263A - Telegraphic code transcribing device - Google Patents

Description

March 10, 1942.

Filed April 7, 1959 2 Sheets-Sheet 1 INVENTOR EDWARD N DINGLEY JR. BY

ATTORNEY Patented Mar. 10, 1942 UNITED STATES PATENT OFFICE Edward N. Dingley, Jr., Arlington, Va. Application April 7, 1939, Serial No. 266,517

' 18 Claims. (01. 17826) (Granted under the act of March 3, 1883, as

amended April 30, 1928; 870 0. G. 757) This invention relates in general to devices for transcribing telegraphic code, and in particular to an-improved device for automatically transcribing the equivalents of telegraphic code characters from a tape upon which the telegraphic code characters appear. I

An object of this invention is to provide an improved device that will automatically, accurately, and at a high rate of speed, transcribe the letter, numeral or other equivalents of telegraphic characters appearing on a tape.

Another object of this invention is to provide an improved device that will eliminate the necessity for a trained operator in a common and important method of telegraphic code reception, in which the operator, by visual observation of the code characters appearing on a tape, manually transcribes the equivalents of such code characters by typewriter.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of parts as will be hereinafter more fully described.

Reference is to be had to the accompanying drawingsforming a part of this specification in which like reference characters indicate correspending-parts throughout the several views and in which:

Fig. 1 shows the synchronizing mechanism of my invention and the controlling and actuating mechanism for the code and letter bars;

Fig. 2 is a plan view of the code and letter bars of my invention together with the solenoids used in connection therewith: a

Fig. 3 is a front elevation of the mechanism of Fig. 2;

Fig. 4 is a right side elevation of the mechanism of Fig. 2; and

Fig. 5 is a left side elevation of the mechanism of Fig. 2.

In one important method of reception of telegraphic code, an electro-mechanical device known as a tape recorder is employed to convert the received electrical code impulses into visible code characters which are printed or otherwise inscribed on a narrow tape, usually of paper. Afterwards, this tape is passed in front of a trained operator who visually notes the code characters appearing thereon and manually, by

typewriter, transcribes the letter, numeral or other equivalents thereof.

In such a method of reception, highly trained operators are required. Furthermore, the task of transcribing by typewriter the equivalents of the code characters by visual observation is tion of the electrical arduous and tiring, and errors iiievitably creep in. In addition, depending on the volume of traffic and the availability of transcribing operators, t ere is always delay between the time of recepimpulse and the actual transcribing of the letter, numeral or other equivalents of the code characters.

My invention provides a device, which completely eliminates the operator in the above method of reception and performs his function accurately and without delay. The tape from the tape recorder is automatically fed into my device .and the code characters inscribed on the tape are made to control, by means of its mechanism, agroup o1 solenoids which actuate the keys of a conventional telegraphic typewriter. How-this is accomplished is explained in the following paragraphs.

Referring to Fig. 1, variable speed tape pulling motor 22 has on its shaft a roller 23 (not shown) which rotates with the shaft and around which is rolled tape 24 from the tape recorder. As

roller 23 rotates, the flat side of tape 24 upon which the code characters have been inscribed passes adjacent to lens 25, which is so positioned as to receive and transmit'to photocell 21 the light reflected from fixed point 26. Tape 24 is fed adjacent to lens 25. such that the inscribed lines forming the flat peaks of the code characters inscribed on the tape pass through flxed'point 26. A light source 28 (not shown) is disposed so as to generally illuminate the surface of the tape 24 in the vicinity of fixed point 26, but not to illuminate either lens 25 or photocell 21 directly. Photocell 21 is connected to amplifier 28' the output of which eneronly -' gizes relay magnet 29 in accordance with the code characters appearing on the tape.

A constant speed motor 30 has on its shaft insulated commutators 31 and 32 and rotates them at a given constant speed of, say, 360

R..P. M., and, through a 15-to-1 reduction gear 33, also rotates magnetically operated clutch 34 at one-twenty-fourth of the speed of commutators 3| and 32, or, as in' this example, at 15 R. P. M.

Relay magnet 29 operates armatures 35,- 36, 3t

and 38. Armatures 35, 36 and 31 are normally sprung clear-of spring contacts 39, 40 and M, respectively, and make contact therewith only when relay magnet-29 is energized. Armatures 36 and 31 are each connected to the positive side of the D. C. line through a suitable energy dissipating resistor while armature 'is connected to ground. Armature 38, when relay magnet 29 is not energized, is sprung away from magnet 29 and bears against spring contact 43. When relay magnet 29 is energized, armature 38 moves toward it, but spring contact 49 iollowsand continues to touch armature 38 momentarily after it touches spring contact 42, immediately after which the electrical connection between armature 38 and spring contact 43 is broken, and armature 38 now bears against spring contact 42. When relay magnet 29 is de-energized, armature 38, by its own spring action, returns to its normal position away from magnet 29, but spring contact 42 follows it for a part of its travel and continues to touch it momentarily after it reaches and begins to bear against spring contact 43, immediately after which electrical contact with spring contact 42 is broken. Thus, in its movement toward or away from relay magnet 29, armature 38 for a brief instant touches both spring contacts 42 and 43 and completes the electrical circuit between them, but at all other times this circuit is broken.

The negative side of the D. C. voltage employed throughout this device is connected to ground.

Spring contact 43 is connected to the positive side of the D. C. line through a suitable energy dissipating resistor. Spring contact 42 connects to brushes 44 and 45, the former in contact with one or a pair of slip rings connected to neon bulb 46' which rotates with commutator 3|, the latter disposed in contact with split commutator 32, made up on segments 46 and 41, with insulating segments between. The remaining terminal of neon bulb 46' is connected to ground through the remaining 01 the aforementioned slip rings and brush 55. Segment 46 is connected by means of a slip ring (not shown) and a brush (not shown) to one terminal of the field winding 48 of potentiometer motor 49. while segment 41 is connected to the other terminal of field winding 48 in a similar manner. Each terminal oi field winding 48 is also connected to one terminal of a capacitor 58, the other terminal of each capacitor I being connected to ground. There is a tap at or near the centerof field winding 48 which is connected to the positive terminal of the armature oi! potentiometer motor 49, the other terminal of the armature of this motor being grounded. The shaft of potentiometer motor 49 operates by suitable gearing slider on field resistor 52 of tape puller motor 22. Motor 22 is connected across the D. C. line. Manually controlled rheostat 53 is inserted in the field circuit of motor 22 in series with field winding 54 and rheostat 52.

