US3414674A - Function suppressing mechanism for printing telegraph reperforators - Google Patents

Description

R. E. ARKO 3,414,674 FUNCTION SUPPRESSING MECHANISM FOR PRINTING Dec. 3, 1968 TELEGRAPH REPERFORATORS 2 Sheets-Sheet 1 Filed March 15, 1965 INVENTOR ROBERT E ARKO ATTORNEY Dec. 3, 1968 R. E. ARKO 3,414,674

FUNCTION SUPPRESSING MECHANISM FOR PRINTING TELEGRAPH REPERFORATORS 2 Sheets-Sheet 2 Filed March 15, 1965 United States Patent FUNCTION SUPPRESSING MECHANISM FOR PRINTING TELEGRAPH REPERFORATORS Robert E. Arko, Mount Prospect, Ill., assignor to Teletype Corporation, Skokie, 111., a corporation of Delaware Filed Mar. 15, 1965, Ser. No. 439,712 Claims. (Cl. 17892) ABSTRACT OF THE DISCLOSURE In a typing reperforator of the type including a selector clutch for rotating a plurality of selector earns, a function clutch for operating the perforator driving and tape feed mechanisms of the reperforator and a cam rotated in response to tripping of the selector clutch for actuating a lever to trip the function clutch, a device for selectively preventing operation of the perforator driving and tape feed mechanisms of the reperforator comprising an electromagnet that is actuated upon receipt by the reperforator of predetermined signals and means responsive to actuation of the electromagnet for preventing the lever from tripping the function clutch upon actuation by the cam.

This invention relates to signal controlled tape perforators and more particularly to function suppressing mechanism for perforators preparing tape, a monitor copy of which is being made.

In the preparation of control tapes for use in computers, it is frequently desirable to provide a monitor copy of the information being encoded in the tape. Such copy, preferably, is printed on a page printer under control of the keyboard or other control source that is feeding the information to the perforator. In order to provide a page type monitor copy, the keyboard must transmit code combinations representative of certain functions such as line feed and carriage return operations to the monitor printer. However, a computer which is to utilize this tape as an input to it should not receive the signals representative of code combinations for such functional operations. Consequently, there has been a need for a signal controlled perforator which will respond to code combination signals such as those used in printing telegraphy and will prepare a tape but will not be perforated with code combinations representing certain of the functions which of necessity must be transmitted to a printer making a monitor copy of the information being perforated in the tape.

The primary object of the invention is the preparation of control tapes for use as input controls for computers.

Another object of the invention is to provide a reperforator with mechanism for suppressing its operation upon the receipt by it of certain predetermined code combination signals.

Still another object of the invention is to provide a reperforator with signal responsive means for suppressing its functions.

In accordance with the preferred embodiment of the invention, printing telegraph reperforators as disclosed and claimed in the patent to R. E. Arko-C. W. Swan No. 2,951,902, issued Sept. 6, 1960, has been modified to provide an apparatus which will satisfy the objectives set forth hereinbefore. In the apparatus disclosed in the aforementioned patent the perforation of the control tape is effected under control of a selector mechanism which controls the selection of perforating pins for operation. This selector mechanism preferably is of the type shown and claimed in the patent to W. Z. Zenner No. 2,595,745, issued May 6, 1952, and responds to code combinations of signals in its selection of the perforating pins. The signals to which this perforator responds may also be applied to a page printer such as the page printer shown and claimed in the patent to W. J. Zenner No. 2,505,729, issued Apr. 25, 1950. The signals applied to the perforator and to the page printer may be originated at any suitable keyboard mechanism and transmitted through a distributor to the perforator and page printer. Any suitable arrangement may be provided in the transmitter or keyboard mechanism for closing a circuit upon the operation of certain keys in the keyboard and when a key for a function such as line feed or carriage return is operated in the control keyboard the circuit is completed to an electromagnet in the reperforator which upon operation will block the tripping of the clutch mechanism in the perforator that controls the functional operations of the reperforator. Upon the tripping of the electromagnet in the reperforator the function clutch of the reperforator will not be tripped although the signal representative of that function is received in the selector mechanism of the reperforator and the reperforator is set up to punch the code combination in the tape representative of that function.

