US885237A - Machine for cutting and punching sheet material. - Google Patents

Description

W122 n e55 es No. 385,237. PATBNTED APR.*-21, 1908.

v D. D. PROTHINGHAM.

MACHINE FOR CUTTING AND PUNOHING SHEET MATERIAL. I

- APPLIOA'HOR 2mm rx'n. 15,1901.

4 sums-sum 1.

Inv 611/20 7',

- n. 1), FROTHINGHAM.

PATENTED APR. 21, 1908.

MACHINE FOR CUTTING AND PUNOHING SHEET MATERIAL.

APPLICATION nun nus. 1a. 1901.

4 SHEETS-BHEET 2.

4 v I fnye7zior.' m'inessesl M f N ifxm 55 No. 885,237. PATENTED APR. 21, 1908.

D. D. PROTHINGHAM. v

MACHINE FOR CUTTING AND PUNGHING SHEET MATERIAL.

. APPLIOATIONI'ILBD FEB. 16, 1907.

4 SHEBTfl-SHEET 3.

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No; 885,237. PATENTED APR. 21, 1908. n. 1). FROT HAM.

MACHINE FOR TING AND HIN BET MATERIAL.

OATION 171 PLI LED FEB- 16. 7-

. 4 SHEETS-SHEET 4.

Witness 6,5.- [222/ en ior:

QLVQI UNITEDsTATEs DANIEL D. FROTHINGHAM, OF-SALEM, MASSACHUSETTS.

MA IILTE FOR CUTTING AND P'UNOHING SHEET MATERIAL.

Specification of Letters Patent.

Patented April 21, 1908.

Application filed. February 16, 1907. Serial No. 867,617.

To all whom it may concern: 4 Be it'known that I, DANIEL D. FROTHING- HAM, a citizen of the United States, residing at Salem, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in Machines for Cutting and Punching Sheet Material, of which the following is a specification.

This invention relates to a machine for d nking or cutting out articles of sheet material, such as leather, from pieces or scraps of such material.

The object of the invention isto provide a fmachlne in which pieces or scraps of leather or the like may be placed in a machine by the operator and pieces of such sheet material cut from said scraps and also punched, H desired, without danger of injury to the operator of the machine.

The object of the invention is further to provide a machine of the character set foi th In which the operator laces the scra of leather upon a cutting table and the mac ine then clamps said piece of scrap to the cuttin table, carries it to the die, or to the die an punch, as the case may be, where the piece of'material of the desired shape is cut or cut and punched and subsequently fed away from the die and unclamped or released from the clamping mechanism, when it is removed from the cutting table by the o erator, and placed in a convenient receptac e.

The invention consists in the combination and arrangement of parts set forth in the following specification and particularly pointed out in the claims thereof.

Referring to the drawings: Figure 1 is a side elevation of my improved machine for view of the cutting table and mechanism, partly broken away to save cutting and punching sheet material. Fig. 2 is a front elevation of the same, partly broken away to save space. Fig. 3 is a plan work-clamping space, with the stationary cam-shaft shown in section. 'Fig. 4 is a sectional elevation taken on line 414 of Fig. 2, the same being broken away. Fig. 5 is a plan view, partly "in section, takenon llne 5-5 of Fig.- 4 and broken away to save space. Fig. 6 IS a plan view, partly in section, taken on line 6-6 of Fig. 4, the same being broken away to save space. Fig. 7 is an enlarged section on line 44 of Fig. 2 of the punch and die, illustrating the same in the act of punching a piece of leather, :1 portion of the cutting table being to the upper face of said shown in connection therewith. Fig. 8 is an underneath plan of a die punches connected thereto. Fig. 9 is a plan view of a piece of leather cut and punched With the die illustrated in Fig. 8.

Like numerals refer to like parts through-- out the several views of the drawings.

In the drawings, 10 is the frame of the machine, '11 and 12 the driving pulleys, the pulley 11 being a loose ulley and-the pulley 12 rigidly fastened to tlib shaft 13, journaled to rotate in bearings in said frame 10. A in- 'ion gear 14'is fastened to the shaft 13 and meshes into a gear 15 fast to the shaft 16, also journaled to rotate in bearin s in the frame 10. The shaft 16 has a beve gear 17 fast thereto which meshes into a bevel gear 18 fast to a vertical shaft 19 joumaled to rotate in hearings in the frame 10 and in the base 20 to which said frame 10 is fastened.