Contact disc 56 has twenty-one spaced contacts thereon numbered 1 to 21 inclusive. Contacts 2 to I9 inclusive are connected respectively to one terminal of code bar solenoids 68 to 11 inclusive, the other terminal of each or the code bar solenoids being connected to the positive side of the D. C. line. Contact I is not a part of any electrical circuit of the device but contact arm 51 rests upon it when in its normal position held against stop pin 58 by spiral spring 59. Contact arm 5! is connected to spring contact 39; contact 2| is connected to spring contact 48. One terminal of clutch magnet 18 connects to ground while the other terminal connects to spring contact 48. Secondary relay magnet 19, likewise connected between spring contact 48 and ground, actuates two armatures 88 and 8|, armature 88 connected to armature 36 and armature 8| connected to the positive side of the D. C. line through a suitable energy dissipating resistor. Armature 8| is normally sprung in contact with spring contact 82 which connects to the terminal of normal bar solenoid 83 that is not connected to ground. The electrical circuit is completed between spring contact 84 and armature 8|, and between spring contact 85 and armature 88 when secondary relay magnet I9 is energized. Spring contact 85 connects to spring contact 48, spring contact 84 to the one terminal of each of the letter bar solenoids 86.

Two brushes 81 and 88 are disposed to bear against armature 3|, brush 81 connected to the positive side of the D. C. line through a suitable energy dissipating resistor and brush 88 connected to one terminahpt'cog-wheel rotating relay magnet 89, the other terminal of magnet 89 being connected to ground. Armature 98 is rigidly connected to cog-wheel operating dog 9|. Cog-wheel 92 has on its rim a group of five cogs disposed to be engaged alternately by cog-wheel operating dog 9|, and diametrically opposite another group of four cogs which are positioned to be engaged by cog-wheel retaining dog 99 when the cog-wheel is rotated. A spiral spring 93 acts to oppose counter-clockwise rotation 01 cog-wheel 92 and to hold stop 93', rigidly attached to the rim of the cog-wheel, against fixed stop pin 94. Cog-wheel operating dog 9| is slidably connected to a distance piece 94 which is rigidly secured to the armature 95 of one oi. the dog disengaging relays. Spring 96, attached to cog-wheel operating dog 9|, acts to hold armature 98 away from magnet 89, whereas spring 91 acts to hold armature 95 away from dog disengaging magnet 98, and thus in a position to engage, one at a time, the group of five dogs on cog-wheel 92. Retaining dog 99 is slidably connected to distance piece I88 which is rigidly connected to armature |8I. Spring I82 acts to hold armature I 8| away from retaining dog disengaging magnet I83 and to hold retaining dog 99 in a position to engage, one at a time, the group of four cogs on cog-wheel 92. One terminal of each of the magnets 98 and I83 is connected to spring contact 4|, the other terminal of both magnets is grounded. A rotating arm I84 is mounted on the same shaft as cog-wheel 92 and rotates with it, alternately touching fixed contacts 8', I', 2', 3' and 4' on insulating disc I85, if rotated sufficiently. Contacts 8 and I have no electrical connection thereto; contact 2' connects to the remaining terminal of each letter bar solenoid 86, contact 3 is connected to spring contact 48, and contact 4' is connected -to one terminal of space bar solenoid I86, the other terminal of which connects to the positive side of the D. C. line through a suitable energy dissipating resistor. Rotating arm I 84 is electrically connected to ground.

Referring to Figs. 2, 3, 4 and 5, code bar plungers |8'I to |24 inclusive are operated respectively by code bar solenoids 68 to T! inclusive, and are linked to code bars I25 to I42 inclusive, respectively. Plunger I43 is actuated by normal bar solenoid 83 and is linked to cross-bar I 44 which engages a slot in the lower surface of each code bar. The lower edge of each of the code bars, I25 to I42 inclusive, is slotted transversely, according to a definite pattern depending upon the particular code with which the device is employed. The arrangement of these slots in the code bars will be more fully covered in the explanation of the operation of this device. Letter bars I45' to I88 inclusive, denominated A to Z g of which there is one for each and 1 to respectively on Fig. mare disposed under the code bars and transversely thereto, such that any letter bar may be pushed upward into the aforementioned slots in the code bars when the code bars are aligned for that particular letter or number, and only then.

Two letter bar solenoids 86 are disposed under each letter bar and each solenoid 86 actuates a plunger I8I (Fig. 3) which is attached through a spring I82 to the letter bar. A spring contact I88 is attached to and moves up and down with each letter bar and when the alignment of the'slots in the code bars is such that a particular letter bar may be pushed upward into these slots, this contact I83 touches a fixed spring contact I84 and makes electrical contact therewith. One terminal of each of the key actuating solenoids l85 to 228 inclusive connects to a separate contact I84, of the letter bars. The remaining terminal of each of the key actuating solenoids is electrically grounded.

Figs. 4 and 5 illustrate the slot pattern of two of the code bars, I42 and I25 respectively, with a single slot in code bar I42 extending nearly the entire length of the bar, and a plurality of narrow, transverse slots in code-bar I25, each slot wide enough for one of the letter bars to fit freely therein.

The operation of the synchronizing mechanism and the indicator therefor will first be explained. This will be followed by an explanation of the operation of the remainder of the device in connection with a specific group of code characters inscribed on the tape.

Photocell 21 and amplifier 28' are so designed that when the light reaching photocell 21 falls below a certain critical amount, relay magnet 29 will be energized, and when the light reachingthe photocell exceeds this amount, relay magnet 29 will be de-energized. Thus, when a black line, such as is inscribed on tape 24, reaches fixed point 26 the amount of light reflected from the tape 24 to photocell 21 is reduced below thecritical amount. Relay magnet 29 is then energized and will continue to remain energized until the amount of light to reach photocell 21 exceeds the critical amount. This occurs at the termination of the black line appearing on the tape or, in other words, when the tape is white. Magnet 29 will remain de-energized as long as the tape remains white. Thus, relay magnet 29 is energized when fixed point 26 changes from light to dark and is de-energized when the point changes from dark to light.

