US2648385A - Floatingly mounted perforating apparatus - Google Patents

Description

Aug. 11, 1953 I J. L. DE BOO 2,648,335

FLOATINGLY MOUNTED PERFORATING APPARATUS Original Filed March 18, 1948 i 4 Sheets-Sheet l n JEROME L. 05500 D TTORNEY Aug. 11, 1953 J. DE BOO 2,648,385

FLOATINGLY MOUNTED PERFORATING APPARATUS Aug. 11, 1953 J. DE BOO 2,648,385,

FLOATINGLY MOUNTED PERFORATING APPARATUS Original Filed March 18, 1948 4 Sheets-Sheet 5 FIG. I3

FIIIG. a

FIG. l4

Fllzs. INVENTOR JEROME L 06500 ATTORNEY Patented Aug. 11, 1953 FLOATINGLY MOUNTED PERFORATING APPARATUS Jerome L. De Boo, Chicago, Ill., assignor to Teletype Corporation, Chicago, 111., a corporation of Delaware Original application March .18, 1948, .Serial No. 15,592, now Patent No. 2,545,198, datedMarch 13, 1951. Divided and this application January 4, 1949, Serial No. 69,229

11 Claims. 1

This invention pertains to perforating apparatus and more particularly to high speed telegraph tape reperforators.

This application is a division of copending application Serial No. 15,592, filed March 18, 1948 now Patent No. 2,545,198.

The principal object of this invention is to provide a perforating apparatus wherein the material being perforated may be advanced during the punching cycle.

For some time it has been sought to obtain a simplified telegraph tape reperforator in an effort to reduce the manufacturing costs. The reperforators in common use at the present time include a punch and die unit which requires very close tolerances in its manufacture, and consequently manufacturing costs are high. It is, therefore, another object of this invention to provide a reperforator wherein greater tolerances are allowable in the punch and die unit, thus re ducing the cost of manufacture.

By this invention a high speed selector mechanism controls the selection of a plurality of punches in accordance with signals received by the selector mechanism. In the preferred embodiment of the invention the punches are floatingly mounted in slots in a stationary punch block. When the punches are selected in accordance with the signals received by the selector mechanism, the selected punches are caused to perforate a telegraph tape. Thereafter the tape is advanced simultaneously as the punches are withdrawn from the tape, :which. causes the punches to be moved pivotally until they are withdrawn from the tape.

Therefore, another object of the invention is to combine a high speed tape perforating mecha nism with a high speed selector mechanism.

Still another object of the invention is to provide a reperforator having pivoted floating punches whereby the punches may move with the advancing tape.

In a modified form of the invention the punch block is mounted pivotally in order that it can be moved as the punches are advanced towards the tape during the perforating operation. By this form of the invention, the tape is advanced during the perforating movement of the punches, as well as while the punches are being withdrawn from the tape. Thus it is possible to increase the speed of the perforating operation since it is unnecessary that there be separate punching and tape feeding operations.

Therefore, a further object of the invention is to provide -a reperforator wherein both the 2 punches and the die are pivoted in order that they may move with the advancing tape.

'A still further object of the invention is to provide a manually operated backspace mechanism in a reperforator having a pivoted punch and die unit.

Other objects and advantages not specifically recited above will be apparent and the invention will be better understood by reference to the following detailed description when considered 'in conjunction with the accompanying drawings, wherein:

Fig. l is a fragmentary isometric view showing the principal features of the preferred embodiment of the invention;

Fig. 2 is a front elevational view of the reperforator with the front portion of the supporting frame removed for a better view of the 'features of the invention;

Fig. 3 is a detail fragmentary isometric view of the selector magnet and armature and the armature locking mechanism;

Fig. 4 is a detaillisometric view of the punches;

Fig. 5 is a transverse view of a section of tape perforated by punches of the type shown in Fig. 4;

Fig. 6 is a front elevational view of a modified form of the invention showing permissively actuated punch interponents and a pivoted punch block;

Fig. 7 is a fragmentary isometric view of the tape feed and backspace mechanism used in the modified form of the invention shown in Fig. 6;

Fig. 8 is a side elevational view of the pivoted punch block and backspace mechanism shown in Fig. 7;

Fig. 9 is a timing diagram of the various operations of the preferred embodiment of the invention;

Fig. 10 is a view of several differently shaped punches suitable for use with the invention; and

Figs. 11, 12, 13, and 14 show various types of punch and die wheels for rolling in the feed holes in a telegraph tape.

This invention incorporates a high speed selector mechanism of the type disclosed in the patent to W. J. Zenner, No. 2,339,313, issued January 18, 1944. In the invention herein described a series of selector levers move to a permutation of marking and spacing positions depending upon the signals received by a selector magnet. When any of the selector levers move'into marking position, cooperating selector interponents also move into marking position. Subsequent rotation of the selector cams causes both the selector levers and selector interponents to be moved. to positions to set a corresponding group of punch interponents. Thereafter the selector levers and selector interponents return to normal position, thus providing for overlap. A punch bail engages and moves the punch interponents whereby those punch interponents which are in marking position engage and in turn actuate corresponding punches to perforate a telegraph tape. The punches are held in position fioatingly and pivotally by tension springs. As the punches are being withdrawn from the tape, the tape is advanced, and due to the freedom of the punches to pivot, they are carried along with the tape until withdrawn therefrom, and immediately upon such withdrawal they are snapped back to normal position by their tension springs.