The base 20 is supported upon legs or brackets 21 and beneath said-base are two with a plurality of Intermittent gears 22 and 23. The intermittent gear 22 is fastened to the shaft 19 and the intermittent gear 23 is fastened to a shaft 24 journaled to rotate in a bearing in the base 20. The shaft 24 has a cutting table 25 fast to the upper end. thereof and consisting of a disk 26 keyed tothe shaft 24 and having a plurality of concentrically arranged wooden cutting b ocks 27 fasteneddbjiI clamps 28, 28

A plate 29 is fastened to the disk 26 by screws 30. Said plate is concentric with the disk 26 and has pivoted thereon a plurality of clamp-levers 31. Each of the clamplevers 31 is pivoted at 32 to a forked bracket 33 which has a, stem 34 projectin downwardly therefrom and having screw-t eaded engagement with the plate 29. U on the under side of the outer free end of t e lever is preferably rovided a flat strip 35. A spring 36 hol s the outer end of the lever normally in contact with the up er face of the block 27. The inner end 0 the lever projects beneath a stationary camlate 37 which is fastened to a stationa s aft 38. The upper end of the shaft 38 is astened by a set-screw 39 to a bracket 40, which bracket is fastened to the frame 10. The'lowerend of the shaft 38 projects downwardly through the plate 29-and is concentric with the shaft 24. The disk 26 is supported upon its inner side, or the side adjacent to the frame, by a projection 41 upon said frame.

'tric rod 44 to a slide 45 adapted to slide in ways 46, 46 in the frame 10. A die 47 is fastened to the lower end of said slide by means of a plate 48. The die 47 is hollow at its lower end, thus providing cutting edges 49, and in the interior of said die is provided a resilient cushion 50, preferably formed of rubber. 51 are deta ably fastened to the die 47 by means of screw-threaded stems 52 thereon. A flange 53 upon the punch 51 limits the extent to which said punch can be screwed into the die 47, and also assists in su porting the same when it is cutting the leat er.

It will be seen that the punch 51 can be removed from the die 47 by unscrewing the stem 52ofrom said'die and that the space or opening 54 extending through said elastic cushion is of sufiicient size to enable the punch and the flange 53 to be withdrawn om the die without removing said cushion. An ejector '55 is provided-for each of the punches 51 said ejector consisting of a rod which extends upwardly through the die 47 and has screw-threaded en a cment with a cross-bar 56, said cross-bar eing fastened at the opposite ends thereof to the legs of the bracket 40. A set-nut 57 looks the'ejector 55 in position after the same has been screwed to the desired height in the cross-bar 56. When different size punches are used, difierent size ejectors may also be employed, or where the punches are placed at different distances apart, the ejectors are placed in alinement therewith, and in case of such variation of punches and ejectors the. crossbar 56 is changed to correspond therewith,

the same being readily detached from. the

bracket 40 by unscrewing the screws 58, 58 (Fi .5). It will be seen by reference to Fig. 5 t at the bracket 40 has two legs 59, 59, each provided with a foot 60 which is fastened to the frame 10 by means of cap screws 61, 61.

It is verydesirable in a machine of this class to have the cutting blocks 27 constructed to be readily attached to or detached from the table 26, and it is one of the objects of this invention to so construct said blocks and to so attach them to the table that they may be readily attached to or detached from said table when it is desired to renewor replace said blocks, and in order to secure this end grooves 69 and 70 are formed in the inner and outer faces, respectively, of said blocks. The bottoms of said grooves are inclined at an angle to the top of thetable 26, as illustrated in Fig. 4, andthe bottom faces of the clamp-plates, where they bear against the bottoms of said grooves, are also inclined at an angle to the top of the table. Furthermore, thebolts 71 which secure the outer A plurality of hollow punches 51,-

clamplates 28 t0 the table are inclined at anang e to the top of said table. The ends of the blocks 27, 27 abut a ainst each other and are cut at an angle so that said ends will lie in planes which radiate from the center of said cutting table, thus preventin said blocks from moving in the direction of their length. I