I As armature 38 momentarily closes the circuit between spring contacts 42 and 43, which occurs whenever relay magnet 29 is either energized or de-energized, the positive D. C. circuit is closed to brushes 44 and 45. This will cause neon bulb 46' to fiash and, if the commutator 3| is in the position shown in Fig. 1 at this instant, the bulb will bevisible and will appear in a vertical position. As shown in Fig. 1, brush is in contact with neither segment 46 nor segment 41 of commutator 32 at this instant but touches the insulating segment between these brushes. With commutators 3| and 32 in the position shown when brushes 44 and 45 are energized, armatures 35, 36, 31 and 38 are synchronized with the speed of commutators 3I and 32, the speed with which tape 24 is passing fixed point 26 is correct and hence the tape puller motor 22 is operating at the correct speed for synchronism. But if, for example, tape 24 is transiting fixed point 26 too slowly at the time when the circuit is completed between spring contacts 42 and 43 and hence brushes 44 and 45 are energized, brush 45 will be in contact with segment 46, current will flow through brush 45, segment 46, the upper half (as shown) of field winding 48 and through the tap to the armature of potentiometer motor 49 causing it to rotate for an instant and move slider 5| on rheostat 52 so as to short circuit a smaller portion of rheostat 52. This would decrease the field current of tape puller motor Hand increase the speed of the armature thereof. If, on the other hand, tape 24 is transiting fixed point 26 too rapidly, segment 41 will be in contact with brush 45 at the instant brush 45 is energized and tical when it flashes but will appear inclined to 7 one side of the vertical or the other depending on whether motor 22 is running too fast or too slow.

'Rheostat 63 is inserted in the field circuit of motor 22in order to manually bring its speed within the range where it can be automatically controlled by rheostat 52. Capacitors 58 serve to store energy to insure adequate rotation of motor 49 after each impulse. Neon bulb 46', which serves as an indicator for synchronism, is contained within commutator 3| and is masked by it except when the bulb may be viewed in a vertical position, or nearly so.

Assume, for example, there appears on the tape 24, code characters representing the letter A. in the Continental Code. In such a case as the tape moves along there will pass through fixed point 26 a line one impulse long, followed by a space one impulse long. followed by a line three impulses long, followed by no more lines. At the start of the first impulse (I" on tape 44, Fig.

1). fixed point 26 will appear black and the 8 amount of light reaching photocell 21 will be abruptly reduced. Relay magnet 29 will be energized, will remain energized aslong as fixed point 26 is-black, and will attract armatures 35., 36, 31 and 38 toward it. Armature 36 closes the circuit from the positive side of the D. C. line to clutch magnet I8 and to secondary relay magit being synchronized with the speed of motor 38 by the aforementioned synchronizing system, positive brush 8! makes contact with commutator 3| rotated by constant speed motor 38, and the electrical circuit is completed via. brush 88. This energizes magnet 89 which attracts armature 98 and with it cog-wheel operating dog 9|. But cog-wheel operating dog 9I does not engage any of the cogs on cog-wheel 92 because armature 31, attracted by relay 29, has closed the electricalcircuit to magnets 98 and I83 and both cog-wheel operating dog ,9I and cog-wheel retaining dog 69 are pulled clear of the dogs on cog-wheel".

At the beginning of the second impulse 2", fixed point 26- is light, and relay magnet 26 is deenergized permitting armatures 36, 36, 31 and 36 to return to their normal positions. Armature 66 will momentarily close the contact to the synchronizing system as previously explained but the electrical circuits of armatures 36, 36 and 61 will open and will remain open during the period that fixed point 26 is light. Secondary relay magnet I9 will, however, remain energized through the parallel circuit through armature 66 and spring contact 66 and both armatures 66 and 6I will remain in contact with spring contacts 65 and 66 respectively. Relay magnet 66 will be energized at the instant commutator 3I comes in contact with brush 6! and armature 96 and cog-wheel operating dog M will beattracted thereto, dog 9| engaging the nearest cog on cog-wheel 32 and rotating cog-wheel 92 one step counter-clockwise. Retaining dog 99 will then engage the second of the group of four dogs on the opposite side of cog-wheel 92. Rotating arm I66, rotating with cog-wheel 92, will then move to contact I' on disc I65. At the beginning of this second impulse, clutch magnet I6 having remained energized along with secondary relay magnet I9, contact arm 51 has reached contact 2 on disc 56, but since the electrical contact at armature 35 is open solenoid 66 is notenergized.

At the beginning of the third impulse 3", fixed point 26 becomes dark, relay magnet 29 is energized, armatures 35, 36, and 31 close their respective contacts and armature 36 makes its usual momentary contact. But magnets 96 and I63 are again energized pulling dogs 9| and 99 clear of the cogs on cog-wheel 92 which returns to its normal position under the influence of spring 93 with stop 93' in contact with fixed pin 96, and rotating arm I66 returns to contact 6' on disc I65. But clutch 36 having remained engaged, contact arm 51 has reached contact 3 on disc 56, and the electrical circuit is completed from the positive D. C. line through solenoid 6|, armature 51, spring contact 39 and armature 35 to ground, thus energizing solenoid 6|, which ac-' tuates plunger I66, pulling forward code bar I2 (Fig.2).

At the beginning of the fourth impulse 6, magnet 29 remaining energized, dog 9| whenactuated by magnet 89 is still held away from cogwheel92 by magnet 96. Clutch '36 still remains engaged and contact arm reaches contact 6 on disc 56. Solenoid 62 is-then energized and code bar I21 is moved forward by plunger I69. At the beginning of the fifth impulse5", the action is the same as for impulse 6", except that arm 51 has moved to contact 5 on disc 56. Solenoid 63 is then energized and code bar I26 is moved forward by plunger I I6.

