US1196707A - Machine for perforating pattern-sheets. - Google Patents

Description

C. LEA.

MACHINE FOR PERFORATING PATTERN SHEETS.

APPLICATION FILED APII.22, |912.

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'MACHINE FOR PERFORMING PATTERN SHEETS.

APPLICATION FILED APR. 22, 1912. 9?@70 Patented Aug. 29, 1916.

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MACHINE FOR PERFORATING PATTERN SHEETS.

APPLICATION FILED APII.22. 1912.

PatentedAug. 29, 1916.

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c. LEA.

I MACHINE FUR PERFGRATING PATTERN SHEETS. APPLICATION FILED APII.22. I9I2.

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CHARLES LEA, OF DORC'HES'IER, MASSACHUSETTS, ASSIGNOR TO AMERICAN WARP DRAWING MACHINE COMPANY, A CORPORATION OF MAINE.

i MACHINE FOR PERFORATINGPATTERN-SHEETS.

Speciication of Letters Patent.

Application filed April 22, 1912. Serial No. 692,470.

To all whom it may concern n Be it known that I, CHARLES LEA, a citizen of the United States, and a resident of Dorchester, county of Su'olk, and Commonwealth. of Massachusetts, have invented anI will be best understood by reference to the` following specification, when taken in connection with the accompanying illustration of one specific embodiment thereof, while' its scope will be more particularly pointed out in the appended claims. y

In the drawingsz-Figure 1 is a longitudinal vertical sectional view, partly in elevation, of a perforating machine embodying my invention; Fig. 2 is an elevation, partlyl 1n vertlcal section, of 'the machme as viewed from the left-hand side of Fig. 1; Fig. 3 is va detail sectional view on the irregular line 3 3 of Fig. 2 looking toward the left, showing a portion of the paper-feeding and drum-rotating mechanism; Fig. 4 is a detail plan view of a portion of the table withthe sheet guides and sheet tensioning device. Fig. 5 is a detail plan of a portion of the machine, showing the punch-actuating drum and its inclosing casing or guard; Fig. 6 is a detail sectional view on, line 6-6 of Fig. 2 looking toward the right, showing the brake; Fig. F7 is a detail sectional view on line 7 7 of Fig. 2; Fig. 8 is a sectional view on line 8-8 of Fig. 7 ;l Fig. 9 is a plan of a portion of an illustrative pattern sheet perforated on the machine; and Fig. 10 is a plan of a portion of a designersy draft corresponding to the portion of the pattern sheet illustrated in Fig. 9.

' Referring to the drawings, and to the embodiment of my invention which I have.

there disclosed for illustrative purposes, I have there shown a perforating machine having a frame 11 for supporting the operative parts of the machine. 0n this frame, there may be mounted suitable means for supporting a supply of the sheet material,

herein a -shaft 12 supported on the bracket or brackets 13 and having flanges 14, between which may be placed a roll 15 of sheet material 16, which may be thin sheet metal, paper, or any other suitable material.

The 'sheet material may be led from the roll across a suitable table or platen 17, and may be guided on the latter by guides 18 and 19 engaging the edges of the material. Preferably these guides are mounted in grooves 2O and 21 respectively, provided in the table 17. There may be provided grooves 22 and 23, also adapted to receive the guides 18 and 19 respectively. At certain times in the operation of the machine, it may be desirable to shift the guide 18 from the groove 2() to the groove 22, `and the guide 19 from the groove 21 to the groove 23, to shift the sheet transversely for a purpose which will appear hereinafter. For narrower strips of the sheet material, there may be provided grooves 24, 25, 26 and 27, adapted to receive the guide,.19.

There may be provided suitable sheet tensioning'means, herein a friction bar 28 restingy upon the sheet material and pressed against the latter by suitable means, herein a pair of springs 29, encircling two studs 30 respectively, passing loosely through the bar 28, and secured to the frame 11.

