US 987355 A
Description (OCR text may contain errors)
W. J. GDDWIN.y
PUNCH. APPLICATION FILEIS AUG.13, 1910.
987,355, Patented 11131121, 1911.
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WILLIAM J. GODWIN, OF BUTLER, PENNSYLVANIA.
Specification of Letters Patent.
Patented Mar. 21, 1911.
Application filed August 13, 1910. v Serial No. 577,116.
.To all whom it may concern:
Be it known that I, WILLIAM J. GoDwIN, a citizen of the United States, residing at Butler, in the county of Butler and State of Pennsylvania, have invented certain new and useful Improvements in Punches, of which the following is a specication.
My invention consists of an improvement in punches for jewelers and others use, and has for its object to provide a device for punching or swaging metal or forming small centers or holes therein.
The device is intended for use by one hand only, and consists of a hollow stem provided at one end with a suitable punch, preferably removable; at the lother with a terminal knob or button; also an impact shoulder or abutment intermediate its ends; a hammer slidingly mounted on the stem and adapted to strike against the abutment, and a tension spring within the hollow stem, as hereinafter more fully described.
Referring to the drawings -F igure l is a view of the device in elevation, in position for use. Fig. 2 is a similar view showing the hammer raised. Fig. 3 is an enlarged vertical section through a portion of the device. Fig. 4 is a perspective view showing one manner of using the tool.
The main element of the device is a hollow ste-1n 2 to the lower end of which is secured by screw connection at 3 or otherwise as desired, the terminal bit or punch terminal 4 of any desired form and of wellknown type. At the other end of hollow stem 2 is secured a terminal button or head 5 providing a bearing for the operators finger, as indicated in Fig. 1, and an annular abutment or bearing 6 is secured to or around the hollow stem 2 at a suitable position between its ends, against which the springactuated hammer acts to impart a blow to the punch 4, of the desired force.
The hammer consists of a slidingly mounted button 7 having a striking end 8 adapted for movement longitudinally of stem 2 and for the purpose of actuating the hammer, when raised and released, I provide a tension spring 9 within the hollow stem 2. One end of said spring is secured within the lower end of stem 2 as by a rivet or pin 10 engaging the stem and the lower terminal of the spring as shown in Fig. 3, and the other end is engaged by the end of 'a pin or screw 11 extending through a longitudinal clearanceslot 12, of sufficient length to permit the full stroke ofthe hammer, if desired.
As shown, the hammer 7 is formed with an annular button-like rounded periphery having under sides sloping downwardly and inwardly toward the hammer striking end 8, whereby the hammer may be readily lifted by the thumb of the operator at any position, and released as indicated in Fig. l.
The operation of the device will be readily understood from the foregoing description. The point of punch 4 is rst set against the surface to be punched or swaged, at the proper angle for the blow and held thereagainst by the linger on butt-on 5. The hammer, which is normally held against abutment 6 by tension of spring 9, is then raised by the thumb more or less acording to the blow desired, and released, its impact against abutment 6 driving the point of punch 4 into the metal or other surface operated upon.
The device is particularly adapted to the punching or swaging of small portions of metal as inthe setting of stones or gems. Ordinarily many such gems, especially the smaller ones, are temporarily held in position during the operation by the end of the finger, and the metal swaged up around the gem, as in Fig. 4. By my improved instrument this operation is facilitated and the adjustment, manipulation, and operation by one hand is rendered very easy, certain and effective.
The device is very simple and economical in construction, not liable to derangement, and will be found readily adaptable to a variety of uses. It may be made in different sizes or designs and with any strength of spring desired for the purpose intended, or otherwise varied by the skilled mechanic, within the scope of the following claims.
What I claim is 1. A punch consisting of a hollow stem having a terminal punch and a but-ton head respectively, an external anvil abutment, a slidingly mounted hammer having an annular extension, and an actuating spring within the hollow stem, substantially as set forth.
2. A punch consisting of a hollow tubular stem having a tool at one end and a button-shaped holding head at the other, an external anvil abutment, a hammer slidinglyy mounted on the stem having an annular lifting extension and adapted to strike against said abutment, and a powerspring within the stem adapted to impart moVement to the hammer to thrust it against the abutment when it is drawn backward therefrom and released, substantially as set forth.
3. In a tool of the class described, the combination of a hollow stem provided with an operating tool7 a button-shaped holding head, an external anvil abutment, and a longitudinal slot; of an external slidingly mounted hammer having an annular lifting,` extension, a tension Spring secured at WILLIAM J. GODWIN.
TWitnesses ANTHONY SHAFFER, RoT. BRAESEL.
Copies of this patent may ne obtained for ive cents each, by addressing' the Commissioner of Patents. Washington, D. C.