US300204A - Staple - Google Patents

Description

UNITED STATES PATENT OFFICE.

CURTIS E. BEAINAED, or JOLIET, ILLInoIs.

STAPLE.

SPECIFICATION forming part of Letters Patent No. 300,204, dated June 10, 1884.

Application filed February 15, 1884. (No model.)

To all whom it may concern:

Be it known that I, CURTIsl B. BRAINARD, a citizen of the United States of America, residing at Joliet, inthe county of Will and State of Illinois, have invented certain new and useful Improvements in Staples, of which the following is a specification, reference being had therein to the accompanying drawmeans for re'enforcing or strengthening the head of the staple at the place where the blow is struck in driving it by leaving additional metal on the head thicker in the center than at either end, diamond-shaped in form, and having said re-enforcing metal extend downward on the sides and rnnout in a point.

Referring to the drawings, Fig. l shows a perspective view of the staple, P P being its prods or legs, and R the additional 11e-enforcing part of the head. The staple is formed by shearing it off diagonally from the end of a metal strip rolled in form as shown in crosssection in Fig. 4. Fig. 3 shows the angle at which the staple is so sheared or cut off,'and Fig. 2 shows how or in what manner it is so sheared off, the legs or prods being out off first and bent downward in the proper forni,

and the headcnt loose last, which is done by properly-shaped punches and dies. In order to furnish the staple with the additional diamond-shaped re-enforcing head R, the strip S is rolled so as to leave the central rib, R, elevated above the contour of the strip, as shown in cross-section in Fig. 4. This rib when cut across diagonally, as shown in Fig. 3, will leave a diamondshaped elevation or head irnmediately on the head of the staple, as shown in Figs. l and 2. This additional head R receives the blow vwhen the staple is driven, and, being integral with it, renders it strong and not liable to break at that point. By seven ing the staple from the strip in a` diagonal manner the points are formed on the ends of 5o the prods or legs, but beveled in opposite directions, so that when the staple is driven the legs will spread, and thus lock the staple in the wood.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is as follows, to wit:

The staple described, .having its head re-enforced andstrengthened by means of the integral additional metal R, formed of a portion of the rib R of the strip S by means of shearing the staple from the diagonal end of said strip, and having its points beveled in opposite directions, as and for the purpose set forth.

CURTIS B. BRAINARD.

XVitIIesses RUEUsJ. DELANO, JosEPII L. HEME.

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