Many features included in the disclosure of the present application are also disclosed and are claimed in the copending application of W. J. Zenner, Serial No. 15,653, filed March 18, 1948, now Patent No. 2,490,608.

Referring to the drawings the punching unit is supported in a pair of side plates of the main frame, shown only fragmentarily in Figs. 1 and 4. The selector cams indicated generally by numeral l2 and the various other operating cams are mounted to sleeves which are rotatable about a shaft l3 which is journalled frictionlessly in a pair of brackets |4 suitably secured to a base (not shown) The shaft I3 is rotated continuously in a clockwise direction by means of a gear I6 which is driven continuously by a suitable source of power (not shown).

A selector cam sleeve H is mounted rotatably about the shaft l3 and is integral with a driven member (not shown) of a single revolution selector clutch, the driving drum of which is represented by numeral [8. This clutch whose driving member I8 is secured to the continuously rotating shaft I3 is preferably of the type disclosed in the copending application of A. N. Nilson et al., Serial No. 707,176, filed in the United States Patent Oflice on November 1, 1946, now Patent No. 2,568,249.

The selector cam sleeve carries the usual series of five selector cams 2|, 22, 23, 24 and 25. For the sake of clarity in the drawings only the fifth selector cam 25 is shown in Fig. 1; however, the contour of all of these cams is clear from the timing diagram shown in Fig. 9.

A selector magnet 21 is mounted suitably on the main frame of the reperforator and a selector armature 28 cooperates with the magnet 21. The armature 28 is biased by a spring 29 whereby the left end thereof, Figs. 2 and 3, is held in its lower or spacing position when the magnet 21 is de-energized. Energization of the magnet 21 causes it to pull up the armature 28 to marking position.

A lever 3| is mounted pivotally on a shaft 32 and is urged continuously in a clockwise direction by a spring 33. The lever 3| has a shoulder 34 thereon which is adapted to engage and be blocked by the armature 28 when it is in marking position, but when the armature 28 is in spacing position the lever 3| may be pivoted clockwise by its bias spring 33. A selector clutch trip off lever 36 is mounted pivotally on a shaft 31 suitably secured to the main frame, and carries a pair of pins 38 and 39 which cooperate with the lever 3| in a manner whereby pivotal movement of the lever 3| pivots the selector clutch trip off lever 36. The trip ofi" lever 36 has a foot 4| which cooperates with a clutch lever (not shown) on the driven member of the Selector clutch. When the trip off lever 36 is pivoted clockwise the foot 4| releases the clutch lever allowing the driven member and selector cam sleeve I! to be rotated. A selector clutch trip off cam 42 on the selector cam sleeve cooperates with a lug 43 on the trip off lever 36, the low portion 44 of the cam 42 presenting itself opposite the lug 43 upon the completion of each revolution of the selector cam sleeve IT. The cam 42 holds the lever 3| out of engagement with the armature 28 except during the stop and start impulses. The stop impulse of each telegraph signal being a marking impulse, it is apparent that the foot 4| will engage the clutch lever at the end of each signal to stop rotation of the transmitting cam sleeve. The start impulse of each telegraph signal being a spacing impulse, it is also apparent that the transmitting cam sleeve will be released for rotation upon the receipt of each start impulse.

A pair of armature locking levers 4'3 and 41 are mounted pivotally on a shaft 43 and each is biased clockwise by an individual spring 53. Both of the locking levers have a lug 52 which cooperates with an individual locking cam 49. The locking lever 4'6 has a stepped shoulder 54 theeron for locking the armature 28 in spacing position and the locking lever 4'1 has a stepped shoulder 55 for locking the armature 23 in marking position. As is apparent from Fig. 9 the cam 49 has a contoured surface which allows the armature 28 to be held in whichever position it assumes in response to the signal impulses received by the magnet.

The five selector cams 2| through 25 cooperate with a series of five selector levers BI, 62, 63, S4, and 55. Each of the selector levers 6| through 65 is mounted pivotally on a shaft 51 suitably secured to the frame and is yieldable thereon due to the action of individual bars 45, slidable in apertures 55 in a plate 66 secured suitably to the frame, and individual leaf springs 18 which continuously urge the selector levers towards the shaft 61' (Fig. 2). Each of the selector levers is biased in a clockwise direction by an individual tension spring 68. Each of the selector levers has a lug 69 which follows the corresponding selector cam. When the armature 28 moves to marking position in response to one of the signal impulses the locking lever 4! momentarily locks the armature 28 in such marking position during which time the selector lever opposite the low part of the corresponding selector cam moves beneath the armature 28. When the armature 28' is moved to spacing position in response to a signal. impulse the locking lever 46 momentarily locks the armature 28 in spacing position. When the armature is thus moved and held in spacing position the selector lever opposite the low part of the corresponding selector cam is blocked by the armature 28 and the lug E9 is prevented from dropping into the low part of such cam.

A series of selector interponents '1 i, only one of which is shown, have slots 12 therein and are slidable longitudinally. A comb bar T3 secured suitably to the main frame has slots in the transverse edges thereof which position transversely the selector interponents The comb bar 13 fits loosely within the slots i2 of each selector interponent H allowing each selector interponent H a slight degree of pivotal movement. A shaft 14 suitably secured to the main frame limits the clockwise pivotal movement of the selector interponents H and a series of springs 15 secured suitably to the main frame continuously urges punch bail I I.

theselector interponents II ina clockwiserdirection.

