US917739A - Steel-punch. - Google Patents

Description

T. G. OWENS.

STEEL PUNCH.

APPLICATION FILED MAY 16, 1901.

0u L m P m 9 3 2D H/ f E PK E 9 w 7 7 mm.

T. G. OWENS.

STEEL PUNCH.

APPLIOATION FILED MAY 16, 1907.

91 7,739, Patented Apr. 6, 1909.

2 SHEETS-SHEET 2 UNITED s'rA'rEs TIMQTHY G. OWENS, OF

DUPUYER, MONTANA, ASSIGNUR ()F ONE-HALF TU JOHN l",

HUGHES, OF SHELBY, MONTANA.

STEEL-PUNCH.

Specification of Letters Patent.

Patented April 6, 1909.

Application filed May 16, 1907. Serial No. 373,953.

To all whom it may concern.

Be it known that I, 'lmo'rnr G. OWENS, a citizen of the United States, residing at Dupuyer, in the county of Teton, State of Montana, have invented certain new and useful Improvements in Steel-Punches; and I do her by declare the following to be a full, clear, and exact descri tionpf the invention, such as will enable ot ers skilled in the art to which it appertains to make and use the same.

This invention has relation to that class or kind of punches that are adapted to punch holes in iron or steel plates or other kinds or forms of metal, and that comprise a die and punch proper, the latter being adapted to be operated by percussion or pressure.

It is the UbJH'l of the invention to provide improvements that will enhance the facility and accuracy with which the ninch may be employed, as well as to simplil its construction to the utmost in view of the scope of the Work it is capable of 1mrlhrming.

The nature of the invention is fully and clearly ascertainablo from the device portrayed in the annexed drawings, forming at art of this slwciiicoiion, in view of which it will first be described with respect to its construction and mode of operation and then be pointed out in the subjoinod claim.

Of the said drawings--ligure 1 is a perspective view of the punch complete, showing how it may be held in the hand and be set to punch bolt, rivet or other holes through a metal work piece. Fig. 2 is an enlarged vertical section taken on the line 2, 2, Fig. 1. Fig. 3 is a plan of the die. Fig. 4 is a perspective view of the punch separated from the machine. Fig. is a plan of the front end of the rocking lever that carries the punch.

Similar characters of reference designate similar parts or features, as the case may be, wherever they occur.

As is indicated in the drawings, the frame of the punching device comprises a base A and an overhanging arm B, the said two artsbeing integrally connected at what may 0 considered tieir rear ends b an. integral bow or bond (3 to form a U-sli aped frame. The base A is rovided at its forward end with a termina enlargement, forming\ a die socket 1 adapted to receive the die D aving a hole 2 formed through its center. The overhanging arm B is coextensive with the base, and is provided at its forward end with a terminal enlargement lprmmg a guide-head 3 having a-vertical aperture formed therethrough, in which the shank or body 4 of the unch E is held. T he said )unch is arranged in the guide-head so as to e in exact alinement with the hole 2 in the die D. Moreover, the hole in the die is of the some form in cross section as the'punch considered in the same we that is if the former is round the latter wil be also, and if the former should be square or triangular the latter will conform thereto.

The punch E while made to fit the hole in the die will be so formed as to move easily therein.

The base and overhanging arm will be of such length as may be required to )ermit metal plates or other pieces of metal to be arranged between them so that a hole or holes can be punched therethrough at the proper point or oints. The base member is also constructs to be supported on an anvil (not shown) or on a suitable block or bench. In the two latter instances a bench-plate (not shown), well known in the art, ma r be employed for the immediate sup ort o the base member, which has a vcrticartang as shown in Fig. 1 to fit in the hole in the anvil or bench-base. The socket and guide forming enlargements, are positioned proximal to one another.

L ,designates a rock lever, fulcrumed by means of :1. depending lug, to the upstanding stud 6 on the 11 per side of the overhanging arm said lever raving at one end a handle termination to be pressed upon by the thumb in setting and releasing the punch. The forward end of the lever L 1s bowed and forked and its terminals are provided with integral pins 7, 7 extending inward toward each other; and as the pron s or tines 8, 8 of the fork are resilient, the en s may be sprung apart and released to cause the pins 7 to ei1- ga. e the rounded sockets 9, 9 formed in the si es of the body 4 of the punch E. u

A spring 8 is arranged between theupper surface of the overhanging arm B and the lower surface of the rear portion of the lever L and operating with a tendency to press the forward end of the lever carryin the punch body provided with the punch TE down toward or u on the die D, this movement being permitted by means of the resilient prongs 8, 8, and the rocking movement imparted to this lever L, by means of =thc depending selllll curin lug. The punch-body and punch are The lower or o crating end of the punch is provided centra y with a point p which is adapted to be set upon the mark'made for the center of the hole to be punched, so that the punch will not on] be centered but will be guided straight t irough the material, punching'out a plug that will pass directly through the hole in the die.

The die D and punch body 4 are made removable so that punches and dies, or dies having holes of different size and shape may be employed.

Supposin the parts to be assembled as shown in ig. 1, a plate of steel or iron, marked or dotted at the points where holes are to be punched therethrough, will be placed on the die the punch having been previously raised, the work piece bein moved so as to center the point of the P1111031 on the mark, when by the release of the lever L the unch will be set upon the material and b a blow of a sledge-hammer, or lighter striking tool upon ,the top of the punch-body, the punch 4 will cut a hole through the material,

orcing the plug cut out through the hole in the die. The work done under the desrribed circumstances will be perfect. formed through the material will have clean cut sides and scarcely a perceptible fin on the under surface.

The hole When a die of different size or form is to be used, the one in the base can be lifted out and the desired die substituted for it. The same can be done with the (punch-bod provided with a Fpunch correspon ing to the ole in the die. .y sp "nging apart the prongs on the end of the forward arm of the lever I the punch body can be released and another put in its place.

The punch is adapted to be used in the manufacture of cutlery, or in machine shops to punch rivet or bolt holes through lates of metal, or in blacksmith shops or s ops on farms, and elsewhere. Its simplicity, ease of operation, and the low cost at which it may be produced commend it for use wherever a relatively small metal punch may be re uircd.

Vhat is claimed is- A U-shaped frame having two terminal enlargements one forming a guide head and the other a die socket, these enlargements being positioned proximal to one another, a die within said socket, a punch slidably held within said guide head, an upstanding stud carried by said frame along the upper edge, a rocking lever held by said stud having its forward end forked to provide two bowed nesilient prongs ending in inward extendi pins, said pins being in engagement with sai punch, and a spring interposed between said frame and lever, all arranged as set forth.

In testimon whereof, I aflix my signature, in presence 0 two witnesses.

TIMOTHY G. OWENS.

Witnesses:

WM. Dawns, H. J. SLAVIN.

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