In removing the blocks from the cutting table the nuts upon the bolts 71 are removed and the clamplates 28 can then be immediately remove from the cutting table, and the blocks can then be'taken off and renewed or replaced, as may be desired. When the reverse operation is erformed, that is, when the blocks are to be astened to the table 26',

said blocks are placed u on the table, as illustrated in Fig. 3, with t ieir ends abutting against each other and with the clamp-plates 28 projecting into the grooves 69. The clamp-plates 28 projecting into the grooves 70 are then tightened by means of the bolts 71 and their respective nuts, and as said -1cla mp;plates stand at an angle to the upper surface of, the table and said bolts are located at an angle to said upper surface, when the nuts upon the bolts 71 are tightened, the clam -plates 28 force the blocks 27 inward y toward the center of the table and against the clam -plates 28 and also force the ends of said blocks against each other, thus firmly locking the blocks to the table, the clamps 28 bein secured to the table by screws 71. The w iole operation of removing a block and inserting a new one is very much shortened by the means described.

Having thus specifically described my improved machine for dinking or cutting pieces of leather from scraps of the same, 1

will now proceed to describe the general operation-of the same. The 0 erator stands or is seated in front of the mac ine, or at the right of the same, as viewed in Fig. 1. At this point the clamp levers 31 are raised, as seen in Figs. 1 and 4, so that the operator can place portions of scrap material beneath the outer ends of the levers.v Assuming the machine to be in operation, the belt being on the tight pulley 12, the pinion 14 rotates the gear 15, thus rotating the shaft 16 and the bevel gears 17 and 18 impart a rotary motion to the shaft 19 which rotates the 1ntermittent pinion gear 22, thus imparting an intermittent rotary motion, tothe car 23, to the shaft 24, and to the cut-ting ta le 25, as well as to the plate 29 and-the levers 31 pivoted thereon. Said shaft 16 also imparts a vertical reci rocatory. motion to the slide 45 through t e eccentric 42, eccentric straps 43 and connecting rod 44, thus moving the die 47 downwardly and upwardly, together with the punches 51, 51 attached to said die. As the cutting table is, therefore, fed step by step in the direction of the arrow, (Fig. 3),

- the pieces of scrap 62 are brought one by one of said die'causes said punches, they pass through the eather and cut the same against the upper face of 1 27, as shown in'Fig. 7.

the segment block The resilient cushion yields at this time and the leather piece 63, which is cut from the scrap 62, passes upwardly into the hollow die 47, a portion 64 of said scrap 62 passing upwardly mto the interior of the As the die and punch retreat, the cushion 50 expands and pushes the piece of material 63, cut from the scrap 62, downwardly onto the block 27, while a continued upward motion the stationary ejector 55.

' to push the portion 64 out of the interior of the punch.

It will be seen by reference to Fig. 3 that the cam plate 37 is cutout or recessed at 65 for a portion of the Way therearound, so that I when the levers 31 arrive at this cut-out portion, the s rings ull the outer ends thereof downward yand c 27. After the leather has been cut, however,

and the cutting table starts to move in thedirection of thearrow (Fig. 3) the inner end of the lever encpunters an incline 66 formed upon the under side of 'saidcam plate 37 and is tipped downwardly at its inner end so as to release the iece of material in order that the same may e removed from the table by the operator as it ap roaches her during the continued rotation o the table.

Having thus described my invention, what I claim and desire by Letters Patent to secure 1s:

1.- In a machine for cutting and punching sheet material, a die, mechamsmtoimpart a reciprocatory motion thereto, a cuttlng table, mechanism to impart an intermittent.

rotary motion to said cutting table, a series of levers pivoted to said table adapted to hold a iece of sheet material in contact with said ta le, and meansto rock said levers to release said sheet material. I 2. In a machine "for cutting and punching sheet material, a die, mechamsm to impart a reciprocatory motion thereto, a cutting table, mechanism to impart an intermittent rotary motionto said cutting table, a series of levers pivoted to said table adapted to hold a iece of sheet material in contact with sai table, and astationary cam ada ted to engage said levers during the rotatlon of said table and to operate them'to alter nately clamp and release said sheet material to and from said table, respectively.

3. In a machine for cutting and punching sheet material, a cutting table, mechanism to impart an intermittent rotary motion thereto, said table consisting of a disk with a plurality of concentrically arran ed wooden cutting 'blocksfast thereto, a p ate fast to said disk and concentric therewith, a plurahty of levers pivotally supported on said with punch 51.

rial, a hollow die having amp the scrap to the blocks.

sheet and release said sheet material plate, a vertical stationary shaft concentric with said plate, the lower end of said shaft pro ecting into said plate, and a cam fast to respectively.