Each selectorinterponent II cooperates with a corresponding one of the selector levers BI through 65 whereby afoot TI on veach selector interponent 'II remains on top of thecorresponding selector lever whenever a spacing impulse 'con trols such selector lever and drops behind the selector lever when a marking impulse controls it. Referring to the selector cam 25, selector lever 65 and theselector interponent II in the fifth position, when the foot 11 drops behind the selector lever 65 in the manner described,.subsequent rotation of the cam sleeve I'I brings an extra high portion I8 :of the selector earn 125 against the lug 69 which pivotstheselector lever 65 counterclockwise thereby moving the selector 'interponent II tothe left to setxa corresponding punch interponent 85 of a series of punch interponents BI, 82, B3, 84'and85.

A latch bail 87 secured pivotally to the main frame at points 88 and biased in a clockwise direction by a spring 89.is adapted to latch a tooth 99 on any of the punch interponents BI through 85 moved by the selector interponents II in the above-described manner. A bell crank lever III secured pivotally to the main frame by a bolt 92 has a cam follower 93 which follows a punch interponent release cam 94. The follower 93 is continuously urged against the cam '94 due to the action of a tension spring 96 suitably secured to the main frame. An upturned end portion 9'! of the bell crank lever 9| cooperates with a lug 98 on the latch ball 31 to disengage the latch bail 8'! from the punch interponents -8I through 35 when the high part of the cam 94 is opposite th follower 93.

When all of the punch interponents BI through 85 have been set due to the action of the extra high portions on the selector cams 2| through 25, a bail 56 is actuated to disengage theselector interponents II from the selector levers 6| through 65. The bail 56 consists of an L-shaped member pivoted to the main frame by a bolt 51 and is continuously urged in a counterclockwise direction by a spring 58. The ball 56 has a cam follower 59 thereon adapted to ride a cam 60. As the cam 60 rotates, the high portion thereof, upon engagement with the cam follower 59, pivots-the bail 56 against the action of the spring 58 to erase any selection existing in the set of selector interponents II by moving them all to spacing position preparatory to the next selection to be set up therein.

Each of the punch interponents B-I through 85 is supported in a punch bail I III A pair of comb bars I92 and -I I33, integralparts of the punch bail ItI position transversely the punch interponents and allow them to slide longitudinally in the A set of tension springslllesecured suitably to the punch bail IIlI urge the punch interponents 8I through 85 to the right or spacing position. The punch bail IOI .is supported pivotally in the side plates I I by a pair of pivot bolts IM and is actuated pivotally about bolts IM by a toggle mechanism indicated generally by reference vnumeral I01.

A punch clutch actuating cam I08 mounted on the selector cam sleeve II-controls a single revolution punch clutch I09. The clutch I09 is preferably of the same type as the selector-clutch, the driving drum of which is indicated by numeral I8. The clutch I89 has a driving drum I II which is secured to the continuously -.rotating shaft I3 and-cooperates with a driven member -I I2 secured to 'a sleeve H3 freely rotatable on .the shaft I3. A punch clutch trip off lever IE4, secured to a shaft IIB mounted pivotally in the side plates II, cooperates with a clutch lever III to trip off the punch clutch I09. A cam follower lever I I8 secured to the shaft I I6 is continuously urged in a counterclockwise direction by a spring I I9 whereby a follower I2I is held in engagement with the punch clutch actuating cam I88. When the high portion of the cam Hi8 resents itself to the follower I2I the shaft IIG is rotated clockwise sufficiently to pivot the trip off lever II' I from engagement with the clutch lever III thereby releasing the clutch I69 for rotation. It

is, therefore, clear that the punch clutch I09 is only tripped off when the selector clutch has been tripped off previously.

A punch eccentric I22 is secured to the sleeve .II3 and as the punch eccentric I22 rotates it substantially .reciprocates a lever I23. The lever I23 is secured pivotally by a bolt I24 to one arm of a U-shaped lever I26 and is adapted to oscillate pivotally the U-shaped lever I26 about a bolt I21 secured rigidly to the reperforator frame. The other arm of the U-shaped lever I26 is connected pivotally to a link I28 by a bolt I29 whereby reciprocation of the lever I23 is transferred to the link I23. The link I28 is secured toa shaft I 3I which actuates the toggle mechanism IIJ'I.

Abeam I32 is mounted rotatably between the side plates II on a shaft I33. A U-shapcd lever I34 secured to the beam I32 has a pair of arms I36 and I3! which are secured pivotally to the shaft I3I. Adjacent the arms I35 and IN are a pair of levers I33 and I39 also pivoted to the shaft -I3I. The levers I38 and I39 are secured pivotally at the opposite ends thereof to the punch bail IIJI by a pair of bolts MI. As the link I28 moves to the left straightening the toggle mechanism consisting of the arms I36 and I3! and the levers I38 and I39, the punch bail IfiI is raised and conversely as the'link I28 is moved to the right the toggle mechanism breaks and the punch bail IIII is lowered.

A punch block I4? is supported rigidly between the side plates II and has a series of open faced slots I43 within which a series of punches I'M are reciprocable. A comb bar I46 sup-ported between the side plates II serves to guide the punches I44 and acts as a stop for the punches, engaging a shoulder I4? on each punch IM as the punch is lowered. A die plate M8 is bolted to the punch block I42 and has a series of open faced slots (not shown) within which the punches I44 extend during th upward movement thereof. Each punch I46 is held within its slot M3 by a spring I49 which is secured to a bar I5I suitably mounted between the side plates II. The punches Hi4 are therefore floatingly mount ed in the punch block I42.

