US534558A

US534558A - Railroad-spike

Info

Publication number: US534558A
Authority: US
Publication date: 1895-02-19
Anticipated expiration: 1912-02-19

Description

P. E. GRAU. RAILROAD SPIKE. No. 534,558. Patented Peb'. 19, 1895.

(No Model.)

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Jill/777M178 PATENT OFFICE.

FREDRIOK EZRA GRAU,-OF CROSS FORK, PENNSYLVANIA.

RAI LROAD-SPI KE.

SPECIFICATION forming part of Letters Patent No. 534,558, dated February 19, 1895. Application filed July 22,1893. Renewed November 28, 1894. Serial No. 530,280- (No model.)

To all whom it may concern.-

Be it known that I, FREDRICK EZRA GRAU, a citizen of the United States, residing at Cross Fork, in the county of Potter and State of Pennsylvania, have invented new and use-- viding a spike with a head having an inner and an outer projection the under surfaces of which are of diiferent elevations and arranged at different angles, to bear upon the bottom flange of the rail, and uppersurface of the cross-ties, as hereinafter more fully set forth.

It .also consists in providing the outer projection of the spike-head with downwardly projecting side-spurs, which, when embedded in the tie, insures a perfect brace both for the spike and rail, as is hereinafter more fully explained.

Referring to the accompanying drawings, Figure 1 isa perspective viewof my improved spike, and Fig. 2 a perspective view of a railroad-rail, as secured to cross-ties by my improved spikes.

My improvement can be applied to a spike of any form, but I preferably construct the spike with a rectangular shank, having a chisel-shaped point, as shown, at Fig. 1, and with the under-surface of the head projecting outwardly, at right-angles, as shown at a and provided at its rear edge, with two downwardly projecting spurs b, I), while at the opposite side of the spike the under surface of the head is inclined upward as at 0 so as to engage the bottom-flange of a railroad-rail, when the under surface a, shall be brought in contact with a cross-tie.

From the extremities of the spike-head, the lines curve upwardly to form a crown e, so as to insure greater strength to the spike.

An essential feature of this invention consists in the downwardly projecting side-spurs, or bifurcated end of the spike-head, for resisting diagonal as well as outward pressure.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

As a new article of rnanufacture'a railroad rail spike having a head provided with inner and outer projections, the inner projection arranged at an angle to engage the bottomv flange of a railroad-rail and the outer projection provided with a downwardly projecting bifurcated lip, or side spurs, the head of the.

spike extending over said spurs and forming a connecting web, substantially as and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

FREDRIOK EZRA GRAU. Witnesses:

ROB. B. KNIGHT, N. BAUGHMAN.