4. In a machine for cutting sheet material, a die, a hollow unch inclosed within said die, aresilient cushion extending around the inner edge of saiddie, and a stationary ejector extending through said punch.

In-a machine for cutting sheet matea cutting edge a resilient' cushion extending around the interior of said die adjacent to said cutting edge, and-a stationary ejector extending through said die. i

.61 In amachine for cutting sheet material, a hollow die, ahollow punch inclosed within saiddie and fast thereto, a resilient cushion extending around the interior of said die adjacent to its cutting edge, a stationary ejector projecting downwardly into said punch, a cutting table, and mechanism to impart a reciprocatory motion to said die. 7. In a machine for cutting sheet material, a hollow die, a hollow punch inclosed within said die and detachably fastened thereto, a resilient cushion extending around the interior of said die adjacent to its cutting edge, said cushion having an opening extending therethrou h to receive said unch,

and ,a stationary e ector extending t rough said unch. I 8. n a machine for cutting and punching material, a cutting table, mechanism to impart an intermittent rotary motion thereto, said table consisting of a disk with a plurality of concentrically arranged wooden cutting blocks fast thereto, a p ate fast to said disk and concentric therewith, a plurality of levers ivotally supported on saidplate, a vertical shaft concentric with said plate, the lower end of said shaft projecting 1nto said plate, a stationary bracket-to which the u per end of said shaft is fastened, and a cam ast tosaid shaft and adapted to enga e said levers during the-rotation of said tab e and to operate them to alternately clamp to and from said blocks, respectively, in combination with a hollow die, a hollow punch inclosed within said die and fast thereto, a resilient cushion extending around the interior of said die to its, cutting edge, a stationary ejector projecting downwardly into said punch, a cutting table, and mechanism to mpart a reclprocatory motion to said die. 9 In a machine for cutting sheet material, a die, mechanism to impart a reciprocatory motion thereto, a stationary ejector extending through said die, a cutting table, an intermittent gear fast to said table, and a second intermittent gear adapted to intermitltently rotate said first named gear and tab e.

'10. In a machine for cutting and punching sheet material, a cutting table, a plurality of wooden cutting blocks arranged concentrically upon said cutting table, each of said cutting blocks being provided with grooves in opposite faces thereof, and clam plates fast to said cutting table and projecting into' sheet material, a cutting table, a plurality of 1 wooden cutting blocks arranged concentrically upon said cutting table, each of said outting blocks being provided with grooves in opposite faces thereof, the bottoms of the outer set of said grooves inclined at an angle toward the top ofsaid table, and clamp-plates fast to said table and projectin into said outer set of grooves, whereby sai blocks are clamped to said table.

13. In a machine for cutting and punching sheet material, a cutting table, a plurality of wooden cutting blocks arranged c0ncentric ally upon said cutting table, each of said cutting block's being provided with grooves in opposite faces thereof, and clamp-plates fast to said cutting table and projecting into said grooves, whereby the under face of one of said clamp-plates is inclined at an angle to the to of said table.

14. n a machine for cutting and punching sheet material, a die, mechanismto impart a reeiprocatory motion thereto, a rotar cutting table, and means to hold a piece of sheet material in contact with said table by spring tension.

15 In a machine for cutting and punching sheet material, a die, mechanism to impart a reci rocatory motion thereto, a rotary cutting tabl e, and means to hold a iece of sheet material in contact with sai table by spring tension. 4

16. In a machine for cutting and punching sheet material, a die, mechamsm to impart a reeiprocatory motion thereto, a cutting table,,a series of levers pivoted to said table adapted to hold a piece of sheet material in contact with said table, springs adapted to normally cause said levers to press said material against said table, and means to rock said levers to overcome the tension of said springs to release said sheet material.

17. In a machine for cutting and punching sheet material, a die, mechanism to impart a reeiprocatory motion thereto, a cutting table, mechanism to impart an intermittent rotary motion to said cutting table, a series of lovers pivoted to said table adapted to hold a piece of sheet material in contact with said table, springs adapted to normally cause said levers to press said material against said table, and a stationary cam ada ted to engage said levers during a part of the rotation of said table to overcome the tension of said springs to release said sheet material from said table.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit- IIBSSBS.

DANIEL n. FROTHINGHAM.

Witnesses:

LOUIS A. JoNEs, CHARLES S. ,GoomNe.

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