A shaft I54 mounted between the side plates supports a rotatable sleeve I55. A tape feed hole punch wheel I55 is secured to the sleeve I55, and a series of feed hole punches I51 formed on the periphery of the wheel I55 mesh with die holes I58 spaced uniformly around the periphcry of a die wheel I59 freely rotatable on a shaft I60. Rotation is imparted to the punch wheel I56 and die wheel I53 by means of a ratchet wheel I M secured to the sleeve I 55; A tape guide wheel I62 having a shoulder I63 around the periphery thereof is also mounted on the sleeve I55. A tape feed guide I64 guides a tape I36 into position where it is engagedby the feed hole punch wheel I56 and the tape guide wheel I62 and as the feed hole punch wheel I56 and the die wheel I59 mesh with the tape I66 therebetween a series of uniformly spaced feed holes are punched in the tape I 66. The correct transverse position of the feed holes in the tape I66 is maintained by the tape guide wheel I62 as the edge of the tape I66 abuts the shoulder I63. The tape is then advanced through a slot (not shown) between the punch block I42 and the die plate I48.

The ratchet wheel I6I is rotated by means of a pawl I61. The pawl I61 is secured pivotally by a bolt I68 to an extended portion I69 of the arm I36 and is biased in a counterclockwise direction by a spring I1I suitably secured to the main frame. A detent lever I12 is secured pivotally to the side plate II by a bolt I13 and is biased in a counterclockwise direction by a spring I14. The detent lever I12 carries a detent roller I16 which engages the ratchet wheel I6I between the teeth on the periphery thereof to prevent backward rotation of the ratchet wheel I6I while the feed pawl I61 is being returned preparatory to making another stroke. As the toggle mechanism I61 is straightened to actuate the punch bail IflI, the extended portion I69 on the arm I36 is pivoted counterclockwise which pulls down the feed pawl I61 causing it to slip over one of the teeth on the ratchet wheel I6I and thereafter as the toggle I61 breaks, the feed pawl I61 is moved up to step the ratchet wheel I6I, after which it is held in stepped position by the detent roller I16.

When the punch bail IIlI is raised extended portions I11 on each of the punch interponents 8| through 85 which have been previously moved to marking position engage shoulders I18 on corresponding punches I44 to raise these punches forcing the cutting edges thereof through the tape I66. Thereafter as the punch bail IUI is lowered the tape I66 is advanced and the punches I44 which were raised to tape piercing position are carried along and pivoted counterclockwise to the dotted position I19 shown in Fig. 2. As the punch bail IUI is lowered the extended portion I11 on each of the selected punch interponents 8| through 85 engages a foot I8I on each punch I 44 to withdraw the punches I44. The perforations thus left in the tape I66 after the punching operations are of the well known chadless type wherein the portions of the tape punched out remain hinged to the tape iving the appearance of trap doors. Fig. shows an example of the tape perforated by the above described reperforator.

A brief description of the operation of the invention follows. The selector magnet 21 is energized and de-energized in accordance with the signals received thereby from a distant transmitter (not shown). The armature 28 is accordingly pulled up when the magnet 21 is energized and allowed to fall due to the urging of the spring 29 when de-energized. Normally when no signals are being received the magnet 21 is energized as the transmitter sending the signals is in its stop position, a marking position. The armature 28, being pulled up, blocks the shoulder 34 to prevent pivotal movement of the selector clutch trip off lever 36 thus preventing rotation of the selector cam sleeve I1. When a start impulse is received, being a spacing impulse, the magnet 21 is de-energized which allows the armature 28 to move to spacing position. At this time, the low portion of the cam 8 44 being opposite the lug 43 and the shoulder 34 being unblocked, the selector clutch trip off lever 36 pivots clockwise to trip oif the selector clutch.

After the start signal is received by the selector magnet 21, five permuted marking or spacing impulses are received in timed relation to the presentation of the low portions of the selector cams 2I through 25 to the cooperating lug followers 69 on the selector levers 6| through 65. Each marking or spacing impulse is received shortly prior to the presentation of the low part of the selector cams to the lug followers 69 and is received just prior to the presentation of one of the low portions of the locking cam 49. This allows the armature 28 to respond to the impulse and to be thereafter locked by the locking lever 46 if the impulse is a spacing impulse and by the locking lever 41 if it is a marking impulse. The armature 28 being locked in this manner assures that it will be in the correct position to properly control the setting of the selector levers 6I through 65. The locking lever 46 or 41 whose follower 52 has entered one of the low portions of the locking cam 49 is urged counterclockwise (Fig. 2) after each signal impulse is received by the proper selector levers 6I through 65 in order to allow the armature 28 to respond to the subsequent impulse received by the magnet 21.

The selector interponents 1I cooperating with the selector levers which have been moved to marking position drop behind the corresponding selector levers, and. the selector interponents 1I cooperating with selector levers which are in spacing position remain on top of the corresponding selector levers. When the selection of the selector levers has been made, extra high portions of the selector cams 2I through 25 move the selector levers counterclockwise beyond the normal positions thereof. When the selector levers are moved in this manner, the selector interponents H which have dropped behind the selector levers are moved further to the left and those selector interponents H which are positioned on top of their corresponding selector levers remain in the rightward position thereof (Fig. 2), the selector levers merel sliding beneath the feet 11.