, At the beginning of the sixth impulse 6", fixed point 26 is light, relay magnet 29 is de-energized and the circuits containing armatures 35, 36 and '31 are opened, armature 36 making its usual momentary contact. Here, as at the beginning of the second impulse 2", cog-wheel operating dog 9| rotates cog-wheel 92 one step counter-clockwise, retaining dog 99 holds cog-wheel 92 in place after rotation, and rotating arm I66 moves to contact I' on disc I65. Magnet I6 still remaining energized contact arm 61 moves to contact 6 on disc 66, but as the circuit at armature 35 is broken, solenoid 66 is not energized.

Atthe beginning of the seventh impulse I". clutch 36 still remaining closed, contact arm 61 reaches contact I on disc 66, but solenoid 66 is not energized due to the open circuit at armature 66. Magnet 26 remains de-energized. cog-wheel operating dog 6I rotates cog-wheel 62 another step counter-clockwise,.retaining dog 66 engages the next cog on the opposite side and holds the cog-wheel 62 in place and rotating arm I66 has moved to contact 2'. This completes the electrical circuit from the positive D. C. line through armature 6|, spring contact 66, letter bar solenoids 66 and rotating arm I66 to ground, energizing the letter bar solenoids 66. These solenoids 66 attract plungers I6I upwards and through springs I62 exert an upward force on each letter bar. But the upward movement of all, the letter bars, except one (A bar I66), is prevented by the code bars. With the code bars aligned by the code characters employed in this example, there is a transverse slot in each of the code bars directly above the A letter bar I66 into which this letter bar can rise. With the code bars in their normal positions, all the code bars except I26, I21 and I26 have a slot therein above letter bar I65, and when these three code bars are pulled forward as in this example, a slot in each of these three bars is moved above letter bar I65; thus completing the alignment of the slots above this letter bar and permitting it to rise when letter bar solenoids 66 are energized. Since the upward movement of the remaining letter bars is prevented by non-alignment or the slots in the code bars above them, the upward movement of plungers I6I under these letter bars results only in partial compression of springs I62.

As A letter bar I65 is pushed upward into the aligned slots in the code bars, movable contact I63 touches fixed spring contact I66 and the electrical circuit is completed to key actuating solenoid I65 which actuates the A key of a conventional telegraphic typewriter. As soon as arm I66 ceases to touch contact 2" on disc I65, letter bar solenoids 66 are de-energized, and A letter bar I65 drops by gravity into its normal position below the code bars.

At the beginning of the eighth impulse 6", arm 51 has rotated to contact 6, but as the electrical circuit of armature 35 is broken, solenoid.

66 is not energized. Cog-wheel 92 is rotated another step counter-clockwise by dog 9 I, is held in place by retaining dog 69, and arm I66 moves to contact 3. This short circuits secondary magnet 19 and clutch magnet 16. Secondary magnet I9 releases armatures 66 and 6|, the latter of which springs against spring contact 62 and closes the electrical circuit to energize normal bar solenoid 63. Normal bar solenoid 63 attracts plunger I63 (Fig. 2) which pulls with it crossbar I66 toward solenoid 63. This movement of cross-bar I66 returns to their normal positions all the code bars that have previously been moved therefrom by the code bar solenoids. When clutch magnet 16 is short circuited, magnetic clutch 36 is disengaged and contact arm 61 is rotated clockwise to its normal position on contact I by spring 59.

At the beginning of the ninth impulse 9" cogwheel 92 is advanced another step counter-clockwise and arm I66 moves to contact 6'. This completes the electrical circuit to space solenoid I66 and energizes this solenoid which operates the space key of the typewriter. But since there are no more cogs on cog-wheel 92 for retaining dog 99 to engage. it having engaged the fourth and last cog when arm I04 reached contact 3', arm I04 now moves back to contact 3' on disc I 05. on each succeeding space impulse before another code dot or dash character appears at fixed point 28, arm I04 is rotated to contact 4' momentarily, thus energizing space solenoid I06 and operating the space key of the typewriter, after which arm I04 moves back to contact 3'.

When the beginning of another code character reaches fixed point '26, relay 29 is energized, armature 31 closes the electrical circuit with spring contact 4| and magnets 98 and I03 are energized, lifting dogs 9| and 99 free from cogwheel 92 which rotates clockwise under the infiuence of spring 93 to its normal position with stop 93' bearing against fixed pin 94.

If the code character appearing on the tape in this example had represented the letter R (dot-dash-dot), instead of the letter A (dotdash), an additional line one impulse long would have appeared at fixed point 25 at the beginning of impulse I". In this case, relay magnet 28 would have been energized at the beginning of impulse 'I" which would have caused the release of cog-wheel 92 before arm I04 reached contact 2' on disc I05. Also, code bar solenoid would have been energized at the beginning of impulse 1" which would have resulted in code bar I30 being pulled from its normal position toward solenoid 5. This movement of code bar I30 would have no longer left a slot in this code bar directly above A letter bar I45 but would instead have moved a slot above R letter bar I52. All other code bars having previously a slot above letter bar I92 this movement of code bar I30 would have formed a complete line of slots above letter bar I62 and, when the letter bar solenoids 86 were later energized, this time on impulse I0", R letter bar E62 would be pushed upward into the slots and, through key solenoid 202, the R key of the typewriter would have been operated.

Returning to the beginning of impulse 9",

should there have appeared on the tape, codecharacters representing another letter following those representing the letter A, the energizing of relay magnet 29 at the beginning of the first character would have released dogs 9i and 99 and cog-wheel 92 would have returned to its normal position. Armature I04 would not then have moved to contact 4' but would instead have returned to contact 0', and the space key of the typewriter would not have been operated. The mechanism would then have been actuated 'by the code characters representing this next letter in the same manner as for the letter A or R, a different group of code bars would have been moved forward such that the slots therein would have been aligned only for that particular letter, the pattern of slots in the code bars being such as to achieve this result.