It will be observed by reference to Fig. 1 that the guides 18 and 19 are provided with shallow notches terminating at their ends adjacent opposite edges of the friction bar 28, and that the friction surface of the latter is intermediate the top and bottom of the guides. It follows that the latter cannot become displaced without first removing the friction bar.

The sheet material may be fed across the table 17 by suitable feeding means, preferably one which will impart a positive feeding movement to the sheet and preferably impart to the latter a step-by-step feeding movement, with its feeding movement in the intervals between the punching operations, as will appearhereinafter. Preferably the sheet-feeding mechanism comprises a feedwheel, or a pair of feed-wheels, 31 provided r upon the machine, but preferably they are punched simultaneously with the punching ofother perforations in the sheet, as will appear hereafter.

The feed-wheels 31 may beymounted on a shaft 34 journaled in suitable bearings 35 and 36 and may be given an intermittent rotative movement by any suitable mechanism. Herein for this purpose, I provide a ratchet 37 secured to the shaft 34', and coperating carried by a pawl-v withfa suitable pawl 38 carrier 39, mounted to slide vertically on the frame 11,-herein being provided with slots 40 and 41, the former receiving a stud 42, and the latter receiving a shaft 43. The pawl 38 may be mounted to slide in a recess 44 provided in the pawl-carrier 39, and may be held in yielding engagement with the ratchet 37 by a suitable spring 45 located in said recess and bearing against the inner end of said pawl. The pawl-earrier 39 may be given a vertical reciprocatory motion by suitable means, herei-n an eccentric 46, engaging a horizontal slot 47 provided in said pawl-carrier. This eccentric may receive a rotary motion from a shaft 48, to which it is secured, said shaft also being driven in any suitable manner, as for example by being provided with a s1nall.flywheel 49, having a grasping handle 50.I By this 1 neans, the pawl 38 is given a vertlcal reciprocatory motion, and conseqently engages successlve teeth on the periphery of the ratchet 37, thus e imparting an intermittent rotary motion to the latter. There may be provided a stoppawl 51, pivotally mounted on a stud 52, and engaging the ratchet 37 to prevent reverse rotation of the latter. If desired, this stud may be made horizontally adjustable in a slot 53 providedin the frame 11, and may be provided with a nut 54 to hold the same in the desired position of adjustment.

The feed-wheels 31 may be adjusted longitudinally of their axes, and relatively positioned with respect to the perforating means in a plurality of vpredetermined posi# tions transversely of the sheet, by providing the shaft 34 with a sleeve 55 having grooves 56- and 57, either of which is adapted to.

receive a positioning pin 58. Herein this pin is arranged tangentially with respect to the sleeve 55 and is mounted to slide longitudinally in a suitable guide-way 59 provided in the bearing 35. This pin, serves normally to lock the sleeve 55, and consequently the shaft 34 and feed-wheels 31,.

against longitudinal movement, since the sleeve is mounted on .a reduced portion 60 of the shaft between a. shoulder 61 and a washer -62 secured to the outer end of the sleeve. The pin may be provided with a reduced portion 63, which when the pin is moved from the position shown in Fig. toward the left into register wltlrthe periphery of the sleeve 55, will permit the latter to be moved together with the shaft 34 and feed-wheels 31 longitudinally a distance equal to the distance between the two grooves 56`and 57 The sleeve 55, shaft 34 and feedwheels 31, may then be locked in their new position by sliding the positioning pin longitudinally into the proper position to engage with the groove 57. The longitudinal movement of the positioning pin 58 may be limited by suitable means, herein screws 64 and 65 threaded into opposite ends thereof, and having heads larger in diameter than the body portion of the pin.

