US100055A - Improvement in spikes for railways - Google Patents

Description

een@ sam JAMES MoNTeoMERY, or" Nnw YoRIc'N. Y.

Laim raam: No. 100,055, daad February 22, "1870.

IMPRovIni/mr:'r' 1N SPIKEs ron RAILWAYS.

. The Schedule refen'ed'to 1n these Letters Patent and making part of thesame.

I, JAMES MONTGOMERY, ofthe city, county, and State of New York, have invented a new and useful Improvement in Railway-Spikes, which is described as follows:

Nature and Object of the Invention.

My improved spikes are vmade to be used in pairs, one of them, which is to iicld 'the rail, having transverse barbs in its face, which barbs are made to enter the wood by driving the second spike down at the back of the first, and lthe second spike is fornied on its face with a depression, which, vas the said spike is wedged down at the back of the first, springs or' slips over a corresponding projection thereon, which holds vthe seeond spikefrom working loose by accident, and the barbsof the rst spike prevent this from being drawn out by-any force applied to its head.

XVhen the spike is to bev taken out, the supplementary spike must be rst drawn lout witlra claw-bar, and the barbed spike being then pressed back intothe 'cavity leftby thersupplementary spike, the barbed spike will come out without diihcnlty.

Gen-eral Description with. Reference to the Drawing.

In the accompanying drawng- Figure 1 is an elevation of a pair of myimprorel spikes, parts of the tie and o i the base of therail being shown in section. y

Figure 2 is a perspective view of the barbed spike,

and

Figure 3 is a perspective view of the supplementary spike.

. head a projecting froml one side, for the purpose of engaging with' the base ofthe rail, and on the surface of the spike are formed barbs b b b, which hold firmly in the v,wooden cross-tie when the spike is driven.

On the opposite face of the spike is a protube ance, c.

The key spike D is formed with a head, d, for the pnr pose of drawing it when necessary', a dat face -to vfit against the dat face ot' the spike, and 'a.1'eeess, e,'toV engage and fit over the protuberance c of the spike A.

In use, the spike A is rst driven into the crosstie, its head engaging and holding the base of' the rail in customary manner.

The key spike D is then driven in close contact'wit-h A, L

and, by its wedging action, it forces the barbs b more firmly into the wood.

The driving is continued until the recess e springs over the protuberance c, so as to lock the spike A, and in this condition the combined or duplex spike is irmly secured against drawing by any strain which the lrail may exert upon the head a of the spike A.

If, however, it becomes necessary to remove the holdingspike A, the key spike D is first drawn, by means of a .claw-bar. The holding spike A is released and may readily be withdrawn.

Figure 4 illustrates the applicationV of the same invention to triple spikes. v i

In this case the key spike I) is driven centrally between the outerspikes A and F after the latterhave been inserted.

The projections c may be on the two outer spikes, A and F, as shown in fig. 4, both on the central or key spike, as shown in Figure 5, or one on the central key spike, and one on either of thev outer ones, as illustrated in Figure 6.I

Claim.

I claim as my invention- I v l The spikesA D, provided respectively with one or more projections aand lrecesses e, and adapted for combined use, substantially as described.

JAMES MONTGOMERY.

Witnesses:

Tnos. B. KINesLkND,` OcrAvIUs KNIGHT.

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