A more complete understanding of the invention may be had by reference to the following detailed description when considered in conjunction with the accompanying drawings wherein:

FIG. 1 is a side elevational view of a reperforator constructed in accordance with the present invention, parts being broken away more clearly to illustrate the physical elements of the apparatus involved in the invention;

FIG. 2 is a fragmentary perspective view of the function mechanism of the reperforator with those parts not necessary to an understanding of the present invention eliminated; and

FIG. 3 is a side elevational view on an enlarged scale showing the mechanism actuated by the suppress electromagnet to render the function clutch of the apparatus inoperative.

The present invention in its preferred embodiment utilizes the basic structure of the aforementioned Arko et al. patent and reference may be had to that patent and to the Zenner patent covering the selector mechanism for details of operation and structural features of the reperforator to which the present invention has been adapted. By reference to the drawings it will be seen that like reference numerals have been applied to the same parts throughout the several views. As illustrated in the drawings a frame 9 is provided on which all of the operating parts of the apparatus are suitably supported. A main power shaft 12 is suitably journalled in this frame and is driven continuously by a motor (not shown).

The selector mechanism 11 receives its motive power from the main power shaft 12. There are two similar clutch mechanisms 10 and 13 associated with the main power shaft 12 and one of these clutches, that is clutch 10 in FIG. 2, is operable to connect the selector mechanism 11 to the main power shaft 12. The other clutch 13, which may be termed either the main power clutch or the function clutch, serves to supply power for operating a toggle mechanism 14 (FIG. 1) of the perforator following the selection of function selector slides 15 under control of the selector mechanism 11. Both of these clutches are of the type shown and claimed in the patent to A. N. Nilson et al. No. 2,568,249, issued Sept. 18,

Mounted on the front end of the main power shaft 12 (FIG. 2) is the clutch 10 that serves to transmit power from the shaft 12 to a selector cam 16 on which a plurality of cams are mounted. This clutch 10 is rendered effective to connect the selector cam sleeve 16 to the shaft 12 when a stop projection 17 of a clutch shoe lever, such as that disclosed in the Nilson et a1. patent, is released by an end portion 18 of a stop bail 19. The selector mechanism 11 includes a selector magnet 21 (FIG. 1), which upon receipt of a marking or current impulse will attract an armature 22, and upon receipt of a spacing or no current impulse will release the armature 22.

As is common in telegraph transmission, at the start of a signal for any character or any function, the start interval, which is of spacing or no current nature, releases the selector armature 22. The armature 22 then moves away from the selector magnet 21 to unlatch a start lever 23, thereby to permit the lever 23 to move clockwise, which motion is imparted to the stop bail 19 in the manner described in said Patent No. 2,951,902. This will effect the release or tripping of the clutch which will thereby impart rotation to the selector cam sleeve 16.

The selector cam sleeve 16 has on it a series of selector cams such as the cam 24 (FIG. 1), and also has on it a function clutch trip cam 32. The selector cams 24 and function clutch cam are substantially the same as the cams described in detail in said Patent No. 2,951,902. The selector cams have individually associated with them a series of cam levers 33 which are spring urged to engage cam follower portions 34, formed on them, with the peripheries of their respective cams such as the cam 24. These selector cam levers 33 are pivotally mounted on a pivot shaft 35 suitably supported in the frame 9. Any one of the selector cam levers 33 which is permitted to rock clockwise about the pivot shaft 35, due to a marking condition prevailing at the proper time interval when the indentation in its respective cam 24 is aligned with a cam follower projection 34, will permit a push lever 36 that is slidably and pivotally mounted on a stationary shaft 37 to rock clockwise under the influence of its in dividual actuator spring 38. This will cause the free extremity of the push lever 36 to drop down onto the lower push-lever-engaging-shoulder 39 of the selector lever 33. When a push lever 36 is on the lower shoulder 39 of its associated selector lever 33, the push lever will be moved to the left with respect to its pivot shaft 37 as the selector lever 33 is rocked counterclockwise due to its cam follower projection 34 riding up onto the high part of its respective selector cam 24.

When a push lever 36 is moved to the left it will en gage a selector slide latch 41 individual to it and will rock that latch 41 about a pivot shaft 42 against the action of a contractile spring 43.

There is one selector slide latch 41 provided for each of the push levers 36. Consequently when a push lever 36 is selected and actuated by its associated selector lever 33, a selector slide latch 41 will be rocked counterclockwise about its pivot 42. The springs 43 normally hold their respective selector slide latches 41 in latching relation with the punch selector slides 15 provided in the apparatus. One selector slide 15 is associated with each of the selector slide latches 41 and correspondingly, one selector slide latch 41 is individually associated with each one of the selector levers 33.