In the continental code, the code characters representing all the English letters and the numerals 1 to 0, inclusive, vary in length from one unit impulse for the letter E, to, I9 unit impulses for the numeral zero. Contacts I to I9 inclusive, provided on disc 58, permit the use of any code character in this code, or any other codeutilizing not more than I9 unit impulses for any particular letter, numeral or other equivalent. Obviously, the number of contacts on disc 56 may be varied to suit any particular code that it may be desired to employ. Of course, the code bars slotted for the continental code will not be suitable for a diiferent code.

In case there appears on tape 24 only a series of dots, which is convenient for adjusting the mechanism for synchronism, arm 51 on disc 56 will continue to be rotated because no series of three space impulses occurs to short circuit clutch magnet 18 and disengage clutch 34. But arm 51 will not rotate indefinitely, for when it touches contact 2| on disc 56, clutch magnet I8 is short circuited through armature 35 and spring contact 39, and magnetic clutch 34 is repulse and for each succeeding space impulse with no intervening code character, the typewriter space bar is operated.

It will be understood that the above description and accompanying drawings comprehend only the general and preferred embodiment of the invention, and that various other changes in the construction, proportion and arrangement of the parts may be made by those skilled in the art without'departing from the nature and scope of the invention as defined in the appended claims.

The invention described herein may be manufactured and/or used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

I claim:

1. A code transcribing device, comprising a tape feeding means, a tape illuminating means, a relay energizing means controlled by the amount of light reflected from a portion of a moving tape upon which representations of code characters have been inscribed, a multi-contact relay means energized by said relay energizing means, a code bar sliding solenoid selecting means, a-magnetically operated clutch therefor and a plurality of code bar sliding solenoids selectable thereby, a synchronizing means for said tape feeding means, said relay means and said code half .sliding solenoid selecting means, an indicating means'for such synchronism, a rotatable cogwheel means, a cogwheel-rotating dog means magnetically actuated at periodic equal intervals, a magnetically actuated cogwheel-retaining dog means, a magnetically operated cog-wheel rotating dog disengaging means, a magnetically operated cogwheel-retaining dog-disengaging means,. an auxiliary selecting means the selecting arm of which is rotatable with said cogwheel, a telegraphic typewriter space bar operating solenoid selectively controlled by said auxiliary selector, a secondary relay means, a code bar normal positioning solenoid controlled thereby, a plurality of letter bar lifting solenoids controlled by said auxiliary selecting means and said secondary relay means, a plurality of transversely slotted code bars longitudinally slidable by said code bar sliding. solenoids when selectively energized, a plurality of letter bars disposed under said code bars and transversely thereto, and a plurality of telegraphic typewriter key actuating solenoids selectively controlled by the vertical movement of circuit for said secondary relay means and said magnetic clutch means, said relay means controlling the energization of said selectable code bar sliding solenoids, both said dog disengaging means, said secondary relay, and said magnetic clutch, said relay means supplying a momentary controlling pulse to said synchronizing and said indicating means.

2. A code transcribing device, comprising a tape feeding means, a relay energizing means controlled by the amount of light reflected from a portion of a moving tape upon which representations of code characters have been inscribed, a multi-contact relay means energized by said relay energizing means, a code bar sliding solenoid selecting means, a magnetically operated clutch therefor and a, plurality of code bar sliding solenoids selectable thereby, a synchronizing means for said tape feeding means, said relay means and said code bar sliding solenoid selecting means, an indicating means for such synchronism, a rotatable cogwheel means, a cogwheel-rotating dog means magnetically actuated at periodic equal intervals, a magnetically actuated cogwheel-retaining dog means, a magnetically operated cogwheel-rotating dog-disengaging means, a magnetically operated cogwheel-retaining dog-disengaging means, an auxiliary selecting means the selecting arm of which is rotatable with said cogwheel, a telegraphic typewriter space bar operating solenoid selectively controlled by said auxiliary selector, a secondary relay means, a code bar normal positioning solenoid controlled thereby, a plurality of letter bar lifting solenoids controlled by said auxiliary selecting means and said secondary relay means, a plurality of transversely slotted code bars longitudinally slidable by said code bar sliding solenoids when selectively energized, a plurality of letter bars disposed under said code bars and transversely thereto, and a plurality of telegraphic typewriter key actuating solenoids selectively controlled by the vertical movement of said letter bars, said secondary relay means and said auxiliary selecting means controlling the energization of an auxiliary parallel energizing circuit for said secondary relay means and said magnetic clutch means, said relay means controlling the energization of said selectable code bar sliding solenoids, both said dog disengaging means, said secondary relay, and said magnetic clutch," said relay means supplying a momentary controlling pulse to said synchronizing and said indicating means.

3. A code transcribing device, comprising a tape feeding means, a relay energizing means controlled by the amount of light reflected from a portion of a moving tape upon which representations of code characters have been inscribed, a multi-contact' relay means energized by said relay energizing means, a code bar sliding solenoid selecting means, a magnetically operated clutch therefor and a plurality of code bar sliding solenoids selectable thereby, a synchronizing means for said tape feeding means, said relay means and said code bar sliding solenoid selecting means, a rotatable cogwheel means, a cogwheel-rotating dog means magnetically actuated at periodic equal intervals, a magnetically actuated cogwheel-retaining dog means, a magnetically operated cogwheel-rotating dog-disengaging means, a magnetically operated cogwheel retaining dog-disengaging means, an auxiliary selecting means the selecting arm of which is rotatable with said cogwheel, a telegraphic typewriter space bar operating solenoid selectively controlled by said auxiliary selector, a secondary relay means, a code bar normal positioning solenoid controlled thereby, a plurality of letter bar lifting solenoids controlled by said auxiliary selecting means and said secondary relay means, a plurality f transversely slotted code bars longitudinally slidable by said code bar sliding solenoids when selectively energized, a plurality of letter bars disposed under said code bars and transversely thereto, and a plurality of telegraphic typewriter key actuating solenoids selectively controlled by the vertical movement of said letter bars, said secondary relay means and said auxiliary selecting means controlling the energization of an auxiliary parallel energizing circuit for said secondary relay means and said magnetic clutch means, said relay means controlling the energization of said selectable code bar sliding solenoids, both said dog disengaging means, said secondary relay, and said magnetic clutch, said relay means supplying a'momentary controlling pulse to said synchronizing means.

