US1120881A

US1120881A - Perforating-machine.

Info

Publication number: US1120881A
Authority: US
Inventors: Alexander M Alexander
Original assignee: United Shoe Machinery Co AB
Current assignee: USM Ltd; United Shoe Machinery Co AB
Priority date: 1911-04-22
Filing date: 1911-04-22
Publication date: 1914-12-15
Anticipated expiration: 1931-12-15

Description

A. M. ALEXANDER.

PERFORMING MAGHINE. APPLICATION FILED 11 11.22, 1911.

1 ,120,881 Patented Dec. 15, 1914.

4 SHEBTSSHEET 1.

//V VENTUR.

M//77VESS5.

THE NORRIS PETERS 00.. Fmm-LlTl-la. WASHINGTON, D. c.

A. M. ALEXANDER.

PERFORATING MACHINE.

APPLICATION FILED APR. 22, 1911.

Patented Dec. 15, 1914.

4 SHEETS-SHEET 2.

"'HE NORRIS PETERS CO PHOmLlTHO WASHINGTUN, D. l

A. M. ALEXANDER.

'PERFORATING MACHINE.

' APPLICATION FILED APR.22, 1911.

Patented Dec. 15, 1914.

4 SHEETSS HEET 3.

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WTAESSE:

A. M. ALEXANDER.

PERFORATING MACHINE.

APPLICATION FILED 11.22, 1911.

1 1 20,88 1 Patented Dec. 15, 1914.

WT/VESSES //\/l/E/\/ 27/3 Flynt, No. 941,704.

UNITED STATES PATENT OFFICE. ALEXANDER M. ALEXANDER, OF BEVERLY, MASSACHUSETTS, ASSIGNOR TO U 'NITED SHOE MACHINERY COMPANY, OF PATERSON', NEW JERSEY, A CORPORATION NEW JERSEY.

Application filed April 22,

To all whom it may concern:

Be it known that I, .ALEXANDERM. ALEX-l ANDER, a citizen of the United States, resid-i ing at Beverly,.in the county of Essex and State of Massachusetts, have invented certain Improvements in Perforating Machines, of which the following description, in connection with the accompanying draw-f g ings, is a specification, like reference characters on the drawings indicating like parts? in the several figures. t

This invention relates to punching-machines for producing ornamental perforations in stock such, for example, as quarters Q and other parts of boots and shoes, and is; concerned more particularly with certaini improvements upon machines of the type ofl that shown and described in the patent tol u v .I In the machine shown in the patent means,

are provided for insuring that the spaces. be-' line are uniform with those between perforations extending in a straight line, and this result is brought about by providing a punch feed of a certain type. It often happens, however, that the stock to be ornamented in a given factory consists in whole or in a considerable part of pieces having comparatively straight edges. Under such circumstances, owing to the fact that a punch feed is ordinarily a comparatively slow feed, it is desirable that means be provided for changing from the punch feed to a faster moving feed.

Accordingly one feature of the present invention consists in the provision in a ma chine of the class described of means for causing the punch to feed the stock, means for feeding the stock independently of the punch and means under control of the operator for rendering a selected one of the feeding means operative. And preferably the punch-feed mechanism is actuated directly from the main driving shaft, the independent feed mechanism from a counter-shaft, and means are provided under the control of the operator for connecting the main shaft with the counter-shaft.

WVhen the punch feed is being used a stripper is employed which engages the stock in the line of the perforations while the punch is being withdrawn from the stock and is intermittently raised and Withdrawn from the path of lateral movement of PERFORATING-MACI-HNE.

Specification of Letters Patent. I Patented De 15 1914 1911. Serial No. 622,688.

the punch to permit the punchto swing past 1t; and v for the, production of uniformly of the work-is curved, it is desirable, that the stripper engage the stock at a point midway between the extreme lateral positions which the punch occupies during the feed- I ing operations.

i To this" end ,anothersfeature of the inventlon consists in the provision with a machine \I of the class described having a punch movable longitudinally to perforate the stock and laterally to feed it, and a stripper actuated to; engage the stock intermittently,fof means for adjusting the stripper longitudinally of the line ofperforations. c l

WVith this construction and arrangement of parts; it is possible to cause the stripper to engage the stock at a point exactly midway between the extreme positions occupied by the punch during the feeding movement irrespective of the extent of such movement. And it is also possible, in caseit' is desirable, to causethe stripper to engage the stock at a point distanta given distance, from the middle'point referred to above.