As the selector interponents 1I move to the left in this manner they engage and push corresponding punch interponents 8I through to the left whereby the teeth 99 on the punch interponents so moved slip beneath and are thereafter latched by the latch bail 81. The punch interponents 8I through 85 having been latched in marking position, the selector interponents 1I return to the right due to the action of the springs 16 when the bail 56 is actuated by the cam 60. Shortly thereafter the selector interponent release bail 56 is pivoted clockwise by the cam 60 to lift all of the selector interponents 1I previously moved to marking position, leaving them on top of the selector levers, thus erasing the selection existing therein. By this time the selector cam sleeve I1 has commenced a second revolution and the signal received during the first revolution thereof is stored in the punch interponents 8| through 85.

The extended portions I11 on the punch interponents 8I through 85 which have been moved to the left (Fig. 2) or marking position are in positions for actuating their respective corresponding punches I44 when the punch interponents are raised. The toggle mechanism I01 for raising the punch bail IOI commences acr a e g. straightening at substantially the same time that the punch interponents are selectively positioned by the selector interponents I I, and is completely straightened at a time between the selection of the first and second impulses of the next succeeding signal. During the period when the toggle IU'I is straightening, the feed pawl I6! is being backed up and the feed hole punch Wheel I56 is rendered stationary by the detent I12 cooperating with the ratchet wheel I6 I.

The tape I66 being stationary during the upward movement of the punch bail IOI, the selected punches I44 are engaged on their shoulders I18 by the extended portions ll! of the punch interponents and the punches I44 are therefore raised vertically, the springs I49 holding the punches I44 within the slots I43 in the punch block I42. The punches I44 pierce the tape I66 leaving the chad attached thereto. Upon straightening of the toggle IIlI, the punches I44 attain their uppermost position. Thereafter, as breaking of the toggle I! continues, the pawl I6? engages a tooth in the ratchet wheel I6I to advance the feed hole punch wheel I 56 a step.

Such movement of the punch wheel I56 causes another of the punches I51 to enter one of the die holes I58 in the die wheel to punch another feed hole in the tape I66. The feed holes thus punched, like the code holes punched by the punches I44, have the chad attached to the tape. Besides punching the feed holes in the tape I66, the feed hole punch wheel I56 also advances the tape I66. The tape I66 is advanced while the punches I44 are being withdrawn therefrom and the punches I44 are therefore carried along with the tape I66 to the dotted position thereof represented by numeral I19. As the bail IEEI is lowered due to the breakingof the toggle I61, the extended portions I" of the punch interponents engage the feet IBI of the punches I44 to lower the punches from the tape I66. The

punches I44, upon withdrawal from the tape I66 are immediately snapped back into position in the 93 pivoting the bell crank 9| clockwise to raise the latch bail 81 from engagement with the teeth The springs I66 69 on the punch interponents. on each of the punch interponents then are free to move their punch interponents to the right or unselected position. Thereafter the entire punch ing mechanism is ready for the next selection.

A modification of the invention is shown in Fig. 6. In the following description of this em bodiment those parts which have reference numerals the same as parts already described are identical therewith. Only those parts are shown and described which are considered necessary-to differentiate from the first embodiment.

The shaft I3 has the selector cam sleeve I'I therearound which is under control of a selector clutch (not shown in Fig. 6). The selector cams are represented by the fifth selector cam and the selector levers are represented by the fifth selector lever 65. The selector levers are all mounted pivotally on the shaft 61 and are spring biased clockwise about the shaft 61 by individual springs 66. When a marking impulse is received the armature 2B is pulled up (as illustrated) by the magnet and the selector lever 65 is allowed to be biased in a clockwise direction when thelug 69 engages the low part of the cam 25-.

10 1 A set of five selector interponents, represented by the fifth selector interponents 20I, are pivotal on a shaft 202, and all are spring biased clockwise about the shaft 202 by springs 263 secured to the vertical arms 204. The shaft 202 is positioned within a cam slot 206 in each selector interponent 20L Each of the cam slots 206 has an upper horizontal portion 201 which allows the selector interponent 2M to slide horizontally a slight amount. In normal unselected position the selector interponents 2Ili are resting with the right extremities thereof on top of the selector levers 65. When any of the selector levers become selected they move clockwise sufiicientlyto allow the rightward extremities of the selector interponents 2I'II to slip therebehind and come to. rest momentarily on the bail 56. Thereafter; asthe selector cams 25 continue rotating, the extra high portions 18 thereof engage the lugs 69 to pivot the selector levers 65 counterclockwise. The upper portion of the selector levers 65 which have been moved in response to a spacing impulse slide beneath the rightward extremities of the unselectedselector interponents 26I and the selector levers 65 which have been moved in response to a marking impulse move the corresponding selected selector interponents 20I to the left, during Which movement the left ends of the selector interponents are raised due to the camming action of the shaft 202 within the slots 266. Raising the selector interponents MI in this manner causesa tooth 208 on each selected selector interponent 20I to become disengaged from a cooperating tooth 269 on each corresponding-punch interponent 2 I I There are five punchinterponents 2H which are mounted slidably; within the punch bail IEJI by means of a pair of comb'bars- M2 and M3. Each of the punch interponents M I has a vertiarm 2M to which is secured a spring 2I5 for biasing; thepunch interponents 25 I to the left. Therefore when the teeth 208 on the selector interponents 2DI become disengaged from the corresponding teeth 209'the punch interponents 2H are moved to the left by the springs 2I5. When the punch interponents 2| I are moved in this manner the extended portions III thereon are positioned suitably for actuating the corresponding. punches I44 asthe toggle IIl'I straightens.

