US1277469A - Punching-machine. - Google Patents

Description

P. e. PATER. PUNCHING MACHINE.

APPLICATION FILED FEB. 8| l9l8- Patenfed Sept. -3, 1918 m'r'm n Pau/ 6 P6779 Witnesses: Inventor M w. s

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P. G. PATER.

' PUNCHING MACHINE.

APPLICATION FILED FEB. 8. I918 Patented ept. 3, 1918.

2 SHEETS-SHEET 2' Paw/6 Para" Inventor l/U. S &&

Attorney I Witness:

flaw-M PAUL 1G. PATER, OF HAMILTON,,OHIO, ASSIG'N'OR TO THE LONG & ALLSTATTER COM- 4 PANY, 0F HAMILTON, OHIO.

PUNCHING-MACHINE.

To all whom it may concern:

Be it known that I, PAUL G. PATER, a citizen of the United States, residing at Hamilton, Butler county, Ohio, have invented certain new and useful Improvements in Punching-Machines, of which the following is a specification.

This invention aims at mechanism designed to facilitate the accuracy of punching operations and will be readily understood from the'following description taken in connection with the accompanying drawings in which j l Figure 1 is a side elevation of a punching machine fitted with an exemplifioation of my invention;- 1 j Fig. 2a verticalsection of portions thereof in the plane of line a of Figs. 3 and 4;

Fig. 3 a front elevation of the punch and its near accessories; and

Fig. 41 a horizontal section in the plane of offset lines 6 ofFigs. 2and 3. l

In the drawings j 1, indicates the body of the punching machine; I

2, the vertically reciprocating ram thereof:

3, the camshaft. for reciprocating the ram: v

4, the punch:

.5,the die: '6, the stripper:

7, a faceplate on the body, forming the front guide-surface of the ra n:

' 8, the plate to bepunched: ,31

I 9, prick-punch marks in the plate at the centersofl-ocation of the holes to be punched in the plate:

10, a teaton the end of the punch, all of the parts thus far referred to being constructed substantially as usual, except as hereinafter stated, and subject to any of the usual modifications: r

11, a recess near the base of the ram: 12, the punch-stock carrying the punch at its lower end and held in the base of the ram:

13, a collar on the upper end of thestock, the height of the collar and the height of the recess 11 beingrelatively such that the stock may have some degree of free reciprocating motion in the ram:

14, a block secured in the base of the ram, a semi-circular recess in the rear face of this block and a semi-circular recess in the front portion of the base of the ram to the I Specification of Letters Patent.

Patented Sept. 3, 1918.

Application filed February 8, 1918. Serial No. 215,946.

rear of the block forming a bore in which the punch-stock fits and: slides:

1d, stud projecting downward from the block:

15, a fork projecting from the punch-stock and freely straddling the stud:

16, an adjusting nut 011 the stud, below the fork: V l 17, the bolts for securing the block to the base of the ram, this block and bolt arrangement being designed to furnish a convenience in assembling the punch-stock and ram:

18, a pair of jaws pivoted to the top of the block and projecting into the recess in the ram and adapted for such opening and closinginotion as will adapt them to be free from the collar 13 or to swing in under the shoulder formed by the collar:

19, the pivots on which the jaws oscillate:

20, a stem having its rear end coupled to the two jaws:

'21, a T-shaped head on the inner end of this stem and engaging in slots in the front ends of the jaws:

- 22, a lever disposed at the front of the faceplate and block and having its heel mounted on a pivot carried by the block:

22, a helical spring surrounding stud 20, its rear end engaging against the lever, stud 20 passing freely through the lever:

23, an adjusting nut on the stem, to serve in adjusting the tension of spring 22*:

24, an inclined cam carried by the faceplate above the jaws:

25, a roller carried by the free end of the lever and adapted to "engage cam 2 1 and swing. the lever outwardly as the ram descends:

26, a spring stud carried by the block and projecting freely outward through the lever and adapted to urge the lever rearwardly:

27, a setscrew passing through the lever and adapted to engage the block:

28, the pivot on which the lever swings: and

29, the pivots connecting the jaws with stem 20, these pivots being inward of the pivots 19 on which the jaws are mounted.

Giving consideration to Fig. 2, the ram is in its; uppermost position; the punch is resting on the plate to be punched; the teat is .in one of the punch marks of the plate; the plate may be shifted -about as desired, the coned teat causing the punch all to rise, the teat dropping into a selected prick-punch mark; the ram starts down; the punch remains stationary supported by the plate; the roof of recess 11 eventually engages the top of the punch-stock; the rain continues its descent and the punch is forced through the plate; the descent of the rain has brought the top of the open jaws below the level of the shoulder Hit the foot of collar 13 the roller has engaged cam 24: and swung the lever outwardly and closed the jaws under the collar; the ram rises; the punclr stock and punch are pulled upward; the punchis withdrawn from the plate, which is held down by the stripper; the lever swings inwardly; the jaws release from under the collar; the punch-stock and punch may descend by gravity; in the absence of the plate their descent would be limited by the engagement of the fork with nut 16 the parts are in condition "for the shifting of the plate fora new punching operation.