The sheet may be perforated by any suitable perforating mechanism, but I prefer to employ for this purpose a series of punches 66 of any desired. number, herein eight, arranged in a row extending transversely of the sheet, and I may also provide two punches 67 located at opposite ends respectively of said row. Herein the punches 67 are utilized .for the purpose of punching the two rows of perforations 33 adjacent opposite edges respectively of the sheet to receive the teeth 32 of the feed-wheels 31, while the remaining punches 66 are utilized for punching rows of suitable perforations for the 'pattern located between the two rows of perforations 33. All of the punches 66 and 67 are identical in construction, except that preferably the working ends of the punches 66 are all suitably shaped to punch elongated perforations in the sheet, while the punches 67 are preferably formed to punch the perforations 33 square. In other respects, the punches may be identically similar in construction, and a detailed de scription of one will suiiice for all.

Each punch 66 is preferablyl generally cylindrical in form, being guided in holes 68 provided in a transverse guide-bar 69, and each punch is provided with a rectangular shank 70, working in a correspondingly shaped hole 71 provided in a guide.

plate 72. This guide-plate is suitably placed above the upper surface of the table 17 to permit the passage of the sheet therebetween. The punches 66 coperate with a suitable die-plate 73 having holes 74 corresponding in shape to the shanks to receive the latter. This die-plate may be set into a suitable recess 75 provided in the table 17, and the latter may. be provided with a transverse slot 76 having sufiicient clearance to allow the free escape of the material punched by the punches. It' desired, the guide-bar 69 and guide-plate 72 may be provided with a beveled recess 77, permittinginspection of each transverse set of perforations as thelatter appear to the view of the-operator just after being punched when the sheet has been fed one feed-step.

The punches 66 and 67 may be actuated by any suitable means, herein wipers 78 for the punches 66 and similar wipers 79 for the punches 67 mounted on a transverse pivot 8O and engaging said punches respectively, the latter belng for this purpose preferably provided with screws 81` and 82 respectively, threaded into the upper ends thereof. The heads of these screws also serve as abutments for. springs 83 and 84 respectively, encircling the punches 66 and 67, and bearing at their lower ends against the guide-bar 69.

The two wipers 79 receive their movement from suitable means, herein two series of pins 85 carried by a drum 86, the latter being provided for this purpose with two series of holes 87 to loosely receive these pins. The wipers 78 may be similarly actuated by pins 88, also carried by the drum 86, the latter for this purpose being provided with a plurality of series of holes 89 loosely receiving said pins.l The two series of pins 85 will always remain in their places in the drum 86, so that at all times in the operation of the machine the two punches 67 will serve to punch the two rows of perforations 33 adjacent the opposite edges of the sheet to provide for the feeding of the latter. The various pins 88, however, will be removed from their respective holes in the drum 86 from time to time, and will be variously arranged according to the requirements of the pattern which is to be perforated in the pattern sheet. Fory this purpose, the pins 88 as before stated are loosely held in the drum 86, so as to be capable of ready removal and 4re-arrangement at the will of the operator.

It must be evident, therefore, that provision must be made for the convenient insertion and removal of the pins, and their retention in the drum during the rotation of the latter. For this purpose, I preferably provide the drum 86 with' a cyllndrical casing 90 inclosing the drum and having in its upper side an aperture 91 permitting the removal and replacement of the pins when the latter are at the upper side of the drum. The internal diameter of this casing, however, 'is

' such that it engages the outer ends of the pins and holds the latter in place after the pins have passed beyond the aperture 91.

The casing 90 is provided on'its under side with an aperture 91X, to permit coperation of the wipers with the pins. The casing 90 is mounted upon and secured against rotation by two uprights 92 and 93 forming part of the frame 11. v