Intproducing a line of perforations in the ,margin of a piece of stock having a curved edge it is possible, if the operator is sulfioiently skilled, to place the line parallel to spaced perforations, particularly if the edge the edge of the stock. In order,-however, I

wardly in a straight path will bearfagainst the curved edge of the stock and force the stock to turn about the point engaged by the stripper. s I I These and other features of the invention including certain details of construction and combinations of parts will be set forth. in connection with the accompanying drawings and= will be pointed, out in the appended claims.

Referring now to the accompanying drawings, Figure 1 is a side elevation of the machine in which the present inventlon 1s embodled; Fig. 2 1s a front elevation; Flg. 3 1S a perspective of the forward portion of the machine; Fig. 4 is a cross section of the upper portion of the punch bar and punch bar carrier; Fig.5 is a perspective showingthe stripper and its actuating mechanism; Fig. 6 is a perspective showing the independent means for feeding the stock; and Fig. 7 is a perspective showing the guide for use with work having curved edges. I

Rotatably mounted in brackets in the frame 1 is a driving shaft 3 upon which is mounted a driving pulley adapted to be continuously rotated from any suitable source of power; and this pulley is arranged to rotate the shaft through a suitable clutch which may be thrown into actuation-by depressing a link 7 normally held in the position shown in Fig. 1 by the spring 9. I The details of the clutch mechanism form no part of the present invention and will not be further described. The shaft 3' has fast upon it four

cams

11, 13, 111 and and an eccentric 17. As will be presentlydescribed the cam 13 serves to reciprocate the punch; the

cams

11 and 111 move the punch laterally to feed the stock; the cam 15 operates the stripper, and the eccentric 17 operates the counter-shaft which in turn drives the independent feed mechanism.

The punch bar carrier 19 is fast to a slide 2lwhich is movable horizontally in a dovetailed guideway as best shown in Figs. 2 and 3, a spring 23 being provided which normally holds the punch bar carrier in the extreme right hand position as viewed in Fig. 2. In order to move the punch bar carrier in opposition to the spring, a lever 25 is pivoted to said carrier at 27 and carries at its upper ends two cam rolls 29 and 291 which cotiperate with the

cams

11 and 111, said cams being of identical outline. In order to hold the lever 25 in operative position as well as to vary the efiective throw of said lever, when desired, a fulcrum-roller 31 (see Fig. 3) is carried by a bracket 33 the stem of which is slidably mounted in a slot 35 cut through a hinged plate 37, said plate beingmounted to swing about an axis passing through the center of the screw 39. A thumbscrew 41 (see Figs. 1 and-2) is arranged to clamp the bracket 33 in adjusted position, and a hookedbolt 43 extending through the hinged member or door 37 is provided for locking the door in closed position, the hook engaging a cylindrical stud on the frame (not shown) and the outer end of the bolt being threaded to receive a thumbnut 45. With this construction it is possible by varying the position of the roller 31, which serves as a fulcrum, to vary the effective throw of the lever 25 and thus the:extent of lateral movement imparted tothe punch. It should be noted thatby dropping the bracket 33 to its lowermost position the fulcrum 31 will cease to be operative, and no lateral movement whatever will be imparted to the punch. By making the part 37in the form of a swinging plate or door instead-of an integral part of the frame easy access to the punch carrier and 1ts associated mechanism is made possible, it being evicylindrical bore in which is slidably mounted the punch bar. Referring more particularly to Fig. 4, this bar comprises two

sections

47 and 49. The section 47 is normally held in raised position by a spring 48, the lower end of which rests upon a shoulder in the lower portion of the bore in the punch bar carrier. The upper section 49 of the punch bar is provided withahollow extension 56 which fits loosely upon the upper end of the section 47, and in this extension is an abutment block 51 mounted upon an eccentric 53, which is fast to a stud 55, said stud being supported in bearings in the extension 56.

On the end of the stud 55 is fastened an adjusting lever 57 (see Figs. 2 and 3) which may be held in adjusted position by means of a clamp 59 (see Fig. 1) provided with a locking nut 61, said clamp cooperating with a plate 63 carried by a bracket on the hollow extension 56. The purpose of this construction is to vary the lowermost position which the punch occupies during the operation of the machine. By turning the lever 57 and thereby the eccentric 53, the abutment block 51 may be raised or lowered with respect to the upper section 49 of the punch bar. It will thus be apparent that the effective length of the punchbar may be increased or diminished as desired.