If, instead of the plate illustratecha thinne plate be put under the punch then the teat would not reach the plate and the desired. feeling, on the'part of the operator, for the punch mark, could not 'be accomplished. By adjusting nut 16 on its stud, the normal idle floating position of the punch, that isto sayfin the absence of a plate, may be adjusted to suit any thickness of plate within the capacity of the device. When the ram is up and a plate present, the punch is a floating punch, being supported by the plate when the plate is present, and being supported at the proper vertical height by the nut 16 when the plate absent. The plate being absent, and the floating punch being supported bynut l6,'the plate'may be inserted edgewise between thepunch and die, the'cone of the teat ele ating the punch a trifle and permitting the point of the teat to ride on'the plate.

From a study of Fig. 2, it will be apprehended'that the jaw arrangement constitutes a let-go deviceyof aknown class, to drop the punch to floating position after it has been raised sutliciently high for the stripping; that when the plate is present nut 16 is without otfice ;-that when the plate'is absent, then the punch could drop too low for'the rednsertion of "the plate if thenut werenot prescut; that ifall plates were of the same thickness the nut wouldconstitute a supporting device and no adjustment of it would be needed; and that by reason of its being a threaded agent it'becomes an adjustable sup porting device to prevent the punch from dropping so low as to preventthe convenient insertion of anew plate, whatever the thickness of the plate adjusted for, within the capacity of the adjustment.

The program of events which have been given, or the "result of the program rather,

would be brought about if the lever or stud 20 were operated by hand, but the cam and roller arrangement makes the operation of the jaws automatic. The employment of block 1st provides a peculiarly convenient means for forming an openable bore to re the lever inwardly, while the office of spring 7 22 =ist0 render elastic the connection between the jaw s and the lever so as to provide for inaccuracies of construction andmovement. For instance, if thisoonnection were not elastic it might be that the jaws-closed completely upon the punch-stock while the lever was still-straining outwardly upon stud 20.

Ifit be desired to temporarily abandon the floating scheme it may be done by adjusting set-screw 27 inwardly against the block until the lever is forced outwardly and :held permanently in a position corresponding with the closed position of the jaws un der the collar of the punch-stock, under which conditions the punch will partake of substantially the full rising and falling motion of the ram. The floating scheme may be restored to 'activity by merely backing out the setscrew 27 tothe idle position illustrated. \Vhen theiuvention is realized in a vertically reciprocating punch, as illustrated, the gravity of the punclrstock ser es as the agent for pressing the idle punch'to the surface of the plate being punched, or pressing the fork to the -nut.16.when the plate is absent.

1. A punching machineeomprising, a reciprocatin'g ram,,-a punch-stockihaving a limited reciprocatingmiotion in the I'Etlllyttlld an adjustable supporting device disposed be tween the:punch-stockand the ramand serving to adjustablylimit the :protrusion of the punch-"stock from the ram when jthereiisino plate present for the punch to float upon, combined substantiallyas set forth.

2. Apunchingmachine comprising, a reciprocating ram, a punch-stock having a limited reciprocatingmotion in the ram, an adjustable supporting device disposed between-thepunch-stock and the ram and serving to'adjustably limit the protrusion of the punch-stock fromthe ram, a downwardly presenting shoulder formed upon thepunchstock, pivoted jaws carried by the ram and adapted *to open and close uponthe punchstock below'said shoulder. and means .for moving the jaws to open and closed position, combined substantially as set forth. I

3. A punching machine comprising, a re 'ciprocating. ram, a punch-stock having a limited reciprocating motion in the ram, an adjustable supporting device disposed between the punch-stock and the ram and serving to adjustablylimit the protrusion of the punch-stock from the ram, a downwardly presenting shoulder formed upon tliepunchstock, pivoted jaws carried by the ram and adapted to open and close upon the punchstock below said shoulder, a pivoted lever ing to adjustablylimit the protrusion of the punch-stock from the ram, a downwardly presenting shoulder formed upon the punchstock, pivoted jaws carried by the ram and adapted to open and close uponthe. punchstock below said shoulder, a pivoted lever carried by the ram, an elastic connection between the lever and the jaws to open and close the jaws as the lever is oscillated, and means for locking the lever in position corresponding with the closed position of the jaws, combined substantially as set forth.