The drum 86 receives its rotative movement in any suitable manner, as by being secured to the shaft 43 hereinbefore referred to, the latter being j ournaled in the uprights 92 and 93 just described. This shaft may have secured thereto a `ratchet 94,'coperating with a pawl 95 pivoted on the pawl-carrier 39 hereinbefore described, and heldin operative engagementl with said ratchet by a suitable spring 96. When the piLWl-C'lscribed the pawl 95 acts through the ratchet a 94 and shaft 43- to impart an intermittent rotative movement to the drum 86. It will be observed that the pawl 38 hereinbefore described operates on the 11p-stroke of the pawl-carrier 39, while the pawl 95 operates on the down-stroke of the pawl-carrier, and hence'the feed-wheels 31y and the drum 86 are rotated alternately, the consequence being that the sheet will be held stationary while being punched, and will be fed forward a predetermined distance between each of they punching operations. As the drum 86 may have a tendency to over-travel, or in other words to continue to rotate after the feed-pawl 95 has started on its return movement, the drum may be provided with suitable means, herein a brake 97 surrounding the shaft 43, tending to resist turning movement of the latter. This brake may be held against rotation by. a stud 98, and may be provided with a split portion 99 and a screw 100, by means of which the brake may be contracted to increase its braking effect upon the shaft. If desired, the shaft 43 may be provided with a small hand wheel 101, by means of which the drum 86 may be manually rotated independently of the operation of its driving mechanism hereinbefore described.

By theperforating mechanism hereinbefore described, the sheet .may be punched according to any selected pattern and fed in a step-by-step movement as it is punched, the punching operations alternating with the intermittent feeding movements of the sheet. In some cases, it may be desirable 'to provide a guide 102 placed above the sheet to hold the ,latter infeeding engagement with the teeth 32 of the feed-wheels 31. This guide /fnay' be adjustably secured to the front Vpiece of the guide-bar 69 by screws 103 passing through vertical slots 104 provided in the guide 102r The sheet material as it is fed from a roll naturally tends to curl somewhatyand this tendency, especially with the tendency of the punches to exert an upward pull on the material when withdrawing therefrom, would naturally result in the sheet becoming disengaged from the feed-wheels. at times. Such disengagement, however, is efectually prevented by t-he guide 102, which insures a positive feeding engagement of the sheet with the feed-wheels.

In order to assist the operator in placing the pins in the drum according to the desired pattern, I preferably vemploy an index plate 105, bearing suitable `characters placed opposite corresponding circumferential rows of holes in the drum and corresponding to similar characters on the designers draft of the pattern, the latter being shown in Fig. 10, Herein the character at one end of the index plateis R, meaning Reed, and the character at the other end is W, meaning Warp, while ,the intervening characters are' the numerals 1 to 6 inclusive. By the use of this index, the Voperator is enabled to placeA a longitudinal series of pins in the drum in laccordance with dots or other symbols upon the designers draft or chart, indicating the positions for the placing of the pins.

It will be convenient to. provide some means to enable the operator to determine when a certain longitudinal row of pinsv placed in the drum, subsequently arrives after 180 degrees of rotation of the latter in position to punch that particular sequence of perforations in the sheet. To that end, therefore, I preferably employ two indicator disks 106 and 107secured to the shaft 43, at opposite ends respectively of the drum 86. These disks may be provided with suitable characters, herein a. series of numerals 1 to 12v inclusive on their peripheries, corresponding to the twelve longitudinal rows of holes in the drum. The numerals of one disk, however, will be placed six numbers apart from the numerals of the other,for in other words, the numeral 1 on one disk will be placed opposite the numeral 7 on the other disk, and the remaining numerals will be correspondingly placed.

'Suitable means may be provlded for enabling the operator to determine from the numerals on the disks the location of a certain longitudinal seriesof pins in the drum. F or this purpose, I preferably provide the casing 90 with a notch or aperture 108, through which the numerals of the disk 106 may be viewed oneby one, as they passsaid notch or aperture in rotation, and I provide a similar notch `or aperture 109, through which the numerals of the disk 107 may be viewed as they pass in rotation. I preferably associate with the notch 108 the word Set, and with the notch 109 the word Punch. These words may be placed adj acent their respective notches in any suitable manner, as by being stamped on the casing 90. It will be observed that the notches just described lare located a short distance at` one side of a .vertical plane containing the axis of the drum and therefore somewhat out of register with the numerals' on the disks. Hence just before a given set -of punches is actuated by the drumto' perforate the paper, the numeral designating that particular set of pins controlling said punches will appear 111 the notch or aperture 109 at the word Punch. It will now be evident that if the operator, referring to the word Set and the numeral appearing in the adjacent notch or aperture 106, sets a row or'fpins in the row of holes corresponding to said numeral, when eventually the rotation of the drum brings this set of pins into position t0' actuate the punches, the same .numeral designating that particular set of pins will appearv at the notch 109 adjacent the word Punch.

