US152735A - Improvement in lasting-nail blanks - Google Patents

Description

W. E. FISCHER.

Lasting Nail-Hanks.

N0.|52,735. Y Pat-entedluiy 7,1874.'

UNITED STATES PATENT CFFICE.

WILLIAM E. FISCHER, OF BOSTON, ASSIGNOR TO CHARLES H. TRASK, OF LYNN, MASSACHUSETTS.

IMPROVEMENT'IN LASTING-NAIL BLANKS. l

Specification forming part of Letters Patent No. 152,735., dated July 7, 1874; application filed August 4, 1873.

To all whom it muy concern:

Be it known that I, VILLIAM E. FrscnER, of Boston, inthe county of Suffolk and State of lvlassaehusetts,lhave invented an Improved Lasting-Nail Blank 5 and I do hereby declare that the following, taken in connection with the drawings which accompany and forni part of this specification, is a description ot' my invention sucient to enable those skilled in the art to practice it.

My present invention is an improvement upon the langeless nail-blank shown and described in my patent of J une 1, 1869, No. 90,650, reissued July l, 1873.

My invention relates to the construction of a nail-blank from which, in a suitable machine for driving the nails,7 flatheaded nails or tacks may be cut one after another in regular succession from the end of the blank; the particular object being to produce a bll nk for use with a device for lasting` boots and shoes, and in which, by the same action of the mechanism that drives the nail, the nail to be driven is severed from the blank.

In my invention I roll a plate so that in cross-,section it is of T shape, having a iiat, straight, undivided head or ange, and a toothed shank-forming web, the teeth being eon1b-like, very acute-angled, and joined at, and only at, their heads, and by the flat o'r Eat-topped head-forming piece, from which the teeth are integral projections, a nail being formed from the blank by separation of its head. The invention consists in this peculiar blank.

The drawing represents a blank embodying my invention, and a nail cut therefrom.

A shows the blank in front View. B is an end view of it. C is a top view of it. D shows the severed nail.

a denotes the head or head-piece, from which extend the shanks b, eachv shank being pret'- erably a quadrangular pyramid, square in section, and the head being in cross-section ilat on its top, thin-edged at its opposite sides, andv joined to the shank or tooth piece by inclined faces.

In using the blank for lasting or nailing, I sever each head at the line of the angle between the two outer teeth, the head of the severed nail being square or rectangular in section. It is requisite that the nails should possess dat heads, and I obtain such heads by rolling the plate so that the outer face of each edge portion is straight and dat.

With a nail-blank formed in accordance with my invention, I can last or cut and drive lasting-nails very rapidly, and very greatly reduce the cost of lasting-nails.

I claim- The blank for lastingnails, having the anged head-forming portion a, from which project the Shanks b, substantially as shown and described.

Executed this 12th day of June, A. D. 1873.

WM. E. FISCHER.

INitiiesses:

FRANoIs GoULn, M. W. FROTHINGHAM.

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