The selector mechanism 11 serves to select for operation, various mechanism in the apparatus including punches 44 in a punch mechanism 45 which, as mentioned hereinbefore, is basically the same as the punch mechanism disclosed in the aforementioned patent to R E. Arko et al. The punch mechanism 45 includes an actuator bail 47 which comprises a cross bar 48 that is rectangular in cross section and is fixed to a pair of arms 49 pivoted on a shaft 51. The punch actuator bail 47 is oscillatable about the shaft 51 by means of the toggle mechanism 14 which comprises a pair of hell cranks 52 fixed to a rockable shaft 53, and a second pair of hell cranks 54 pivoted on the bell cranks 52 and also pivotally attached to the cross bar 48 of the punch actuator bail 47.

Each of the arms 49 of the punch actuator bail 47 is provided with a projection 55 in which there is formed a slot 56 for receiving a cross bar 57 carried in the bail 47. The cross bar 57 serves as an anchor for a plurality of contractile springs 58 and one contractile spring 58 is provided for each of the punch selector slides 15 which are slidable on and pivoted for oscillation about the shaft 51 and which are urged by their respective springs 58 to move to the left (FIG. 1), Each of the selector slides 15 has a latching portion 59 formed on it which cooperates with a latching shoulder 61 formed on its associated selector slide latch 41 so that when the selector slide latch 41 is in the position shown in FIG. 1 the latching portion 59 of the punch selector slide 15 will be positioned to engage with the latching portion 61 to prevent an unselected selector slide from moving to the left sufiiciently to align its head portion 63 with its associated punch 44. However, when the selector slide latch 41 is rocked counterclockwise about the pivot shaft 42 by its associated push lever 36, as will presently appear, the latching shoulder 61 will be moved out of the path of the latching portion 59 and the spring 58 will be permitted to move the punch selector slide 15 to the left (when permitted to do so by member as will be described hereinafter). When a spring 58 moves its punch selector slide 15 to the left, a shoulder 62 on the slide 15 will extend over the top of the cross bar 48.

When the punch actuator bail 47 is moved upwardly due to the rocking of the bell crank lever 52, by its shaft 53 rocking in a counterclockwise direction (FIG. 1), any of the punch selector slides 15 which have been selected and released by their associated selector slide latches 41 will be moved upwardly. In moving to the left from the position shown in FIG. 1, a punch selector slide 15 will carry the head portion 63 on it into position beneath its associated punch 44 which is slidably mounted in a punch block 71.

The initiation of the movement of the selector slides 15 from the position shown in FIG. 1 to position to select punches 44 for operation is controlled by the function clutch trip cam 32. This function clutch trip cam 32 has associated with it a function clutch cam lever assemblage 64 which is actuated by the function clutch trip cam 32. The lever assemblage 64 is made up of a bell crank lever 65, a latching lever 66 and an operating lever 67. The bell crank lever 65 and the operating lever 67 are both mounted for oscillation about a stud shaft 68 whereas the latching lever 66 is pivoted on the horizontal arm of the bell crank lever 65. The bell crank lever 65 1s resiliently urged to rock in a counterclockwise direction about the stud shaft 68 by a contractile spring 69 thereby to hold a cam follower portion 70 of the bell crank lever 65 in operative contact with the surface of the function clutch trip cam 32. The right end (FIG. 1) of the operating lever 67 extends under a latching shoulder on the latching lever 66 and the latching lever 66 is urged by a contractile spring 81 to assume the position shown in FIG. 1 where the shoulder 80 is in latching relation to the operating lever 67. When the shoulder 80 is positioned in latching relation to the extreme right end of the operating lever 67 and the function clutch trip cam 32 moves its high portion into engagement with the cam follower portion 70 of lever 65, lever 65 will be rocked clockwise about the shaft 68 against the action of its spring 69 and consequently Will pull the latch lever 66 downwardly to cause the operating lever 67 to rock clockwise about the shaft 68. The operating lever 67 has a lateral extension 82 formed on it which is aligned with an arm 83 of a four armed lever 84 that is mounted for oscillation on the pivot shaft 42. A second arm 85 of the four-armed lever 84 has a contractile spring 86 attached to it for urging the lever 84 to rock in a clockwise direction about the pivot shaft 42.