The general operation of the specific embodiment hereinbefore described is as follows The operator draws the free end of the sheet 16 from the roll 15 beneath the tension-bar 28 beneath the guide-plate 72 and guide 102 to a point adjacent the top of the feed rolls. In case the machine is to perforate in the sheet the holes for the feeding of the latter, it will be necessary to attach to the free end of the sheet a small piece of previously perforated sheet and place the perforations upon the teeth of the feed-wheels, so that the initial feeding of the sheet can be begun. The operator then, with the aid of the designers draft, beginning at the top of the lattervwith the symbols on the line AA, places in the drum a longitudinal series of pins corresponding to the symbols -R, 1 and W. When eventually the rotation of the drum brings this set of pins into coperation with the corresponding wipers to actuate the corresponding punches, the sheet will be punched with a corresponding series. of perforations along the line A-A (Fig. 9) of the sheet. At the same time, the two perforations 83 will be punched adjacent opposite edges respectively of the sheet for the feeding of the latter. The placing of the pins and the punching of the sheet now continues in an obvious manner, Athe operator referring to the designers draft and placing the pins in corresponding positions in the drum by the aid of the indexes, and after placing each set of pins, grasps the handle 50, giving the wheel 49 one complete rotation, thereby causing one row of perforations to be made in the sheet and the latter subsequently fed along into position to receive the next row of perforations. and so on.

In order to avoid the use of an extremely long pattern sheet, the width of the latter may be utilized to provide an entirely' sepa'- rate and distinct set of perforations placed between the perforations previously made, so that `when in the operation of the warp drawing machine the first set of perforation has completed its coperative action with the mechanism controlled thereby, the pattern sheet may be shifted into position' to bring the second set of perforations into position to coperate with the mechanism of the warp drawing machine controlled thereby.- For this purpose, the pattern sheet, after it has received one set of perforations as above described, may be shifted laterally into a new predetermined position differing from the first position by one-half the distance between the rows of the lirst ,set of perforations. This may be accomplished by 'removing the guide 18 from the groove 20,

BIS

perforating means to be arranged and re-arand setting the same into the groove 22, removing the guide 19 from the groove 21, and setting-the same into the groove 23, and setting the feed-Wheels 31 laterally a corresponding distance by shifting the shaft 34 as hereinbefore described by the aid of the in 58 and grooves 56 and 57. It will readily be seen that with the sheet thus positioned with respect to the perforating devices, the sheet will be perforated with an independent set of perforations, the latter being indicated in dotted lines in Fig. 9 for the purpose of distinguishing them from the perforations of the iirst set, which are shown in full lines.

While I have herein shown and described one form of my invention for illustrative purposes, and have disclosed and discussed in detail the construction and arrangement incidental to one specific embodiment thereof, it is to be understood that the invention is limited neither to the mere details or relative arrangement of parts, nor to its specic application herein-shown, but that extensive deviations from the illustrated form or embodiment of the invention may be made without departing from the principles thereof.

Having thus described one embodiment of my invention, what I claim is:

1. In a machine for perforating pattern sheets, the combination of means for feeding the sheet longitudinally; means comprising a series of members for perforatin-g a longitudinal succession of transverse series of holes of a certain predetermined arrangement in the sheet; and means permitting the ranged at the will of the operator, whereby the number and arrangement of the holes of eaflli transverse series may be selected at W1 2. In a machine for perforating pattern sheets, the combination of means for feeding the 'sheet'longitudinally; means comprising a l series of perforating members and actuators for perforating a longitudinal succession of transverse series of holesfof a certain predetermined arrangement in thev sheet; and means permitting said actuators -to be arranged and rearranged in various transverse arrangements manually at the will of the operator, whereby the number and arrangement of the holesv of each transverse series may be selected at will.