A cam 2I'l secured to the punch clutch sleeve H3 cooperateswith; a follower 2I8'of a lever 2I9 mounted pivotally ati22I. A link 222 is secured pivotally at one end thereof to the lever 2I9 by a pivot bolt 223 and the other end of said link 222 issecured pivotally to a lever 225 by a pivot bolt 226. The lever 224 is mounted pivotally by a bolt 221 carries a bail 228. The two levers Zia-and 224' are urged in a counterclockwise direction by a spring 229. When the high portion of the cam 2I'I. engages the follower fililthe two levers 2I9 and 22 i are pivoted clockwise and the bail 228 is moved to the right. The bail ailengages a lug 261 on each of the previously selectedpunch interponents 2H and moves the punch interponentsvto the right where they are latched by the teeth 208 and 269. The teeth 268; and 269 each have cam surfaces thereon and the punch interponent 2I I can move vertically sufiiciently in the slots in the comb bar 2I3 so that the tooth 209 can slip past the tooth 208.

Shortly after the selection set up in the selector interponents MI is transferred to the punch interponents 2| I the bail 56 is raised in the manner hereinbefore described to strip the selector interpcnents 28I from behind the selector levers 69 and thereby erase the selection existing in the selector interponents 2!. A subsequent revolution of the selector cam assembly produces a new selection in the selector interponents 2M. Just prior to a complete break of the toggle I81 to the position thereof shown in Fig. 6 the high portion of the cam 2I1 engages the follower 2I8 causing the punch interponents 2 II to be moved to the right and latched in unselected position. Thereafter the follower 2I8 rides oh the high portion of the cam 211 and the spring 229 causes the bail 228 to be withdrawn from the teeth 23I. The new selection, having been set up in the selector levers 65 and selector interponents 28I, is then transferred to the punch interponents 2II in the manner previously described.

In this modification of the invention a set of pivoted punches I44 are movable within a pivoted punch block 24I (Fig. 8). A punch block frame 242 is secured pivotally to the side plates II at pivot points 243 and has the pivoted punch block 24I secured thereto. The horizontal portion of the punch block frame 242 serves as a die block 248. Horizontal extensions 244 on the punch block frame 242 have slots 246 (Fig. 6) in the extremities thereof within which a pair of studs 241 protrude. When the punch bail IOI is raised, due to the straightening of the toggle I91, the studs 241 within the slots 246 raise the horizontal extensions 244 of the punch block frame 242 pivoting the punch block frame 242 counterclockwise.

A pair of tape feed pawls 248 and 249 are secured pivotally to the punch bail HJI by a bolt 25I and are biased towards a feed ratchet wheel 252 by a spring 253. The feed pawl 249 is adapted to engage a tooth in the ratchet wheel 252 to rotatably advance the wheel 252 clockwise (Fig. 7) during the down stroke of the punch bail IOI and the feed pawl 248 engages a tooth on the ratchet wheel 252 to advance the wheel 252 during the up stroke of the punch bail I8I. The feed ratchet wheel 252 is secured to the sleeve I55 to which is also secured the tape feed hole punch wheel I56. The feed hole punch wheel I56 cooperates with the feed hole die wheel I59 to punch feed holes in a tape advancing therebetween in the manner hereinbefore described.

Assuming that a selection has been set up in the punch interponents 2I I the operation of the pivoted punch block is as follows. As the toggle I81 straightens, the punches I44 corresponding to those punch interponents 2II which have moved to the left (Fig. 6) are raised to perforate the tape I66 (not shown in Fig. 6) as the tape moves through a tape slot 254. At the same time the punch block 24! is pivoted forward (Fig. '7) carrying with it the punches I44. Also at the same time the feed pawl 248 engages and advances the ratchet wheel clockwise to advance the tape an amount equal to the distance the punch block 24I is pivoted. On the return stroke of the punch bail IOI, as the toggle I01 breaks, the pawl 249 advances the tape further and the punch block moves back to the position shown in Fig. '7. The punches I44, being within the perforations in the tape at the start of the return stroke of the punch bail IOI, are carried along with the tape and pivot relative to the punch block 24I until they are withdrawn from the tape, whereupon they snap back into the normal position thereof as shown in Figs. 6 and 12 7. The holes perforated in the tape, like those perforated by the reperforator comprising the first embodiment of the invention, are of the chadless type.

Following is a description of a backspace mechanism for the reperforator having pivoted punches and a pivoted punch block. A ratchet wheel 26I is secured to the sleeve I55 and normally rotates therewith. A manually operable plate 282 has a bent over top portion 263 by means of which the plate 262 may be depressed. A pin 264 secured to the side plate II protrudes through a longitudinal slot 266 to guide the plate 262 when it is depressed. A wide slot 261 in the plate 262 surrounds the sleeve I55 and prevents the plate 282 from moving laterally. A pin 288 secured to the plate 262 has a spring 269 attached thereto which spring 269 is also attached to the pin 264 and continuously urges the plate 262 upwards. A pawl 21I is secured pivotally to the plate 262 by a bolt 212 and has a depending arm 213 having a cam surface 214 thereon which cam surface 214 cooperates with an adjustable eccentric 216 secured to the side frame II. The pawl 21I also has a horizontal arm 211 which carries a spring 218 secured at its other end to a horizontal arm 219 on the plate 282. The spring 218 tends to urge the pawl 21I in a clockwise direction towards the ratchet wheel 26I but the pawl 21I is held disengaged from the ratchet 26 I normally due to engagement of the cam surface 214 on the depending arm 213 with the eccentric 216. Therefore, during normal operation the ratchet wheel 26I is free to rotate as the sleeve I55 rotates.