A third arm 87 of the lever 84 terminates in a bifurcation, between the prongs or tines 88 of which rides a lip 89 of the bail member 75 carried pivotally on the bell crank 54. During the selection period, the slides 15 are held in their rightward position (FIG. 1) by the engagement of the lip 89 with shoulders 90 formed on said slides. At the end of the last impulse interval of a signal received in the selector mechanism, the function clutch trip cam 32 will rotate the lever assemblage 64 clockwise to impart counterclockwise rotation to the four-armed lever 84. The third arm 87 of said lever 84 will, through the prongs or tines 88, rotate the bail member 75 clockwise to withdraw the lip 89 thereof from the shoulders 90 to permit those slides 15 which have been unlatched by the selector slide latches 41 to be driven leftwardly by their individual springs 58 to position their head portions 63 beneath the punches 44 that are to be operated. In timed relation with this operation, the toggle mechanism 14 will be operated to raise the bar 48 (and engaged punch selector slides 15) and to move the bell crank 54 leftward, thus also moving the bail member 75 leftwardly. The prongs or tines 88 are of sufiicient length to permit this leftward movement of the lip 89 without disengaging the third arm 87 from the lip 89. Before the toggle mechanism 14 is returned to the position shown in FIG. 1, the lever 84 will have been returned to its position as shown in FIG. 1 and consequently, will have rotated the bail member 75 counterclockwise to raise the lip 89 thereof again into the path of the shoulders 90, so that upon completion of the return movement (rightwardly) of the toggle mechanism 14 including the bail member 75 the selector slides 15 will be engaged by the lip 89 and returned to their rightward position as shown in FIG. 1 where they will be in position to be caught by the selector slide latches 41.

The operation of the toggle mechanism 14 is controlled by the function clutch mechanism 13 in the following manner: As the function clutch trip cam 32 rotated to position to actuate the lever assemblage 64 and thereby impart counterclockwise rotation to the fourarmed lever 84, a fourth arm 91 of the lever 84 will rock counterclockwise to effect its disengagement from a clutch release lever 92 fixed on a rock shaft 93. Also fixed to the rock shaft 93 is a function clutch latch lever 94 terminating in a laterally directed portion 95 which is normally in blocking relation with a clutch shoe lever 96. Rock shaft 93 carrying the clutch release lever 92 and function clutch latch lever 94 thereon is normally biased in a counterclockwise direction by a spring 97 attached to an arm 98 on lever 92. Thus, when the arm 91 of the lever 84 is rotated out of blocking relation with the arm 92, the shaft 93 is permitted to rock counterclockwise to impart similar motion to latch lever 94 thereby withdrawing the portion 95 of latch lever 94 out of the path of the clutch shoe lever 96. This will trip the clutch 13 and permit it to engage and drive a function cam sleeve 99 (FIG. 2) through a complete cycle of rotation.

Also fixed to the rock shaft 93 is a restoring lever 106 (FIG. 2) which cooperates with a stud 107 on a cam disc 108 fixed to the cam sleeve 99 and which will rock the shaft 93 in a clockwise direction to rock the lever arm 92 clockwise sufficiently to permit the lever arm 91 to be rocked beneath the end of the arm 92. This will cause the function clutch latch lever 94 to be rocked in a clockwise direction to bring the portion 95 thereof into blocking relation with the clutch shoe lever 96 and thus restore the clutch tripping mechanism to its normal nonoperated condition with arm 91 of lever 84 again in blocking relation with arm 92 as shown in FIG. 1. Therefore, as the clutch 13 is tripped in the just described manner, the cam 108 together with a cooperating cam disc 109 on the function cam sleeve 99 will cooperate with a main power or rocker bail 110 which will in turn, through a link 111 which is connected to the bail 110 by a post 112, rock the shaft 53 thereby to operate the toggle mechanism 14 (FIG. 1) back and forth through a complete cycle of oscillation.

The shaft 53 in addition to effecting the operations described hereinbefore, will, in oscillating its bell crank levers 52, effect the feeding of a short length of tape to the punch block 71. This operation is effected by a toothed feed wheel113, the teeth of which are engaged in feed hole perforations in the tape (not shown). The tape is fed through a tape guide 114 into engagement with the feed wheel 113 that is mounted on a drive shaft 115. The drive shaft 115 ha fixed to it a ratchet wheel 116 which is driven by a driving pawl 117. The pawl 117 is pivotally mounted on one of the bell crank levers 52 and is urged into engagement with the ratchet wheel 116 by a contractile spring 118. Thus, upon each tripping of the function clutch 13 the pawl 117 will first be moved to position to engage with successive teeth on the ratchet wheel 116 and then on the return movement of the bell crank 52 will advance the tape one increment of movement.

