US377452A - haevey - Google Patents

Description

(No Model.) I

Y H. A. HARVEY.

- WIRE SCREW NAIL. v No. 377,452. Patented Feb. 7, 188 8. K

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,-UNITED STATES PATENT OFFICE- i I -HAYWARD A. HARVEY, OF", ORANGE, NEW JERSEY.

' WIRE SCREWJ-NAIL.

SPECIFICATION forming part of Letters Patent No; 377,452, a atea February 7,1888.

7 Application filed July 29, 1887. Serial No. 245.589. 'lNo model.) 1 V I To dz; whom it may concern:

Be it known that I, HAYWARD A. HARVEY,

of Orange, New Jersey, have invented a cer-,

taiu Improvement inWire Screw-Nails, of WhlCl 1 the following is a specification.

This improvement relates. especially to wire nails, the peculiarity of which is that they are comparatively slender in proportion to their length.

The invention consists in providing the end of the blank which isto' serve as the-head with'a V-shaped notch of such depth that when the'nail is used the blows of the hammer upon its bifurcated end spread apart the two branches thereof and make them sub serve the purpose of ahead. Ordinarily the notch is not entirely obliterated by the act of driving in the nail, and enough of it remains to'serve as a nickforfthe engagement of a screw-driver, byineans of which the screwnail may be unscrewed from the woodinto which it has been driven. A

The formation of the bifurcated heads is preferably effected in the act of severing the blanks from the coil'of wire from which they are made by the use of suitable V-shaped cutting-dies. The blanks thus successively produced are each bifurcated at one end and chisel-pointed at the otherend. Having been severed from the coil, the blanks may be successively fed to athreading-machine, by means of which a screw-thread may be formed ,upon

theirbodies. It is not, however, essential that the blanks be severed from the coil before being threaded, because the coil of wire which may be either continuous" or formed upon the'wire at suitable intervals, leaving blank or unthreaded portions at and adjoining the places where the severing operations are to be performed.

It will of course be understoodthat the notched or bifurcated head may be employed for wire screw-nails having points of any shape, such as conical points or pyramidal points; but as wire screw-nails are ordinarily used for driving in comparatively soft wood,

the chisel-point will be found to answer every purpose, and the wood will not offer sufficient resistance to prevent the screw-nail from be ing readily unscrewed and removed by means of a screw-driver.

The accompanying drawings of wire.screw nails embodyingthe invention are as follows;

Figurel is a perspective view of a wirescrew- 55 nail bifurcated at one end and chisel-pointed at the other," having a. rolled screw-thread formed upon the whole of its body from the branches of its bifurcated head. Fig.3 is' an elevation of a conically-pointed wirerscrew.

nailembodying the invention of ,thebifureated' 6 5 or notched head, and having theporti'onof'its shank adjoining the head unthrea'ded." Fig. 4 is an elevation exhibiting the effect pro;

vduced upon the head, of the wire screw-inail;

the act of driving it'int'o .79

shown in liig. 3 by wood. a a. v The characteristic features of screw na ls it that their bodiesvA, or any desired portions thereof, are provided with a screw thread,f a; 5

simultaneously produced in theact of sever- 8 ing the blanks from the coil of wire from which they are made.

What is claimed as the invention is- 1 1. A wire screw-nail having one end suitably-pointed, and having its opposite end 9c p notched or bifurcated, but of the samefdiame ter as its body, and having its body or] any desired portion thereof provided with ascrewthread, substantially as shown and described.

'2. A wire screw-nail having'a chisel-point 5 and a notched or bifurcated end, and a body the whole or any desired ,port ion of which is s provided with a screw thread, substantially as shown and described.

Witnesses: v

A.;M. JoNEs, y 'E. H. WILLI Ms.

H. HAR EY;

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