US323200A - Split nail or tack - Google Patents

Description

(No Model.) I

R. S. PIGKETT.

SPLIT NAIL 0R TACK.

No. 323,200.. Patented July 28, 1885.

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RUFUS S. PICKETT, OF NEW HAVEN, CONNECTICUT.

SPLIT NAIL OR TACK.

EPECIFICATION forming part of Letters Patent No. 323,200, dated July 281883.

I Application filed February 2, 1885. (No model.)

To all whom it may concern:

Be it known that I, RUFUS S. PIOKETT, of New Haven, in the county of New Haven,and in the State of Connecticut, have inventedcertain new and useful Improvements in Split Nails or Tacks; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which Figure 1 shows a view in'elevation of my improved nail or tack, enlarged so as to show the details of its form more clearly; Fig. 2, a sectional View of the same on line 00 w of Fig. 1; Fig. 3, an end view of the same as it appears when looking at its point, and Fig. 4a

detail vertical sectional view of thelowerportion of one of the prongs or legs of the nail or tack.

Letters of like name and kind refer to like parts in each of the figures.

The object of my invention is to provide an improvement in split nails or tacks.

In the drawings, A designates the head of the tack or nail,and B the shank of the same, pro- 2 5 vided with thelongitudinal slot C, extending from the point Well up toward the head A. In crosssection, as shown in Fig. 2, the tack or nail is oblong or oval, the corners of the oblong being rounded so that the oblong has rounded ends. The slot C is parallel to the rounded edges or sides of the shank. At the point the ends of the prongs are beveled inward on each side toward the slot C. Instead of making this bevel plane,I prefer to make it concave, as shown in the drawings. The bevel of each prong end is concaved not only transversely, but also longitudinally. This leaves not only a much sharper cutting-edge at the extremepoint of each prong thanaplane bevel would, but also makes sharp edges extending some distance up the sides of the prong ends. As I have found by experiment, making the prong-points of this peculiar shape insures the easiest penetration, and also the easy and uni- 45 form spread of the points, so that they shall take the best and firmest hold 011 the material into which they are driven.

In practice my tacks are made of fiat roundedged wire, a cross-section of which couldbe 5 called an oblong with rounded ends. This peculiar form of wire or blank leaves the nail or tack,after slotting,with full strong prongs of great holding-power,and of such shape that the hole made in the material with which it is used by it or to receive it does not have to be of such size or shape as to weaken the material, as is the case where round or square nails or tacks are used. My nail or tack is also much easier made than round or square ones, as there is less stock to cut away at the slotting of the point than in such other forms. In making it, the mill which is used to cut the slot is so formed that it cuts the peculiar form of concave bevel of the prong ends at the same time. As indicated already hereinbefore,this concaving of the prong end bevels is an important point, as better and sharper cuttingedges at the prong ends can be obtained thereby.

The bevels of the prong ends of the ordinary 70 and well-known forms of the split nails or tacks can obviously be to advantage coneaved, as set forth herein, to secure the best cuttingpoints.

My nail or tack as described is especially well suited for securely fastening leather or metal plates to any part or parts of rubber shoes or boots that need to be protected, but is also suited for use wherever split nails or tacks are applicable.

The mill used is so formed that both curvatures or concaves of the bevel end of each prong are of the same radius.

Ihaveinvented an improved method of using my split nail or tack as described above, as well as other well-known forms of split nails or tacks. Such method is fully described, set

'forth, and covered in an application filed by me June 3, 1885, as a division of this applica tion. I do not, therefore, herein claim any particular method of using the nail or tack described and shown, but limit myself to the article.

Having thus described my invention,what I claim is 1. As an article of manufacture, a nail or tack having its shank in cross-section and oblong with rounded ends, and provided with a longitudinal slot cut in the shank parallel to the rounded edges or side thereof, substan- IOO tially as and for the purpose described.

2. As an article of manufacture, a split nail or tack having the ends of its prongs In testimony that I claim the foregoing I formed with a concave bevel, substantially as have hereunto set my hand this 12th day of 10 and for the purpose described. January, A. D. 1885.

3. As an article of manufacture a split or 1 w 5 slotted nail or tack having the ends of its RUFUS PIGKETI" prongs beveled, and such beveled portions con- \Vit nesses: caved both longitudinally and transversely, JOHN H. POST, substantially as and for the purpose described. LOUIs S. DAY.

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