Thus far in the description the ordinary operation of the apparatus has been described when the selector mechanism 11 is receiving code combination signals representative of characters to be represented in the tape. When a perforator is to be used in the preparation of tape for use in computers the functional operations such as carriage return and line feed code combinations of perforations should not be formed in the tape nor should the tape be advanced. This is true although such functional signals are necessary for the operation of a page printer mechanism which is to print a monitor copy of the information to be perforated in the tape for use by the computer.

When function signals are received in the selector mechanism 11 the selector magnet 21 will respond to these signals and consequently by selectively actuating its armature 22 will cause the selector cam levers 33 to rock clockwise into the lower portion of their respective selector cams 24. As the receiving cycle of the perforator continues, those selector levers 33 that have been selected for operation will actuate through respective push levers 36 and trip through respective selector slide latches 41 to release the punch selector slides 15 for movement to the left.

In order to prevent the perforation of code combinations in the tape representing these functions, the tripping of the function clutch 13 is prevented. This suppression of punching of the functions is effected by rocking the latching lever 66 about its pivotal connection with the operating lever 67 thereby to move the latching shoulder 80 out of the position shown in FIGS. 1 and 2 and into the position shown in FIG. 3. This result is accomplished by energizing an electromagnet 123 suitably mounted on the frame 9 of the perforator. The electromagnet 123 upon being energized will attract its armature 124 to the right (FIGS. 1 and 3). The armature 124 is fixed to an armature lever 125 that is pivoted at 126 and is urged to rotate clockwise by a contractile spring 127. The lower end of the armature lever 125 normally comes to rest on a shoulder 128 (FIG. 3) of a latch lever 129 with the left face of the armature lever 125 bearing against a surface 130 formed on the latch lever 129. The latch lever 129 is urged to rotate in a clockwise direction about a pivot stud 131 by a contractile spring 132 and in tending to move in a clockwise direction will move a second shoulder 133 on it against the end of the armature lever 125 as soon as the electromagnet 123 is energized. Energization of the electromagnet 123 will cause the armature lever 125 to engage the latching lever 66 and rock it clockwise with respect to the horizontal arm of the bell crank lever 65. When this occurs the latching shoulder 80 on lever 66 will be moved out of position to be engaged by the end of the operating lever 63.

As a consequence of the operation just described a signal received in the apparatus representing one of the function operations will cause the selector mechanism 11 to go through a complete cycle but when the function clutch trip cam 32 rocks the bell crank lever 65, the bell crank lever 65 will not actuate the operating lever 67 due to the fact that the signal being received in the apparatus will also cause the electromagnet 123 to be energized to break down the leverage mechanism 64 and render it inoperative to trip the function clutch 13.

Any suitable mechanism may be provided for energizing the electromagnet 123 momentarily upon the receipt in the perforator of a function representing code combination signal. A character recognition circuit indicated generally at 135 may comprise such a device which operates under control of the input keyboard transmitting signals to the perforator. When the electromagnet 123 is energized momentarily, to suppress the perforating of a code combination, it will cause the armature lever 125 to move clockwise off of the shoulder 128 thereby to rock the latching lever 66 clockwise about its pivot. This will cause the shoulder 80 to be moved out of the path of the right end of the operating lever 67. The armature lever 125 in moving off of the shoulder 128 on latch lever 129 will permit the spring 132 to rock the latch lever 129 clockwise so that the lower end of the armature lever 125 will catch on the second shoulder 133 where it will be u held until the end of the shoulder 80 is moved past the extreme right end of the operating lever 67. The armature lever 125 will thereby be latched in its attracted position even though the electromagnet 123 is deenergized and the armature lever 125 will remain latched until the function trip cam 32 has rocked the bell crank lever 65 through an appreciable distance whereupon a pin 136 on the latch lever 66 will engage the upper surface of the latch 129 to rock the latch 129 counterclockwise against the action of its spring 132. This will occur after the edge of the shoulder 80 has passed the right end of the operating lever 67 and will restore the apparatus to the condition shown in FIG. 1. Obviously the just described operation will take place on each cycle of the function clutch trip cam 32 but will have no effect on the operation of the function mechanisms unless the electromagnet 123 had been momentarily energized.

