US1873554A - Perforating machine - Google Patents

Description

Aug. 23, 1932. c w CRUMR|NE 1,873,554

PERFORA'IING MACHINE Filed Sept. 11. 1930 Gar? Fla]

- INVENTOR Chester- WCramrr/ze 7zz's ATTORNEY Patented 1 Aug. 23, 1-932 UNITED STATES PATENT. orFma CHESTER W. CRUMRINE, OF ROCHESTER, NEW YORK, ASSIGHOR '20 WIAFIIO TYPEWRITERS, INCL, OF ROCHESTER, NEW YORK, A CORPORATION NEW You PERFORMING MAUHINE Application filed September 11, 1980. .Serial No. 481,214.

This invention relates to improvements in perforating machines, and especially to machines of this kind which are employed for perforating master sheets used for controlling the operation of typewriting machines or other machines controlled by means of a master sheet of this kind.

In the operation of typewriting machines by master sheets in whlch extreme rapidity m is desirable, when two adjacent type bars are operated in rapid succession, it frequently happens that the second type bar moves into the path of the first before the latter has ,returned from its printing position. When this happens, the second type bar strikes the first and cannot reach the printing position. When the type bars are more wldely separated from each other, the angle between them at the printing point is wider and their zo paths overlap each other for a shorter distance so that a return movement of the first through only a short distance is necessary to withdraw it from the path of the second. The successive perforations in master control sheets for such machines are usually as close together as possible so that when adjacent type bars are to beoperated by such sheets, the second frequently fails to print.

It is the object of this invention to provide a perforating machine on which the master sheet is made with simple and inexpensive means forpreventing the formation of a second adjacent perforation until after the sheet has been advanced a second space, thus providing a wider space distance between the adjacent perforations corresponding to a longer time interval between the successive actuations of the adjacent type bars in the machine in which the sheet is to be used.

Another object of the invention is to provide a perforating machine of this kind with means for locking the adjacent keys against operation when a key is actuated, said locking means being automatically released when a space key or other non-adjacent key is actuated.

To these and other ends, the invention consists in the construction and arrangement of parts that will appear from the following description when read in con'unction with the accompanying drawing, t e novel features being pointed out in the claims at the end of the specification.

In the drawing:

Fig. 1 is a transverse section of a rforating machine illustrating one embo ent of th% lnventiolg 1 I 'ig. 2 is a a enta an view of a ortion cf the ke 'bfird Or in; same; p

Fig. 3 is a agmentary front elevation of a portion of the keyboard, parts being removed to expose underlying parts, and

Fig. 4 is an enlarged fragmentary detail view of the locking devices.

Referring particularly to the drawing in which similar references refer to the same parts in all the views, and in which one pos sible embodiment of the invention is illustrated applied to a power driven perforating machine of well known type, said machine comprises a die 1 having a plurality of openings in its front side with which the perforating punches 2 cooperates to perforate a work sheet 3 arranged on the die. The work sheet is supported 1n a paper apron 4 arranged beneath the die and supported on a fixed part from which it is directed upwardly over the front of the die and the openings therein to a feed roller 5 having a ratchetfi fixed thereto which is engaged by devices presently to be described for turning the roller step by step to move the work sheet forwardly to space, the perforations produced by the punches longitudinally thereof.

The punches 2 are slidably mounted in guideways provided therefor in a punch guide 7 and at their forward ends are operatively connected with the upper ends of levers 8 pivoted on a rod 9 extending across the machine and mounted on the punch guide 7. At their lower ends each of the levers 8 is bifurcated at 10 to provide a slot whereby it is operativcly engaged by a laterally projecting stud 11 on a bell crank lever 12 pivoted on a rod 13 also extending across the machine. The lever 12 has an arm 14 to which the upper end of a link 15 is pivoted, the other end of said link being pivoted to an arm 16 of a bell crank lever pivoted at 17 to the frame of the machine. The other arm 18 of the bell crank rojects downwardly from its ivot and at its end carries a cam 19 revolu I mounted thereon and arranged adjacent t 0 surface of a power driven roller 20. The cam 19 has a reentrant rtion which normall faces the roller and is arranged closely a jacent its surface but out of contact therewith, in which position the cam is maintained by astop lever 21 ivoted on the bell crank and has its lower en arran in the path of a stop on the cam. Sai lever has an ofiset rtion 22 at its other end which is engaged y the bifurcated end 23 of an arm 24 on a key lever 25 also pivoted on the shaft 13.