4. A code transcribing device, comprising a tape feeding means, a relay energizing means controlled by the amount of light reflected from a portion of a moving tape upon which representations of code characters have been inscribed, a multi-contact relay means energized by said relay energizing means, a code bar sliding solenoid selecting means, a magnetically operated clutch therefor and a plurality of code bar sliding solenoids selectable thereby, a synchronizing means for said tape feeding means, said relay means and said code bar sliding solenoid selecting means, a rotatable cogwheel means, a cogwheel-rotating dog means magnetically actuated at periodic equal intervals, a magnetically actuated cogwheel-retaining dog means, a magnetically operated cogwheel-rotating dog-disengaging means, a magnetically operated cogwheel retaining dog-disengaging means, an auxiliary selecting means the selecting arm of which is rotatable with said cogwheel, a telegraphic typewriter space bar operating solenoid selectively controlled by said auxiliary selector, a secondary relay means, a code bar normal positioning solenoid controlled thereby, a plurality of letter bar lifting solenoids controlled by said auxiliary selecting means and said secondary relay means, a plurality of transversely slotted code bars longitudinally slidable by said code bar sliding solenoids when selectively energized, a plurality of letter bars disposed under said code bars and transversely thereto, and a plurality telegraphic typewriter key actuating solenoids selectively controlled by the vertical movement of said letter bars, said secondary relay means and said auxiliary selecting means controlling the ener gization of an auxiliary parallel energizing circuit for said secondary relay means and said magnetic clutch means.

5. A code transcribing device, comprising a tape feeding means, a relay energizing means con- -trolled by the amount of light reflected from a portion of a moving tape upon which representations of code characters have been inscribed, a multi-contact relay means energized by said relay energizing means, a code bar sliding solenoid selecting means, a magnetically operated clutch therefor and a plurality of code bar sliding solenoids selectable thereby, a synchronizing means for said tape feeding means, said relay means and said code bar sliding solenoid selecting means, a rotatable cogwheel means, a cogwheelrotating dog means magnetically actuated at periodic equal intervals, a magnetically actuated cogwheel retaining dog means, a magnetically operated cogwheel-rotating dog-disengaging means, a magnetically operated cogwheel-retaining dog-disengaging means, an auxiliary selecting means the selecting arm of which is rotatable with said cogwheel, ,a telegraphic typewriter space bar operating solenoid selectively controlled by said auxiliary selector, a secondary relay means, a code bar normal positioning solenoid controlled thereby, a plurality of letter bar lifting solenoids controlled by said auxiliary selecting means and said secondary relay means, a plurality of transversely slotted code bars longitudinally slidable by said code bar sliding solenoids when selectively energized, a plurality of letter bars disposed under said code bars and transversely thereto, and a plurality of telegraphic typewriter key actuating solenoids selectively controlled by the vertical movement of said letter bars.

6. A code transcribing device, comprising a tape feeding means, a relay energizing means controlled by the amount of light reflected from a portion of a moving tape upon which representations of code characters have been inscribed, a multi-contact relay means energized by said relay energizing means, a code bar sliding solenoid selecting means, a magnetically operated clutch therefor and a plurality of code bar sliding solenoids selectable thereby, a synchronizing means for said tape feeding means, said relay means and said code bar sliding solenoid selecting means, a rotatable cogwheel means, a cogwheel-rotating dog means magnetically actuated at periodic equal intervals, a magnetically actuated cogwheel-retaining dog means, a magnetically operated cogwheel-rotating dog-disengaging means, a magnetically operated cogwheelretaining dog-disengaging means, an auxiliary selecting means the selecting arm of which is rotatable with said cogwheel, a telegraphic typewriter space bar operating solenoid selectively controlled by said auxiliary selector, a secondary relay means, a code bar normal positioning solenoid controlled thereby, a plurality of letter bar lifting solenoids controlled by said auxiliary selecting means and said secondary relay means, a plurality of transversely slotted code bars. longitudinally slidable by said code bar sliding solenoids when selectively energized, a plurality of letter bars disposed adjacent to said code bars and transversely thereto, and a plurality of telegraphic typewriter key actuating solenoids selectively controlled by the vertical movement of said letter bars.

7. In combination with a telegraphic typewriter, a code transcribing device, comprising a tape feeding means, a tape illuminating means, a relay energizing means controlled by the amount of light reflected from a portion of a moving tape upon which representations of code characters have been inscribed, a multi-contact relay means energized by said relay energizing means, a code bar sliding solenoid selecting means, a magnetically operated clutch therefor and a plurality of code bar sliding solenoids selectable thereby, a synchronizing means for said tape feeding means, said relay means and said code bar sliding solenoid selecting means, an indicating means for such synchronism, a rotatable cogwheel means, a cogwheel-rotating trolled by dog means magnetically actuated at periodic equal intervals, a magnetically actuated cogwheel-retaining dog means, a magnetically actuated cogwheel-rotating dog-disengaging means, a magnetically actuated cogwheel-retaining dogdisengaging means, an auxiliary selecting means the selecting arm of which is rotatable with said cogwheel, a solenoid selectively controlled by said auxiliary selector for operating the space bar'of said typewriter, a secondary relay means, a code bar normal positioning solenoid controlled thereby, a plurality of letter bar lifting solenoids controlled by said auxiliary selecting means and said secondary relay means, a plurality of transversely slotted code bars longitudinally slidable by said code bar sliding solenoids when selectively energized, a plurality of letter bars disposed under said code bars and transversely thereto, and a plurality of solenoids selectively controlled by the vertical movement of said letter bars for actuating the letter and numeral keys of said typewriter, said secondary relay means and said auxiliary selecting means controlling the energization of an auxiliary parallel energizing circuit for said secondary relay means and said magnetic clutch means, said relay means controlling the energization of said selectable code bar sliding solenoids, both'said dog disengaging means, said secondary relay means and said magnetic clutch means, said relay means supplying a momentary controlling pulse to said synchronizing means and said indicating means.