In order to hold the stock down upon the bed 65 while the punch 67 is being withdrawn a stripper 69 is provided. This stripper (see Fig. is carried by a stem 71 slidably mounted in a socket or holder 73 and normally held in the position shown by a spring 75 which encircles a reduced portion of the stem 71 and abuts with one end a shoulder on said stem and with the other .end the base of a hollow nut'threadedinto the socket and provided with a knurled head .77. The socket 73 is provided at its lower portion with an eye through which passes a rock-shaft 85, said rock-shaft being provided with a groove (not shown) to receive the end of the screw 7 6, so that longitudinal movement of the rock-shaft 85 and that it should be out of contact with the work during the time that the punch is feeding the stock forward. In order to accomplish this movement a toe 83 is caused to cooperate witlrthe pin 79. This toe is fastened to the rock-shaft 85 by apin 87' so that, whenthe shaft is rocked, the pin 79 and with it the stripper 69 is intermittently lifted against the force of the spring 75. In order to permit the shaft to.be

rocked and at the same time to permit saidshaft to be moved longitudinally, the end of the said shaft is split as shown at 8.9 to

receive apin ,(not shown) which passes through said slot and through acrank 91.

This crank is integral with a sleeve 92' (see Fig. 2) which is held in fixed longitudinal position by means of a finger 9 l and through which the rock-shaft is slidable. The crank 91 is connected by a link 93 with a bell-crank lever 95 pivoted at 97 to the frame of the machine, and this bellcrank lever carries at its upper end a roll. 99

which cooperateswith the cam 15 on the main driving shaft 3. As the cam is rotated the shaft 85 is rocked, and the stripper 69 is intermittently raised from the stock by the toe 83 and forced down upon it by the spring 75.

1n order to raise the stripper when de-.

sired as, for example, when a piece of work is to be introduced into the machine, a second bell-crank lever 101, pivoted to the frame at 103 and normally held in inoperative position by a spring 105, is attached to a chain 107 which passes over a pulley 109 and is connected with a suitable treadle (not shown). It is sometimes desirable to adjust the stripper withrespect to the punch in the direction of the lateral movement of the punch, and in order to provide for such adjustment the socket 73 is provided with a second eye 113 through the bore of which is threaded an adjusting screw 115 which is rotatably mountedin the frame of the machine but is held from longitudinal movement-with respect thereto. By turning the screw 115 in one direction or the other.

it is possible to adjust the stripper in the direction of the lateral movement of the punch and thereby to locate the stripper at Y the exact center of the path described by In order to guide the edge of the work, an edge gage 117 is provided. This gage may be of any approved form; and of the one shown itwill be suflicient to say that an uprightstud. 119 integral with it is angularly movable in a socket 121 which in turn may be clamped to a bracket 123 by turning a thumb nut 125, the turning of said nutserving also to tighten the bracket 123 upon the rod 127 upon which it is slidable. It will thus be seen that by loosening a single screw the gage 117 may be adjusted forward and back upon the rod,

127 as well as angularly-about the axis of the stud 119.

It often happens that the, edge of the work-to be perforated is curved; and, in" order to cause the line of perforations to be located automatically at a uniformdistance from the edge, a guide for curved. work (best shown in Fig. 7) is provided,-it being understood that this guide is to be substituted for the gage 117 when thechar-' Y acter of the work is suitable. This guide is arranged to be reciprocated, and in the illustrative machine is shown as fast to the punch bar carrier; but it should. be under stood that said guide may be mounted upon any suitable part. Referring tothis figure, the guide 129 is provided with a horizontal arm131 which is held in a bracket 133 by means of a set-screw 135, and this bracket is provided with slides 137 which are re-" ceived in guideways 139 formed in a'collar 14-1, said collar being clamped about the punch bar carrier 19 by means of a binding screw 148.

Fixedly held by the punch bar carrier 19 is a screw threaded rod adapted to receive a thumb nut 1&7 the shank of which is held by an upstanding yoke 1&9 of the I bracket 133. Manipulation of the thumb nut 1et7thus serves to adjust the guide 129- toward and from the punch in the direction of the lateral movement of the punch.