The lever 21 has two ofiset portions 21 and 21" on its lower end which are spaced from each other, one of which, 21", is normal- 1 in the path of the stop on the cam. When the key lever is actuated to swing the lever 21, the offset portion 21 moves from the stop and releases the cam, while the other ofi'set portion 21" moves into the path of the stop to arrest the cam, if the key lever be held depressed. When the cam is released, it is moved forwardly into frictional engagement with the roller 20 under the action of a springpressed finger 27 pivoted on the bell crank and engaging a lug or projection 28 on the cam. The cam 19 is rotated by its engagement with the driven roller 20 and as it rotates swings the bell crank on its pivot 17, and the lever 12 through the link 15 to actuate the lever 8 to move the unch toward the die to perforate the sheet t ereon. A s ring 30 connects the key lever 25 with a fixe part and resiliently maintains it and the parts connected therewith in normal position, shown in Fig. 1 of the drawing, and a spring 31 connects the bell crank lever 12 with a fixed part and resiliently maintains the lever 8 in retracted position with its stop arm 32 in enga ment with the punch guide.

be hell crank levers 12 have rearwardly rojecting arms 33 which engage a universal ar 34 extending across the machine and pivoted at 35 on the frame of the machine. The universal bar 34 has a rearwardly extending arm 36 pivotally connected with one end of 1a link 37, the other end of which is pivoted to an arm 38 pivotally mounted on the shaft 39 of the feed roller 5. A pawl 40 is pivotally mounted on the arm 38 and resiliently engages the teeth of the ratchet 6 under the action of the spring 41 which connects the pawl with the arm 38. A sprin 42 is connected with the arm 36 at one en and-has its other end anchored on the frame of the machine and is operative to move the link 37 and turn the arm 41 into engagement with a stop 43 secured in a fixed part of the machine. When a key 44 is operated to depress a key lever 25, the power operated devices are set in motion, as previously explained, to actuate the bell crank lever 12 to operate one of the savanna Bunches 2. At the same time, the universal ar 34 is actuated against the tension of the spring 42 and swings the arm 38 away from t e stop 43 and retracts the awl 40 over a tooth of the ratchet wheel. on the bell crank 12 returns to normal ition under the action of the spring 31, t e punch 2 is retracted from the work piece and the universal bar is released to rmit the sprin 42 to swing the arm 38 an with it the paw 40 to turn the feed roller and advance the work sheet.

When two perforations are formed in the master sheet by the same punch in close prox- 1m1 liab e to pass the parts designed to be operated thereby'before the return to normal to each other, the second perforatlon is position after actuation y the first perforation, with the result that the second perfora-= tion fails to actuate said parts. To overcome this liability, means are provided for 199 thepunchkeysdepressedwhenactuated. Sai nfeans com rises a locking bar 46 extending across the rout of the ke board and having rearwardly and downwar y extending arms 47 at its ends whereby it 1s pivoted to the frame of the machine. The upper edge of the bar 46 is bent rearwardly to form a lip adapted to engage cut-awa portions 48 formed in the front ends of the ey levers 25. A sp 49 connects the arm 47 with a fixed art an operates to maintain the lip on the locking bar resiliently engaged with the cut-away rtions in the front of the key levers. At upper ends, the cut-awa portions are prov1 ed with upwardly an forwardly inclined walls 51 which are adapted to engage the lip on the locking bar when the key lever is depressed and cam said bar forwardly againstrelease the previously actuated key lever and permit its spring 30 to return it to normal position, when it may be actuated again to perforate the sheet.

As lpreviously stated, it is also desirable to lockt e adjacent keys against actuation when a key is depressed until the work sheet is advanced :one or more spaces since too rapid actuationj'of adjacent type are in a t pewritin machine in which the rfora sheet is to used is to be avoid As usual in this t e of machine, the key levers are guided at t eir front ends in vertical slots 53 in a comb 52 extending across the front of the keyboard and secured to the frame of the machine. The

slots 53 in the comb are spaced uniform dis-- tances apart, corresponding to the horizontal eir evee spacin of the key levers. Suspended on the sides the comb are looking devices 54 which swing to a normal position under the force of gravity. The locking devices 54' are sectorial 1nform, and when in the normal position pro'ect over adjacent slots 53 into the paths of e adjacent key levers, so that when one of said key levers is depressed the locking devices in its path are cammed by the key levers and swung laterally thereby toward the paths of the adjacent key levers, and the descending key moves into the path of the locking devices and retains them 111 the paths of the adjacent key levers and prevents actuation thereof. The depressed key lever is retained in its depressed position by the locking bar 46 which is moved to release the key lever when another key or the spacing key is actuated, as previously explained.

Since the key levers are arranged as closely together as possible, the slots in the comb are also arranged very closely together, and the lockin devices are arran d alternately on opposite sides of the com so that they are free to swing laterally in opposite directions without engaging the adjacent lockin devices. By this arran ement, each 0 the locking devices normalfy lies in the paths of both of the key levers between whlch it is pivoted, and two adjacent locking devices on opposite sides of the comb are normally arranged to swing into and out of the path of each of the key levers. A locking member 56 is arranged beneath all of the key levers and locked in en agement therewith by a member control ing means whichconnects the driven roller 20 with power devices, such as an electric motor. When the driven roller is silenced, the key levers are locked against actuation.