8. In combination with a telegraphic typewriter, a code transcribing device, comprising a tape feeding means, a relay energizing means controlled by the amount of light reflected from a portion of a moving tape upon which representations of code characters have been inscribed, a multi-contact relay means energized by said relay energizing means, a code bar sliding solenoid selecting means, a magnetically operated clutch therefor and a plurality of code bar sliding solenoids selectable thereby, a synchronizing means for said tape feeding means, said relay means and said code bar sliding solenoid selecting means, an indicating means for such synchronism, a rotatable cogwheel means, a cogwheelrotating dog means magnetically actuated at periodic equal intervals, a magnetically actuated cogwheel-retaining dog -means, a magnetically actuated cogwheel rotating dog disengaging means, a magnetically actuated cogwheel-retaining dog-disengaging means, an auxiliary selecting means theselecting arm of which is rotatable with said cogwheel, a solenoid selectively consaid auxiliary selector for operating the space bar of said typewriter, a secondary relay means, a code bar normal positioning solenoid controlled thereby, a plurality of letter bar lifting solenoids controlled by said auxiliary selecting means and said secondary relay means, a plurality of transversely slotted code bars longitudinally slidable by. said cede bar sliding solenoids when selectively energized, a plurality of letter bars disposed under said code bars and transversely thereto, and a plurality of solenoids selectively controlled by the vertical movement of said letter bars for actuating the letter and numeral keys of said typewriter, said secondary relay means and said auxiliary selecting means controlling the energization of an auxiliary parallel energizing circuit for said secondary relay means and said magnetic clutch means, said relay means controlling the energization of said selectable code bar sliding solenoids, both said dog disengaging means, said secondary relay means and said magnetic clutch means, said relay means supplying a momentary controlling pulse to said synchronizing means and said indicating means.

9. In combination with a telegraphic typewriter,- a code transcribing device, comprising a tape feeding means, a relay energizing means controlled by the amount of light reflected from a portion of a moving tape upon which representations of code characters have been inscribed, a multi-contact relay means energized by said relay energizing means, a code bar sliding solenoid selecting means, a magnetically operated clutch therefor and a plurality of code bar sliding solenoids selectable thereby, a synchronizing means for said tape. feeding means, said relay means and said code bar sliding solenoid selecting means, a rotatable cogwheel means, a cogwheel-rotating dog means magnetically actuated at periodic equal intervals, a magnetically actuated cogwheel-retaining dog means, a magnetically actuated cogwheel-rotating dog-disengaging means, a magnetically actuated cogwheel-retaining dog-disengaging means, an auxiliary selecting means the selecting arm of which is rotatable with said cogwheel, a solenoid selectively con trolled by said auxiliary selector for operating the space bar of said typewriter, a secondary relay means, a code bar normal positioning solenoid controlled thereby,-a plurality of letter bar lifting solenoids controlled by said auxiliary selecting means and said secondary relay means, a plurality of transversely slotted codle bars longitudinally slidable by said code bar sliding solenoids when selectively energized, a plurality of letter bars disposed under said code bars and transversely thereto, and a plurality of solenoids selectively controlled by the vertical movement of said letter bars for actuating the letter and numeral keys of said typewriter, said secondary relay means and said auxiliary selecting means controlling the energization of an auxiliary parallel energizing circuit for said secondary relay means and said magnetic clutch means, said relay means controlling the energization of said selectable code bar sliding solenoids, both said dog disengaging means, said secondary relay means and said magnetic clutch means, said relay means supplying a momentary controlling pulse to said synchronizing means.

10. In combination with a telegraphic typewriter, a code transcribing device, comprising a tape feeding means, a relay energizing means controlled by the amount of light reflected from a portion of a moving tape upon which representations of code characters have been inscribed, a multi-contact relay means energized by said relay energizing means, a code bar sliding solenoid selecting means, a magnetically operated clutch therefor and a plurality of code bar sliding solenoids selectable thereby, a synchronizing means for said tape feeding means, said relay means and said code bar sliding solenoid selecting means, a rotatable cogwheel means, a cogwheelrotating dog means magnetically actuated at periodic equal intervals, a magnetically actuated cogwheel-retaining dog means, a magnetically actuated cogwheel rotating dog disengaging means, a magnetically actuated cogwheel-retaining dog-disengaging means, an auxiliary selecting means the selecting arm of which is rotatable with said cogwheel, a solenoid selectively con trolled by said auxiliary selector for operating the space bar of said typewriter, a secondary relay means, a code bar normal positioning solenoid controlled thereby, a plurality of letter bar lifting solenoids controlled by said auxiliary selecting means and said secondary relay means, a plurality of transversely slotted code bars longitudinally slidable by said code bar sliding solenoids when selectively energized, a plurality of letter bars disposed under said code bars and transversely thereto, and a plurality of solenoids selectively controlled by the vertical movement of said letter bars for actuating the letter and numeral keys of said typewriter, said secondary relay means and said auxiliary selecting means controlling the energization of an auxiliary parallel energizing circuit for said secondary relay means and said magnetic clutch means.

11. In combinationwith a telegraphic typewriter, a code transcribing device, comprising a tape feeding means, a relay energizing means controlled by-the amount of light reflected from a portion of a moving tape upon which representations of code characters have been inscribed, a multi-contact relay means energized by said relay energizing means, a code bar sliding solenoid selecting means, a magnetically operated clutch therefor and a plurality of code bar sliding solenoids selectable thereby, a synchronizing means for said tape feeding means, said relay means and said code bar sliding solenoid selecting means, a rotatable cogwheel means, a cogwheel-rotating dog means magnetically actuated at periodic equal intervals, a magnetically actuated cogwheel-retaining dog means, a magnetically actuated cogwheel-rotating dog-disengaging meansya magnetically actuated cogwheel-retaining dog-disengaging means, an auxiliary selecting means .the selecting arm of which is rotatable with said cogwheel, a solenoid selectively controlled by said auxiliary selector for operating the space bar of said typewriter, a secondary relay means, a code bar normal positioning solenoid controlled thereby, a plurality of letter bar lifting solenoids controlled by said auxiliary selecting means and said secondary relay means, a plurality of transversely slotted code bars longitudinally slidable by said code bar sliding solenoids when selectively energized, a plurality of letter bars disposed under said code bars and transversely thereto, and a plurality of solenoids selectively controlled by the vertical movement of said letter bars for actuating the letter and numeral keys of said typewriter.