The operative portion of the guide itself comprises a supporting member 151-arrangedito underlie the stock and a presser I foot 153 pivoted to the guide at155, said presser foot being normally held downwardly by a spring 157",the extent of the downward movement being limited by a setscrew The operation of this device is as follows: After the punchhas been raised from the stock and occupies the position shown in Fig. 7 the next movement of the punch is to the right as viewed in' that figure. During this movement the stripper 69 remains in engagementwith the stock, and

the guide 129 swings backwardly or to the right with the punch. In case theedge of the work is straight, it is evident that the angular position of the work will not be afiected, but if the work is curved the guide &

on its backward movement engages the curved edge of the work and swings the work about the point engaged by the stripper 69. The position of the punch and of the guide at the end of their backward movement are shown in dotted lines in Fig. 7. In this figure the original position of the work is shown in full lines and the position to which the work is turned by the operation of the machine described above is shown in dash lines; and it will be noted .that the extent to which the stock is turned is directly dependent upon the radius of the curvature of the edge of the work.

As has been stated, one of the principal objects of the present invention is to provide a machine in which the stock may be fed by the punch or by an independent feed mechanism according to the nature of the work which is to be operated upon. Any

- suitable sort of independent feed mechanism may be employed.

Referring now more particularly to Fig. 6, a feed plate 161 having one end held in engagement with a cam 163 by a spring 165 is provided atits opposite end with a perforation through which passes an actuating rod 167 which is adapted to swing about a pivot screw 169. The actuating rod 167 is formed with a lug 175 which acts as a fulcrum the position of which, as will presently appear, determines the extent of throw of the feed plate 161. In order to adjust the positionof this fulcrum, the pivot 169 is carried by a bracket on a slide bar 177 which slides through the arms of a yoke 179; and this slide bar maybe moved l0ngitudinally by means of an adjusting screw 181 provided with a knurled head 183 and a look nut 185. The actuating rod 167 is moved angularly in one direction by a spring 187 which has one end fastened to an upright post 189. To move the actuating rod in the other direction a link 191 has at one end a pin-and-slot connection with the upright post 189 and at the other end is pivoted at 193 to a second link 195. This latter link carries at its end a roll 197 which is held against a cam 199 on the counter-shaft 201 by means of a spring 203. The shaft 201 extends into a socket in the shaft 205, and the two shafts are connected by means of a clutch collar 207 keyed to the shaft 201 and provided with a projecting lug 209 which is received in a .socket formed on the shaft 205. A lever 211 pivoted at 213 to a fixed support carin which it appears.

17 on the main driving shaft by an eccentric rod 218 provided at its lower end with a pin which coiiperates with a slotted crank 217 fast to the end of the shaft 205. It will be clear that when the shaft 201 is rotated the cam 199 through the roller 197 and

links

195, 191 will impart movement to the actuating rod 167 in one direction while the spring 187 will move said rod in the reverse direction. The purpose of the cam 163 and the spring 165 is to raise and lower the feed plate 161 at the proper points in its path. 1

In order to hold the work down upon the toothed portion of the feed plate 161 when the feed mechanism described above is being used a presser foot in the form of a conical presser roll 219 is rotatably mounted on an inclined stud 221 which is held by a setscrew 223 in a block 225. This block is fast to astem 227 which is slidably mounted on anyupright bearing 229 and is urged downwardly by a spring, not shown, whichcontacts at one end with the shoulder on the stem and at the other with the base of a counter-bore in the bearing. The stem is provided with a .pin 231 (see Fig. 2) and the bearing with a slot 233 to form a bayonet -joint .so that when the presser roll is not in useit may be held out of the way in raised position as shown in all the figures The bearing 229 is clamped in a yoke on a collar 235 by means of a screw 237, said collar in turn being held in place by means of a set-screw 239.

As illustrated in Figs. 1, 2 and 3, the punch feed mechanism is arranged to be operative; and as the shaft 3 is rotated the cam 13 and. the spring 48 serve to reciprocate the punch bar while the

cams

11, 111

and the spring 23 serve to move it laterally.

4 thereby raising the stripper 69; the presser roll 219 is given a quarter-turn whereupon the catch-pin 231 is free to move down in the slot 233, and the roll 219 is pressed upon the work table; and the lever 211 is moved to connect the counter-shaft 201 with the main driving shaft.

Havingthus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is l. A machine of the class described having, in combination, means for causing the punch to feed the stock, means for feeding the stock independentlyof the punch, and means under control of the operator for rendering either one of the feeding means operative or inoperative independently of the other.

