US1237472A

US1237472A - Machine for pulling railroad-spikes from ties.

Info

Publication number: US1237472A
Application number: US12717116A
Authority: US
Inventors: Thomas Corwin Chapman
Original assignee: J C MCMILLAN
Current assignee: J C MCMILLAN
Priority date: 1916-10-23
Filing date: 1916-10-23
Publication date: 1917-08-21
Anticipated expiration: 1934-08-21

Description

T. C. CHAPMAN.

MACHINE FOR PULLING RAILROAD SPlKES FROM TIES.

Patented Aug. 21, 1917.

THOMAS CORWIN CHAPMAN, 0F DAGGETT, CALIFORNIA, ASSIGNOR OF ONE-HALF TO J. C. MOMILLAN, OF DAGGETT, CALIFORNIA.

MACHINE FOR PULLING RAILROAD-SPIKES FROM TIES.

Specification of Letters Patent.

Patented A11 21, 1917.

Application filed October 23, 1916. Serial No. 127,171.

To all whom it may concern:

Be it known that I, THOMAS CoRwIN CHAPMAN, a citizen of the United States, residing at Daggett, in the county of San Bernardino and State of California, have invented a new and useful Machine for Pulling Railroad-Spikes from Ties, of which the following is a specification.

My invention is preferably constructed of steel and relates to an improvement in spikepulling machines. It operates in such a way as to preserve intact the spike so pulled so that. it can be used thereafter the same as in the first instance. The ordinary bar used for pulling such spikes, so acts as to bend or twist the spike pulled with it, and thereby renders the same unfit for re-use; but my invention, by drawing such spike directly upward for all its length, preserves the shape of the same, and leaves it in as good condition for re-use as when first driven into the tie.

The figure herewith shown is a view of my invention when in position for use. 1 is a lever, and when in position for use has its fulcrum at 2. The lower arm of the lever is a half circle with 2 as its true axis. At 3 is attached to said lever, preferably a chain with short links, and on the unattached, or lower end of said chain, is fastened a clutch that is so shaped as to engage and securely hold the head of the spike to be pulled. 4 is the frame in which such lever works, and holds it in position when in operation.

When said improvement is placed in position for its intended use and the clutch above mentioned is so placed as to engage the spike to be pulled, then the long end of the lever should be moved so as to bring a strain on the chain. As the chain moves upward, the spike must move with it. The half-circle on which the chain rests keeps the chain pulling always in the same direction, which at all times lifts the spike in the same direction, and thus removes it from the tie without bending it or in any way changing its form, and such spike can be-again used as in the first instance.

I claim:

1. In a device of the class described, a standard provided at its upper end with a lateral arm adapted to "rest upon the top of the rail, a lever pivoted on the standard and provided with a semi-circular head extending toward the outer end of said arm, a chain attached to the upper end of said semi-circular head and adapted to run upon the periphery thereof, said chain being pro vided with a spike clutch at its lower end,

for the purpose set forth.

of said arm, a chain attached to the upper end of said semi-circular head and adapted to run upon the periphery thereof, said chain being provided with a spike clutch at its lower end, for the purpose set forth.

THOMAS CORWIN CHAPMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.