5. A punching machine comprising, a reciprocating ram, a punch-stock having a limited reciprocating motion in the ram, an adjustable supporting device disposed between the punch-stock and the ram and serving to adjustably limit the protrusion of the punch-stock from the ram, a downwardly presenting shoulder formed upon the punchstock, pivoted jaws carried by the ram and adapted to open and close upon the punchstock below said shoulder, a pivoted lever carried by the ram, an elastic connection between the lever and the jaws to open and close the jaws as the lever is oscillated, and a fixed cam carried. by the frame-work of the machine and adapted to vibrate the lever and close the jaws as the ram moves downwardly, combined substantially as set forth. 6. A punching machine comprising, a reciprocating ram, a punch-stock having a limited reciprocating motion in the ram, an adjustable supporting device disposed between the punch-stock and the ram and serving to adjustably limit the protrusion of the punch-stock from the ram, a downwardly presenting shoulder formed upon the punch-stock, pivoted aws carried by the ram and adapted to open and close upon the punch-stock below said shoulder, a pivoted lever carried by the ram, an elastic connection between the lever and the jaws to open and close the jaws as the lever is oscillated, a fixed cam carried by the framework of the machine and adapted to vibrate the lever and close the jaws as theram moves downwardly, and a spring connected with the lever and tending to urge the lever to position corresponding with the open po sition of the jaws, combined substantially as set forth. 1 I

7. A punching machine comprising, a reciprocating ram, a punch-stock having a limited reciprocating lnotion'in the ram, a stud carried by the ram, an adjusting nut on the stud, and a fork carried by the punchstock and adapted to engage said nut to limit the protrusion of the punch-stock from the ram, combined substantially as set forth.

8.'A punching machine comprising, a reciprocating ramhaving a recess in its base, a..block=secured against the lower portion of the ram and adapted in conjunction with the base of the ram to furnish a vertical bore for a'punch-stock, a punch-stock fitted to slide vertically in such bore, and a collar on the upper end of the punch-stock to be engaged by the roof of the recess in the ram in the course of the descending motion of the ram, combined substantially as set forth.

9. A punching machine comprising, a reciprocating ram having a recess in its base, a block secured against the lower portion of the ram and adapted in conjunction with the base of the ram to furnish a bore for a punch-stock, a punch-stock fitted to slide in such bore, a collar on the upper end of the punch-stock to be engaged by the roof of the recess in the ram in the course of the descending motion of the ram, pivoted jaws mounted on the block and adapted to cooperate with the punch-stock, a lever pivoted to the block, and a connection between the jaws and lever to cause the vibration of the lever to open and close the jaws, combined substantially as set forth.

10. A punching machine comprising, a reciprocating ram, a punch-stock having a limited reciprocating motion in the ram, an adjustable supporting device disposed between the punch-stock and the ram and serving to adjustably limit the protrusion of the punch-stock from the ram, a downwardly presenting shoulder formed upon the punchstock, pivoted jaws carried by the ram and adapted to open and close the punch-stock below said shoulder, a pivoted lever carried by the ram, an elastic connection between the lever and the jaws to open and close the jaws as the lever is oscillated, and a normally idle setscrew carried by the lever and adapted to be adjusted to position to lock the lever to position corresponding with the closed position of the jaws, combined substantially as set forth.

11. A punching machine comprising, a die, a punch to cooperate therewith, a reciprocating ram to push the punch through a plate and into the die and to withdraw Tagit therefrom, a stripper to limit the rising of the plate from the die as the punch is Withdrawing from the plate, a let-go device connecting the punch with the rain to cause the punch :to rise with (the L'itl11 fl11(l-bl16l1l)6 released to descend and Heat upon the plnte, ends supporting device-carried by the rain and sewing to :limit the descent ofithe punch after release in the absence of a ;plete,'-\vhe1 eby the releasedpunch may become :zu rested at a distance from the-die suliicient for the insertion of a plate between -l3l1G1I1,--COlTll)ll16Cl substantially as set forth.

12. A punching machine comprising, :a die, a -punch1to cooperate therewith, a z1-eciproczitin'g F3111 to push the ,punch through a plateend into the die ztndito withdraw it therefrom, e stripper to limit the rising of the plate from thedie as the punch is Withdrawing vfrom the plate, a letgo device connecting the punch With the I ELIHtO .eziuse the punch to .rise with the J'Zlniill'id then be released to descend and host upon the plate,

may become arrested at an adjusted dis- Lance from :the die sufficient fot the insertion ofe platebetween them, combined substentiailly asset forth.-

PAUL TATE-R.

Witnesses:

PAUL SOUDDER, M. S. ,BELDEN.

(lopies of this patent may be obtained for five cents eaielnby addressing the Commissioner of Ia'tents,

Washington, D. C. i i

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