The plate 262 carries a pin 28I substantially opposite the pin 268 which is adapted to cooperate with the lower portions of the pawls 248 and 249 when the plate 262 is depressed to cam said pawls 248 and. 249 from engagement with the ratchet wheel 252. When the plate 262 is depressed the pawls 248 and 249 are cammed from engagement with the ratchet wheel 252 after which the cam surface 214 overrides the eccentric 216 allowing the spring 218 to urge the pawl 21I against the ratchet wheel 26I. Upon further depression of the plate 262 the pawl 21I engages a tooth on the ratchet wheel 26I and moves the wheel 26I counterclockwise, thus backing up the tape (not shown) over the feed hole punch wheel I56.

A chad flattener 282 has five wedge-shaped lugs 283 positioned on the under side thereof which are aligned with the five punches I44 positioned in the punch block 24I. The chad flattener 282 is formed with a pin 284 integral therewith which pin 284 is slidable longitudinally in a hole 286 through the punch block 24 I. A pin 281 secured to the punch block frame 242 also helps to position the chad flattener 282 by extending through a hole (not shown) in the chad flattener 282. A horizontal arm 288 has a tension spring 289 secured thereto which spring 289 is secured at its other end to the chad fiattener 282. A rod 29I is positioned within the spring 289 to maintain the chad fiattener 282 out of engagement with the tape at all times except when a backspacing operation is in progress.

In the operation of the chad flattener 282 during a backspace operation the chad flattener 282 is lowered during the first part of the depression of the plate 262 due to the urging of the spring 289. When the chad fiattener 282 is lowered in this way one of the wedge-shaped lugs 283 is lowered above each row of perforations 13 in the tape into the slots 292 in the die block 249. Further depression of the plate 262 merely stretches the spring 289 and the lugs 283 are held in their lowered position until the plate 262 is released and pulled up by the spring 269 until the rod 289 lifts the chad flattener 282.

The lids in the tape as it is being perforated are hinged at the forward end thereof so that when the tape is backspaced the tendency is for the lids to turn upwards. However, when the Wedges 283 are brought downwards against the tape the lids in, the tape are directed downwards into the apertures in the tape so that when the tape is backed up by the backspace mechanism the lids will not interfere.

In Fig. 10 there are shown several different shapes of punches 30!, 302, 393, and 394 all of which may be used with the invention. The punch indicated by reference numeral 33: produces a chadless tape with apertures having round backs. The punch 392 produces a square aperture in the tape like that shown in Fig. 5. The punch 303 produces a hole substantially round except for a narrow lid. The punch 3M merely pierces the tape.

Figs. 11, l2, l3, and 14 show various types of tape feed hole punch wheels and die wheels. In Fig. 11 a feed wheel 306 has round feed hole punches 397 which mesh with elliptically shaped die holes 398 in a die wheel 309. In Fig. 12 a feed wheel 3 H has square feed hole punches 3l2 adapted to enter a peripheral groove 313 in a di wheel 31. Fig. 13 shows a feed wheel 3l5 having square feed hole punches 3!! which mesh with substantially square holes am in a die wheel 359. Fig. 14 shows a feed wheel 32I having needle pointed punches 322 which mesh with substantially round holes 323 in a die Wheel 3224.

Various changes and modifications may be made in the invention without departing from the scope thereof.

What is claimed is:

1. In an apparatus for perforating a control form, a plurality of pivotally mounted punches, a die block having a plurality of open faced slots for cooperating with said punches to perforate the control form, means for normally holding the punches in a nonperforating position, toggle means for moving said punches into said open faced slots to thereby perforate the control form,

said toggle means further functioning to withdraw said punches from the control form, and a rotary punch means operated by the breaking of the toggle for punching and advancing the corn trol form while said punches are being withdrawn therefrom, whereby said punches are pivoted against the effect of the holding means by the advancing control form While being moved out of said open faced slots in said die block.

2. In an apparatus for perforating a control form, a plurality of pivotally mounted punches for perforating the control form, a pivotally mounted punch block normally positioned in nonperforating position and having a plurality of open faced slots for guiding said punches, means for normally holding the punches within the slots in nonperforating position, means for pivoting said punch block into perforating position and for returning said punch block to nonperforating position, means for actuating said punches, whereby said punches are moved to perforate the control form and thereafter returned to normal position, and means for advancing the control form during the pivotal movement and return to nonperforating posi on. of,- said punch block; saicl punches being moved-to; perforate the control form during the pivotal movement of said punch block and said punchesbeing returned by the holding means. to normal-position-during the return of said punch blQQktQ nonperforating position, whereby said punches: are moved. pivotally against the effect of the holding, means within, said open faced slots in said punch block, by the, advancing control formduring the return'of said punches to normal position.

3., In an: apparatus. for perforating a control form, a pivotally mounted, punch, a pivotally mounted; punch block normally positioned in noneperforating position and having an open faced slot for guiding said punch, means for normally retaining the punch within the open faced slot; innonperforating; position, a die block secured tosaid pivotally mounted punch block and having. an open faced slot for cooperation with said punch to perforate they control form, means for pivoting saidv punch and-die blocks into perforatingposition and for returning said punch and die blocks to nonperforating position, means for. actuating said punch, whereby said punch is moved within said open faced slots in said punch and. die blocks toperforate the control form and thereafter returned to normal position, and means for advancing the control form during thepivotal movement and return'to nonperforatingx position of; said punch and die blocks; said punch being moved to perforatev the control form during the pivotal movement of said punch and die blocks and said punch being returned by the retaining means to normal position during the return of said punch and die blocks to nonperforating position, whereby said punch is moved pivotally against the effect of the retaining means within said open faced slots in said punch and die blocks by the advancing control'form during the returnof said punch to normal. position.