3. In a machine for perforating pattern sheets, the combination of means for perforating the sheet, means for feeding the sheet, and means for relatively positioning the perforating means and. feeding means in a plurality of positions transversely of the y sheet.

4. In a machine for perforating pattern sheets, the combination of means for perforating the. sheet, means for feeding the sheet, means for guiding the sheet, and

means for relatively positioning the perfor-v ating means, guiding means, and feeding means in a plurality of positions transversely of the sheet. f

5. In a machine for perforating pattern sheets, the ucombination of means for perforating` the sheet, means for feeding the sheet, and means for relatively positioning the perforating means and feeding means in a plurality of predetermined positions transversely of the sheet.

6. In a machine for perforating pattern sheets, the Icombination of means for perforating the sheet, means for feeding the sheet, means for guiding the sheet, and means for relatively positioning the perforating means, guiding means, and feeding means in a plurality of predetermined positions transversely of the sheet.

7. In a machine for perforating pattern sheets, the combination of means for perforating the sheet in longitudinal rows, means for feeding the sheet, and means for relatively positioning the perforating means and' feeding means in two predetermined positions transversely of the sheet, differing from each other by one-half the distance between the rows of perforations.

8. In a machine for perforatin pattern rating the sheets in longitudinal rows, means for feeding the sheet, means for guiding the sheet, and means for relatively positioningthe guiding means and perforating means in two predetermined positions transversely of the sheet, differing from each other by one-v forating means and feF ding means in a plurality of positions transversely of the sheet.

10. In a machine for perforating pattern sheets, the combination of means for perforating the sheet, means for 'feeding the sheet, a table across which the sheet is fed, and a pair of sheet edge guides, said table having provision to holdsaid guides in a plurality of predetermined positions transverselyy of the sheet. y

A sheets, the combination of means or perfo-.

11. In a machine for perforating pattern sheets, the combination of means for perforating the sheet, means for feeding the sheet, a table across which the sheet is fed, and a pair of sheet edge guides, said table being provided with two sets of longitudinal recesses to receive and hold said guides in position to guide the sheet.

, 12. In a machine for perforating pattern rating the sheet, rotary having a reduced sheets, the combination of means for perforating the sheet, rotary sheet feedingmeans including a shaft, and means' to position said shaft and feeding means in a plurality of positions transversely of the sheet.

13. In a machine for perforating pattern sheets, the combination of means for perfosheet feeding means including a shaft having means provided with a plurality of circumferential grooves, and a positioning element to coperate with one of s'aid grooves.

14. In a machine for perforating pattern sheets, the combination of means for perforating the sheet, rotary sheet feeding means inclu/ding Va shaft having means provided With a plurality of circumferential grooves, and a longitudinally slidable positioning pin normally entering one of said grooves.

15. In a machine for perforating pattern sheets, the combination of means for perforating the sheet, rotary sheet feedingmeans including a shaft having means provided With a plurality of circumferential grooves, and a longitudinally slidable positioningpin normally entering one of said grooves. and portion normally out of register with said shaft.

16. In a machine for perforating pattern sheets, the combination of means for feeding t-he sheet; sheet perforating means inv cluding a punch; a rotary drum; a pin inserted radially 1n drum for actuating said v sheets,

, punch; a movable Wiper interposed between saiddrum and said punch; and means to cause rotative movement of said drum and pin to act through said Wiper to actuate said punch.

17. In a machine for perforating pattern sheets, the combination of means for feeding the sheet, and sheet perforating means including a punch, a rotary drum, a pin loosely carried bysaid drum, and means normally to hold said pin in coperative engagement with said drum.- e

18. In a machine for perforati'g pattern the combination of means for feeding the sheet, and sheet perforating means including a punch, a rotary drum provided with a hole, a pin loosely mounted in said hole, and a guard normally to hold said pin in said hole. d

`19. In a machine` for perforating pattern sheets, they combination of means for feeding the sheet,jand sheet perforating means includingv 'a punch, a rotary drum provided With a hole, a pin loosely mounted in said hole, and a casing encircling said drum normally to hold said pin in said hole.

