US1083194A - Punch. - Google Patents

Description

JOHN. L. CUBA', ler TAYLOR, '.ixAs. l

PUNCH.

Specicatin'vof Letters Patent.

Patented Dec. 30,1913.

Application sied september 4, 191,2. serial No. 718,513.

To all whom t may Gonne/m.' Be it known that l, JOHN L. CUBA, a citizen of the United States, residing at Taylor, in the county of Williamson and State of Texas, have invented new and useful Improvements in-Punches, of which the following is a specification.

This invention relates to metal punchers and has for an object to provide a punch of this character which will be effective in operation,--simple in construction, inexpensive in manufacture, and which will possess the maximum punching efficiency with a minimum application of pressure.

A further object is the provision of a removable anvil block which may be replaced .when injured or worn out, and whose con struction renders the same very effective in f operation.

The invention consists of Vthe-features of construction, combination and arrangement of parts, hereinafter fully described and claimed, reference being had to the accompanying drawings, in whichz- 215 .Figure l is a perspective view of the punch. Fig. 2is a fragmentary longitudinal sectional view of the same showing the punch in operation. Fig. 3 is a similar sectional view showing the punch after .the

90 operation has been completed.

The punch 'comprises companion pivoted members 1 and 2,the former comprising@ handle portion 3 and a curved jaw 4f, and

' the latter consisting of a'handle portion 5 co- 5 extensive with the handle portion 3 of the other member and a straight jaw 6 opposed to the coacting jaw 4. A curved spring 7 is interposed between the handles 3 and 5 to normally maintain the same in separated position to hold the jaws' likewise in separated position.

The jaw Ithas its downwardly curved eX- `tremity tapered gradually, as at 8, and its end beveled, as at 9, to provide a punch 10,

which is adapted .to be received by a cylindrical opening 11 in the coacting jaw 6.

llongitudinal recess -12 is provided in the upper jaw 6 in communication with the openin 11. A removable anvil block 13 formed of"hard steel is secured within the 'said recess by means of a transverse rivet 14 assing; through alined openings in the said aw 6 and the block 13, or a threaded'memr may be substituted for the .rivet if 'so i desired.' The' anvil block 13 has. its outer end psoj'ectin everjhe opening 11 a'nd is beveleddownwardly, asl at 1G, a straight cutting edge -17 being thus provided for .engagement with the inner face of the punch 1Q.

In operating the punch, the sheet of metal or other object to be punched, is inserted i between the jaws of the punch and the handles are gripped so as to force the punch 10 into the `opening 11. Upon slight application of pressure, the sharp toe 18 of the punch makes an incision in the metal, and a semi-circular flap is down-struck, due to the fact that the heel 19 of the punch is obtuse and thus does not cut the metal. Upon the application of more pressure, the heel'19 of the punch will coact with the cutting 'edge' 17of the anvil to sever the above-described iapas it passes below the cutting edge 17 o f the anvil 13, thus completing the opera- .tioili of punching the metal or other materia The anvil 13 may be removed whenever its cutting edge becomes damaged or worn, l

and a new one substituted therefor, and in order to renew lthe sharp point of the punch, it is merely necessary to grind the same into proper shape. It will thus be seen that I have provided a tool of this character which is adapted to last indefinitely and to edi- 'ciently serve its purpose whenever 'used A punch constructed in accordance with the invention may be used etliciently for punching holes in tin or other metal, and is especially adapted for use in punching holes in strips of tin or like articles for the reception of attaching nails oitacksf. The punch may be operated with very little exertion, as the only point of frictionalengagement between the punch and the anvil is at the eentral portion of its straight cutting edge, and the punch' further does not engage any poi'- tion of the jaw 6, the opening 11 being large enough to permit the free passage of thepunch.

Wliat is claimed is:

" 1. A punching tool comprising companion pivoted members having handles formed on adjacent ends thereo'f, coactino' laws formed on the opposite ends thereo one `of said jaws being provided with an opening, a te? movable anvil provided adjacent said opening and having an upwardly and forwardly inclined end face presenting an' active cutting edge forming the inner edge of the opening, and n punch formed Qn the jaw of `the other member, said punch being smaller in diameter than the sadop'ening and adapted to Work freely therein, the active end of `the said punch being beveled to rovid'e an acute toe and an obtuse heel, the atter being engageable with the cutting edge of the anvil y as it passes the same.

.and being provided with an opening, a

curved ljew formed on the corresponding end of the other member and having its free end beveled-to provide a* punch'heivingvl en ,outwardly disposed toe and an'iiiwardly dis- 15 -the said members, and an anvil mounted within the opening of the other-jaw at the inner edge thereof and being engegeable 20 vvith -the curved inner fagce of the punch J In testimony whereof I aiili my signature in .presence of two witnesses.

vWitnesses: p

" JEFF Wennen,

FRANCIS H. WELCH.

6021er: of this pltent may be btained for ve cents each, by addressingn'the Commiioner effetents,

Washington, D. C.

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