2. A machine of the class described having, in combination, a punch, means for forcing said punch into the stock, means for causing the punch to feed the stock, mechanism for feeding the stock independently of the punch, means under control of the operator for rendering said independent feed mechanism operative and means for rendering the punch feeding means inoperative. y

3. A machine of the class described having a punch, means for forcing said punch into the stock, means for moving the punch laterally to feed the stock, in combination with means for feeding the stock independentlvof the punch, and means under control of the operator for rendering the laterally moving means inoperative.

4. A machine of the class ing, in combination, a punch, a driving shaft, means cooperating with said shaft to move said punch longitudinally to punch the stock and laterally to feed the stock, a counter-shaft, independent feed mechanism adapted to be actuated thereby means under control of the operator for connecting said counter-shaft with said driving shaft and for disconnecting it therefrom.

5. A machine of the class described having, in combination, a punch, means-for forcing said punch into the stock, means for moving the punch laterally to feed the stock, a stripper for engaging the stock at a point approximately in the path of lateral movement of the punch, means for actuating said stripper intermittently and means for adjusting said stripper in a direction parallel to that of the lateral movement of said punch.

6. A machine of the class described having, in combination, a punch, means for forcing said punch into the stock, means for moving the punch laterally to feed the stock, a stripper for engaging the stock, a

spring tending to move said stripper into engagement with the stock, a cam engaging said stripper intermittently to lift it, and means for locking said stripper in inoperative position. I

7. A machine of the class described having, in combination, a punch, means for forcing said punch into the stock, means for moving the punch laterally to feed the stock, a stripper for engaging the stock, a holder in which said stripper is mounted, a spring tending to move said stripper with respect to said holder, a rock-shaft slidable in hearings in the frame of the machine, said shaft being angularly movable with respect to said holder but being held from longitudinal movement with respectthereto, and means for adjusting said holder and shaft longitudinally of said shaft.

8. In a machine for perforating a piece of stock having a curved edge, means for engaging said piece at a predetermined describe d hZLV-.

point, means for automatically turning said piece about said point, and means for vary:

ing the location of said'point and thereby the extent to which said pie e is turned.

9. A machine for producing a line of perforations in a piece of stock having, in combination, a punch, means for forcing said punch into the stock, and means for feeding the stock, said means including an edge guide, means for moving said guide along the edge of the work and means for aol ustmg said gu de 1n lnie wlth the edge of the stock.

10, A machine for producing a line of perforations in a piece of stock having, in combination, a I punch, means for forcing said punch into the stock, and means'for feeding the stock, said means including an edge guide, means for moving said guide along the edge .ofthe work and means for ad usting said guide transversely to the edge of the stock.

11. A machine for producing a line of perforations in a piece of stock having, in compunch laterally to feed the stock, a stripper for engaging the stock during the rearward movement of the punch, and an edge guide movable with the punch and adapted to engage a curved edge of the stock to swing said stock about the point engaged by the stripper.

13. A machine of the class described having, in combination, .a punch, means for reciprocating said punch longitudinally to force it into the stock, means for moving said punch laterally to feed the stock, and a plate hinged to the frame of the machine and adapted to be swung outwardly to give access to the punch.

14. A machine of the class described having, in combination, a punch bar, means for reciprocating said bar, a carrier in which said bar is mounted, means including a lever and a fulcrum forv moving said carrier laterally, a plate by which said fulcrum is carried, said plate being pivoted to the frame of the machine, and means for locking said plate in closed position.

15. A machine of the class described having, in combination, a punch, a bar by which said punch is carried, said bar comprising an upper and a lower section, a spring for sustaining the lower section, the upper sec tion being in the form of a cap, a block slidably mounted in said cap, meansfor adjusting said block with respect to said cap, and means for depressing said cap and thereby said punch.

16. A machine of the class described having a punch and means for causing said punch to travel in a rectangular path in combination with a stripper for engaging the stock at a point approximately in the path of the punch and means for .movi said stripper intermittently Out of the path of the punch.

17. A machine of the class described having a punch bar, a punch carried thereby and means for reciprocating said lpunch bar in combination with a bar carrier having a slide, a guide for snstaining said slide,flaspring for moving said carrier laterally one" direction a'n dhpositive means nts; ,9 $1 1 ent new be pb e pd r for moving said carrier in the opposite .di- 2 ,reotion.

ALEXANDER M. ALEXANDER. Witnesses Cnn srnn E. Rooms, LAURA GO DRID E.