12. In combination with a telegraphic typewriter, a code transcribing device, comprising a tape feeding means, a relay energizing means controlled by the amount of light reflected from a portion of a moving tape upon which representation of code characters have been inscribed, a multi-contact relay means energized by said relay energizing means, a code bar sliding solenoid selecting means, a magnetically operated clutch therefor and a plurality of code bar sliding solenoids selectable thereby, a synchronizing means for said tape feeding means, said relay means and said code bar sliding solenoid selecting means, a rotatable cogwheel means, a cogwheel-rotating dog means magnetically actuated at periodic equal intervals, a magnetically actuated cogwheel-retaining dog means, a mag netically actuated cogwheel-rotating dog-disengaging means, a magnetically actuated cogwheel-retaining dog-disengaging means, an

noid selectively controlled by said auxiliary selector for operating the space bar of said typeiwriter, a secondary relay means, a code bar normal positioning solenoid controlled thereby, a plurality of letter bar lifting solenoids controlled by said auxiliary selecting means and said secondary relay means, a plurality of transversely slotted code bars longitudinally slidable by said code bar sliding solenoids when selectively energized, a plurality of letter bars disposed adjacent to said code bars and transversely thereto, and a plurality of solenoids selectively controlled by the vertical movement of said letter bars for actuating the letter and numeral keys of said typewriter. 1

13. A telegraphic code transcription device comprising a surface, unequal code combinations of markings on said surface representing symbols in'accordance with said code, the spaces between markings in each of said combinations being equal, and the spaces between said combinations being longer than the spaces between said markings within combinations and normally equal, and means to transcribe a series of said unequal code combinations of markings in a length of time determined by the total of the individual lengths of said markings, said means including means to produce an interrupted electric current having periods of flow representative of said markings, means to reproduce said symbols in visual form, means actuated by said interrupted current to select for reproduction by said reproducing means the symbols represented by said combinations, and means actuated by the interruptions of said interrupted current representative of said longer spaces between said combinations to cause said reproducing means to reproduce the symbols selected by said selecting means.

14. A telegraphic code transcription device comprising a tape, unequal code combinations of markings on said tape representing symbols in accordance with said code, the spaces between markings in each of said combinations being equal, and the spaces between said combinations being longer than the spaces between said markings within combinations and normally equal,

and means to transcribe a series of said unequal f code combinations of markings in a length of time determined by the total of the individual lengths of said markings, said means including photo-electric means to produce an interrupted electric current having periods of flow reprer sentative of said markings, means to reproduce said symbols in visual form, means actuated by said interrupted current to select for reproduction by said reproducing means the symbols represented by said combinations, and means actuated by the interruptions of said interrupted current representative of said longer spaces between said combinations to cause said reproducing means to reproduce the symbols selected by said selecting means.

15. A telegraphic code transcription device comprising a tape, unequal code combinations of markings on said tape representing symbols in accordance with said code, the spaces between markings in each of said combinations being equal, and the spaces between said combinations being longer than the spaces between said marking-s within combinations and normally equal, and means to transcribe a series of said unequal code combinations of markings in a length combinations, and ing of said.contact to cause said reproducing said markings of time determined by the total of the individual lengths of said markings, said means including photo-electric means to produce an interrupted electric current having periods of flow repre- 'sentative of said markings, means to reproduce said symbols in visual form, means actuated by said interrupted current-to select for reproduction by said reproducing means the symbols represented by said combinations, a rotating arm actuated by said interrupted current, a contact closed by saidrotating arm on the occurrence of interruptions of said interrupted current representative of said longer spaces between said means actuated by the closmeans to reproduce the symbol selected by said selecting means. v

16. A telegraphic code transcription device comprising a movable tape, unequal code combinations of markings on said tape representing symbols in accordance with said code, the spaces between markings in each of said combinations being equal, and the spaces between said combinations being longer than the spaces between within combinations and normally equal, and means to transcribe a series of said unequal code combinations of markings in a length of time determined by'the total of the individual lengths of said markings, said means including photo-electric means to produce an interrupted electric current having periods of flow representative of said markings, means to reproduce said symbols in visual form, means to move said movable tape, a rotatable contact arm, means to rotate said contact arm, means to synchronize the speed of operation of said last mentioned means and of said means to move said movable tape, rupted current to control rotation of said contact arm, a plurality of movable code bars, means actuated by said contact arm to position said code bars in accordance with said combinations of markings, corresponding to the symbols of said code, means actuated by said interrupted current to move the said letter bar which corresponds to the symbol of said code represented by the then existing position of said code bars, a rotating arm actuated by said interrupted current, a contact closed by said rotating arm on the occurrence of interruptions. of said interrupted current representative of said longer spaces between said combinations, and means actuated by the closing of said contact to cause said reproducing means to reproduce the symbol selected by the said movements of said corresponding letter bars.

17. A telegraphic code transcription device comprising a surface, combinations of markings on said surface representing symbols in accordance with the arrangements of dots and dashes of the International Morse Telegraphic Code, the spaces between markings in each of said combinations being equal to each other and to the means actuated by said intera plurality of movable letter bars said reproducing means the symbols represented by said combinations, and means actuated by the interruptions oi said interrupted current representative of said long spaces between said combinations to cause said reproducing means to reproduce the symbols selected by said selecting means.

18. A telegraphic code transcription device comprising a surface, combinations of markings on said surface representing symbols in accordance with the arrangements of dots and dashes of the International Morse Telegraphic Code, the spaces between markings in each of said combinations being equal to each other and to the length of a dot, and the spaces between such combinations being normally equal to three times the spaces between said markings within combinations, and means to transcribe a series of said unequal code combinations of markings in I symbols represented by said combinations, a rotating arm actuated by said interrupted current, a contact closed by said rotating arm on the occurrence of interruptions of said interrupted current representative or said long spaces between said combinations, and means actuated by the closing of said contact to cause said reproducing means to reproduce the symbol selected by said selecting means.

EDWARD N. DINGLEY, JR.

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