Although only one embodiment of the invention is shown and described herein, it will be understood that this application is intended to cover such chan es or modifications as come within the s int of the invention or see c of the followmg claims.

claim:

1. In a perforatin machine, the combination of a die, means %or feeding a work sheet thereover, punches coo rating with the die to perforate the work s eet, key levers operatively connected with said punches, means operatively connected with said key levers for actuating the sheet feeding means to space the rforatlons in the work sheet, means for retaining any of said key levers depressed when operated to actuate a punch, locking devices arranged in the path of one of said key levers and movable into the path of adjacent key levers when said key lever is depressed for locking said adjacent key levers in normal position while other key levers are free to be operated, and means on another of said key levers for releasing said retaining means retaining any of said key levers depressed when operated to actuate a unch a air of locking devices arranged in t e path 0 one of said key levers and movable in opposite directions therefrom when said key ever is depressed to lock immediately adjacent key evers against actuation while the first key lever is depressed and other key levers are free to be operated, and means on another of said key levers for releasing said retaining 'means.

3. In a rforat-ing machine, the combination-of a re, means for feeding a work sheet thereover, punches coo crating with the die to perforate the work s eet, key levers operatively connected with said punches, means operativel connected with said key levers for actuatm the sheet feedin means to space the rforatlons in the work s eet, means for retaining any of said key levers depressed when operated to actuate a punch, a slotted guide comb in which said key levers are guided, independently operable locking devices pivoted on said comb between adjacent slots and movable by gravity to a normal 0- sition projected into the paths'of adjacent ey levers, cams on said locking devices adapted to be engaged by one of said ke levers when depressedto move the locking devices in opposite directions from its path and engaged y the key. lever when so depressed forretaining the locking devices out of its path and in the paths of the immediately adjacent key levers to lock the latter against actuation, and means for releasing said retaining means when another key is depressed to operate the sheet feeding means.

.4. In a erforating machine, the combination of a ie, means for feeding a work sheet thereover, punches cooperating with the die to perforate the work sheet, key levers operatively connected with said punches, means operatively connected with said key levers for actuating the sheet feeding means to space the perforatlons in the work sheet, means for retaining any of said key levers depressed when operated to actuate a punch, a slotted guide comb in which said ke levers are guided, locking devices pivote alternately on opposite sides of said guide comb between the slots and projecting into the paths of the adjacent key levers, cams on said locking devices adapted to be engaged by said key levers when depressed to move a locking device on each side of said comb from its path and engaged by the key lever when so depressed for retaining the locking devices out of its path and in the paths of the immediately adjacent key levers to lock the latter against actuation, and means-for releasing said mtaming means when another key is depressed to operate the sheet feeding means.

5. In a rforatin machine, the combination of a 3, means or feeding a work sheet thereover, punches cooperating with the die to perforate the work sheet, key levers operatively connected with said punches, means operatively connected with said key levers for actuating the sheet feedin means to space the perforations in the wor sheet, means for compelling the depression of a key to feed the work sheet between successive alternate depressions of keys immediately ad'acent each other, said means comprising a s otted comb in which the key levers are guided, locking devices on said comb between adjacent slots and projecting into the aths of the adjacent key levers and movab e out of the path of one of said ke levers when depressed and retained there y in the path of adjacent key levers to lock said adjacent key levers against actuation, retaining means for locking the key in depressed position, and

evers for remeans on anot er of said key leasirig said retaining means.

6. n a rforatin machine, the combina- 33 tion of a ie, means or feeding a work sheet thereover, punches coo rating with the die to perforate the work 5 eet, key levers operatively connected with said punches, means operatively connected with said key levers for actuating the sheet feedin means to space the rforations in the wor sheet, means for retaining any of said key levers depressed when operated to actuate a punch, a slotted comb in which said ke levers are guided lockin devices movabl mounted on sai comb tween adjacent ey levers and projecting into the aths of sad key levers, cams on said locking evices ada ted to be engaged bly said key levers when epressed to move t e adjacent lockinfilgevices from their path and retain said 100 devices in the paths of the immediately ad acent key levers while depressed to lock said adjacent key levers against actuation, and means for releasing said retaining means when another key is depressed to operate the sheet feeding means.

7. Ina rforatin machine, the combination of a 1e, means or feeding a work sheet thereover, punches coo rating with the die to perforate the work s eet, key levers operatively connected with said punches, means operatively connected with each of said key levers for actuating the sheet feeding means to space the perforations in the work sheet, means for compelling the depression of a key lever to feed the work sheet between successive depressions of the same key and successive alternate depressions of immediately adacent keys, said means comprising a device I for retaining any of said key levers depressed eeann when operated to actuate a punch, independently o rable locking devices in the paths of said e levers and movable from the path of a ke ever when depressed and retained by said ey lever in the paths of the ately adjacent key levers to lock them against actuation while said key lever is depremed, means on another of said ke levers for releas- I ing said retaining device w en any one is actuated to perforate and space the work sheet, 76' and a space key for releasing said retaini? device and spacing the work sheet indepen ently of the perforati devices.

In witness whereof, have hereunto sign my name. 8b

CHESTER W. GRUMRINE.

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