Although a particular embodiment'of the invention is shown in the drawings and described in the foregoing specification it will be understood that the invention is not limited to that specific embodiment but is capable of modification and rearrangement, and substitution of parts and elements without departing from the scope of the invention.

What is claimed is:

1. In a signal controlled tape perforator;

a selector mechanism responsive to incoming signals;

a plurality of operating instrumentalities;

means selectively actuated by said selector mechanism for setting said operating instrumentalities for operation;

means for operating the said instrumentalities ineluding:

power means,

means in said selector mechanism for initiating a cycle of operation of said power means in each cycle of the selector mechanism, and

means selectively operable after the selector mechanism has set said instrumentalities for operation and independent of said selector mechanism for disabling the means for initiating a cycle of operation of the power means.

2. In a signal controlled tape perforator;

a selector mechanism responsive to incoming signals;

a plurality of operating instrumentalities;

means selectively actuated by said selector mechanism for setting said operating instrumentalities for operation;

means for operating the said instrumentalities including:

power means,

cam means in said selector mechanism moved through a cycle of operation in each cycle of the selector mechanism,

an oscillatable lever moved through a cycle of oscillation by said cam means on each cycle of operation of said cam means,

an operating lever operative to initiate a cycle of operation of said power means to operate said instrumentalities,

a latching lever normally connecting the oscillatable lever to the operating lever, and

means operative to move said latching lever from its normal position to disconnect the operating lever from the oscillatable lever thereby to suppress operation of said power means.

3. The device according to claim 2 further including means actuated by the oscillatable lever for restoring the latching lever to its normal position.

4. The device according to claim 2 further including means for holding the latching lever out of its normal position for a predetermined interval andmeans on the latching lever for disabling the holding means after said interval.

5. In combination in a tape perforator,

signal responsive means;

a plurality of punches;

latch means controlled by the signal responsive means;

punch selector slides conditioned for operation by said latch means;

tape feeding means;

means for actuating said feeding means and the conditioned ones of said selector slides;

function clutch means for controlling said actuating means;

initiating means in said signal responsive means for initiating operation of said function clutch means; and

means for disabling said initiating means to suppress operation of said actuating means.

6. In combination in a tape perforator,

signal responsive means;

a plurality of punches;

latch means controlled by the signal responsive means;

punch selector slides conditioned for operation by said latch means;

tape feeding means;

means for actuating said feeding means and the conditioned ones of said selector slides;

function clutch means for controlling said actuating means;

initiating means in said signal responsive means for initiating operation of said function clutch means including a cam lever invariably actuated upon receipt of asignal in the signal responsive means; means for disabling said initiating means to suppress operation of said actuating means including an operating lever for tripping said function clutch,

a latching lever for latching said operating lever to said cam lever, and

means for disabling said latching lever to suppress operation of said function clutch.

7. The device according to claim 5 wherein the means for disabling the initiating means is a latch for normally maintaining the initiating means effective and for actuation to disable the initiating means thereby suppressing operation of the actuating means.

8. The device according to claim 5 wherein the initiating means and the disabling means are:

a function trip cam in said signal responsive means;

and

a function clutch cam lever assemblage for actuation by said function trip cam including:

a bell crank lever and an operating lever mounted on a common pivot, said bell crank lever having a cam follower portion in engagement with said cam and said operating lever normally blocking operation of the function clutch means,

a latching lever pivoted on said bell crank and 9 biased to latch the operating lever to the bell crank lever for actuation thereby, and electromagnetically actuated means for rocking said latching lever out of latching engagement with said operating lever to prevent tripping of said function clutch means.

9. A device for receiving code combinations and for recording the code combinations on a record medium including:

a plurality of recording members;

signal responsive means for selecting predetermined ones of the plurality of recording members in response to received code combinations;

recording means for causing the selected ones of the plurality of recording members to make a recording corresponding to the received code combination on the record medium;

interconnecting means driven by the signal responsive means for causing the recording means to operate; and

means for disabling the interconnecting means thereby preventing the recording of the received code combination.

10. The device according to claim 9 wherein the recording means includes means for advancing the recording medium to provide spacing for the recording so that the disabling means also prevents spacing of the record medium.

References Cited UNITED STATES PATENTS 1,936,956 11/1933 Rothermel 178----92 2,352,060 6/1944 Wusteney et al. 17892 3,301,954 1/1967 Krakusky 178-92 THOMAS A. ROBINSON, Primary Examiner.

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