4. In an apparatus for perforating a control form, a plurality of pivotally mounted punches a pivotally mounted punchblock normally positioned in nonperforating. position and having a'plurality: of open faced slots for guiding said punches, resilient means for normally retaining the punches within the slots in nonperforating position, a die block secured to said pivotally mounted punch block and having a plurality of openfaced slots for cooperating with said punches tO-PBI'fOlitS the control form, means for pivoting said-punch and die blocks into perforating position and for returning said punch and die blocks to. nonperforating position, means for actuating said punches, whereby said punches are moved'within said open faced slots in said punch and die blocks to perforate the control form and thereafter returned to normal position, and means for advancing the control form during thepivotal movement and return to nonporforating position of said punch and die blocks, saidpunches being moved to perforate the control form during tliepivotal movement of said punch and die blocks and said punches being returned by theresilient means to normal po-- sition during the return of said punch and die blocks to nonperforating position, whereby said punches are moved pivotally against the effect of the resilient means within said open faced slots in said punch and die blocks by the advancing control form during the return of said punches to normal position.

5. In an apparatus for perforating a control form, a movable punch block having a plurality of open faced slots therein, a punch positioned within each of said slots, means for retaining said punches against the rear walls of said slots, means for moving said punch block into and out of perforating position, means for simultaneously moving the punches into and out of perforating position during the movement of the punch block into and out of perforating position, and means for advancing the control form during the movement of the punch block into and out of perforating position, said punches being pivoted against the effect of the retaining means by the advance of the control form during a portion of the return movement of the punch block to the nonperforating position.

6. In an apparatus for perforating a control form, a pivotally mounted punch block having a plurality of slots formed therein, a punch positioned within each of the slots, means for urging the punches against the rear walls of the slots, engaging means for moving the punches and simultaneously pivoting the punch block into perforating position, means for advancing the control form during the punching operation in the direction of the pivotal movement of the punch block, means for subsequently withdrawing the punch block and punch from the perforating position, and means for further advancing the control form in the aforementioned direction during the return movement of the punches and punch block to the nonperforating position.

7. In an apparatus for perforating a control form, a pivotally mounted punch block having a plurality of slots formed therein, a punch positioned within each of the slots, means for normally retaining the punches in a nonperforating position against the rear walls of said slots, means for engaging the punches, means interconnecting the punch block and the engaging means, a toggle connected to .said engaging means and normally broken to maintain the punches and punch block in a nonperforating position, means for straightening the toggle to move the punches and punch block into perforating position, and means for simultaneously advancing the control form upon movement of the punch block.

8. In an apparatus for perforating a control form, a punch block having a plurality of slots formed therein, a punch positioned within each of said slots, means for urging said punches against the rear walls of said slots, means for engaging the punches to move them into perforating position, a normally broken toggle connected to the engaging means for maintaining the punches in a nonperforating position, means for straightening and breaking the toggle to move the engaging means and punches into and out of the perforating position, a rotary punch, a ratchet for advancing the rotary punch to advance the tape, a pawl operated by the breaking of the toggle for engaging and advancing the ratchet to advance the rotary punch to advance the control form during the return of the punches to the nonperforating position.

9. In an apparatus for perforating a control form, a plurality of first punches, means for normally retaining the first punches in a nonperforating position, means for moving the first punches into and out of a perforating position, a rotary punch, means actuated by the first punch moving means during the movement of the first punches into and out of the perforated position for advancing the rotary punch to advance the control form unidirectionally, control form backspacing means for moving the rotary punch in a direction opposite to that of the advancing means, and means for disengaging the rotary punch advancing means upon actuation of the backspacing means.

10. In an apparatus for perforating a control form, a plurality of punches adapted to perforate lidded apertures in the control form, means for moving the punches into and out of a perforating position, means for advancing the control form subsequent to each perforating operation, a mechanism for disengaging said control form advancing means and moving the control form backwards, and means rendered effective upon operation of said mechanism for guiding the lids formed during the perforating operation to facilitate the backward movement of the control form.

11. In an apparatus for perforating a control form, a plurality of pivotally mounted punches, means for moving the punches into and out of position to perforate the control form, means for urging said punches against pivoted movement during said movement of the punches into and out of perforating position, a rotary punch normally engaging said control form, means operated by the said moving means subsequent to a perforating operation for rotating the rotary punch to perforate and advance the tape, said rotary punch causing the control form to engage and pivot the punches against the effect of the urging means, a mechanism for disengaging the means for rotating the rotary punch, said mechanism including means for rotating the rotary punch to backspace the control form.

JEROME L. DE BOO.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 85,661 Helms Jan. 5, 1869 228,866 Smith Jan. 27, 880 589,570 Palmer & Denmead Sept. 7, 1897 652,754 Davis July 2, 1900 800,732 Forthun Oct. 3, 1905 1,048,560 McCall Dec. 31, 1912 1,254,470 Caldwell Jan. 22, 1918 1,721,486 Lautenschlager July 16, 1929 1,938,318 Colby Dec. 5, 1933 1,994,913 Howell Mar. 29, 1935 2,084,869 Rosenberg June 22, 1937 2,273,265 Heyel Feb. 27, 1942 2,833,024 Mathes Oct. 26, 1943 2,442,567 Jesseph June 1, 1948

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