20. In a machine for perforating pattern sheets,the combination of means for feeding the sheet, and sheet perforating ymeans including a punch, a rotary drum provided with a hole, a pin loosely mounted in said punches,

hole, and a casing encircling said drum nor-v movement of said drum to actuate said punches.

22. In a machine for perforating pattern sheets, the combination of a plurality of punches, a drum provided with a plurality of circumferential series of holes, and a plurality of pins loosely carried in said holes for actuating ,said punches respectively.

v23. In a machinefor perfor-ating pattern sheets, the combination of a plurality of punches, a drum provided with a plurality of circumferential series of holes, a plurality of pins carried in said holes for actuating said punches respectively, and a casing inclosing said drum and normally holding said pins in said holes.

24. vIn a machine for perforating pattern sheets, the combination of a plurality of punches, a drum provided with a .plurality of circumferential series of holes, a plurality of pins carried in said holes for actuating said punches respectively, and a casing inclosing said drum and normally kholding said pins in said holes, said easing being provided with an aperture in its upper side.

25. In a machine for perforating pattern sheets, the combination of a plurality of punches, a drum provided with a plurality of holes, a plurality of pins carried by said holes for actuating said punches respectively, and an indexing device for said pins.

26. In a machine for perforating pattern sheets, the combination of a plurality ot' a drum provided with a plurality of circumferential series of holes, a plurality of pins carried in said holes for actuating said deXing device associated with said drum and pins.

27. In a machine for perforating pattern sheets, the combination of a plurality of punches, a drum provided with a plurality of circumferential series of holes. a plurality of pins carried in saidl holesfor actuating saidl punches, respectively, and an indexing device having symbols associated with said series of holes respectively.

28. In a machine for perfor-ating pattern sheets, the combination of a plurality of punches, a drum provided with a plurality of longitudinal series of holes, a plurality of ins carried in said holes for actuating sai punches, respectlvely, and an indexing device for said longitudinal seriesof holes.,

of pins carried in said holes for actuatingy said punches, respectively, and a, pair of index Wheels carried by said drum and provided, respectively, With series of symbols.

31. In a machine for perforating pattern sheets, the combination ofV a plurality of punches, a drum provided with a plurality of longitudinal series of holes, a plurality of pins carried in said holes for actuating said punches, respectively, anda pair of index wheels carried lby said drum and provided, respectively, with series of symbols, the symbols of one wheel corresponding in character to the symbols of the other but located in a different position circumferentially. 32. In a machine for punching pattern sheets, the combination of means for punching the sheet, means for holding a supply of sheet material, means for feeding the sheet from the supply to said punching means, sheet 'tensioning means interposed between said supply and said punching means, said sheet tensioning means including a friction bar adapted to rest on the sheet, and sheet guiding means including a plurality of guides held in place by said friction bar.

33.' In a machine for punching pattern sheets, the combination of means for punching the sheet, means for holding a supply of sheet material, means for feeding the sheet from the supply to said punching means, sheet tensioning means interposed between saidsupply and said punching means, said sheet tensioning means including a friction bar adapted to rest on the sheet, and sheet guiding means including a pair of guides provided With notches to receive said friction bar.

34. In a machine for punching pattern sheets, the combination of means for punching the sheet, means for holding a supply of sheet material, means for feeding the sheet from the supply. to said punching means, sheet tensioning means interposed between said -supply and said punching means, said sheet tensioning means including a friction. bar adapted to rest on the sheet, and sheet guiding means including a pair of guides, the friction surface of said bar being intermediate the top and bottom of said guides.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing Witnesses.

CHARLES LEA.

Witnesses:

E. EDNA SPRY, THoMAs B. BOOTH.

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