US257565A - Pateick dunn and thomas haeeis - Google Patents

Description

(No M5551. I 5 v r P. DUNN & T. HARRIS.

WIRE STAPLE.

No. 257,555. P55511555 May 9,1882.

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PATRICK DUNN AND THOMAS HARRIS, OF OQTE SAINT PAUL, QUEBEC, CANADA.

WIRE STAPLE.

SPECIFICATION forming part of Letters Patent No. 257,565, dated May 9, I882.

. Application filed Deccmber13, 1881. (No model.)

To all whom it may concern Be it known that we, PATRICK DUNN and Tnonms HARRIS, both of Cote Saint Paul, in the district of Montreal, in the Province of Quebec, Canada, have jointly invented certain new and useful Improvements in Wire Staples; and we do hereby declare that the following is a full, clear, and exact description of the same.

The object of this invention is to make a staple of bent wire which can be driven byan ordinary hammer without spreading the points,

thereby avoiding splitting of the wood into' which the staple isdriven.

()ur invention has reference particularly to staples for fastening the ends of wooden hoops for barrels; and it consists in inwardly depressing the head or crown of the staple, whereby the central portion will not be struck by the workmans hammer, the force of the blow hein g carried to nearly over the legs of the staple, which are pointed, one with an inwardly-beveled cut and the other with an outwardly-beveled cut, and the point bent inwardly.

Figure 1 is an elevation of our improved wire staple. Fig.2 is a top view of the staple as seen when fastening a hoop.

The staple consists of a wire out and bent in a machine.

In the manufacture of wire staples the head, although intended to be bent square, has a slight crown or upward curve centrally, and which portion, in driving the staple, receives the blow or impact of an ordinary flatfaced hammer, which not being adapted for driving the staple, generally a specially-constructed hammer is used. Such staples, when driven by an ordinary hammer, spread at the points,

- therebyare hard to drive and liable to split the wood into which they are driven. In our improved staple these objections are avoided. \Ve bend the wire constituting the head of the staple with an inward or downward curve, A, or indentation, whereby the said central portion will be free from contact with the hammer, the result being to remove the force or impact to nearly over the legs of the staple, whereby the tendency of the points to spread is removed. The points are formed by cutting the wire on a bevel in one direction and bending inwardly the point having the outward bevel, whereby an inwardly-turned point is formed to correspond to the-opposite leg, the bevel in both legs resisting the tendency to spread in driving.

The pointing of the staple-legs, whereby the bevel will be from the outside inwardly, we consider quite important, as thereby the tendency of the legs to spread when the staple is driven is lessened, and a saving of material is effected. If the wire were cut so that each leg had a corresponding bevel, a triangular piece of metal would be lost.

We claim as our invention- 1. As an improved article of manufacture, a wire staple having the crown or head depressed or indented, as set forth, for the purpose described.

2. A wire staple having the crown or head depressed or notched, as described, and the points of the legs beveled on the outside, as shown, for the purpose set forth. 7

3. A wire staple having the crown or head depressed or notched and the extremity of the legs beveled downwardly from the outer to the inner side to form a point and prevent thelegs spreading when driving.

4. A wire staple having the head or crown depressed or notched, one point out beveling on the ontside,and the other out parallel thereto and turned inwardly, as set forth, for the purpose described.

1?. DUNN. THOMAS HARRIS. Witnesses:

H. A. BAIN, A. BROGAN.

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