US147251A

US147251A - Improvement in claw-bars

Info

Publication number: US147251A
Authority: US
Publication date: 1874-02-10
Anticipated expiration: 1891-02-10

Description

Yn. FEBENBAcK.

Claw-Bar's.-

Patented Feb. 10. 1874.

No. M7251.

M Inv/211,207.

Mw w

M. mw-

UNITED STATES PATENT (DEI-TOEo DANIEL EEEENBAOK, OE TOLEDO, OHIO, AssIGNOE OF ONEIIALF Ins EIGHT To WILLIAM II. BAKEP.

IMPROVEMENT IN CLAW-BARS.

Specification fermir'ng part of Letters Patent No. 147,251, dated February 10, 1874; application filed October 28, 1873*.

To all whom it may concern:

Beit known that I, DANIEL FERENBAOII., of Toledo, Ohio, have invented an Improved Glawdar, of which the following is a specification: I

Myinvention more especially' relates to clawbars of the class used for extracting railwayspikes. Its object is to produce a cheap, simple, and yet e'ective implement for doing this work; and the improvement consists in combining a prying-lever having a shoe with a rounded sole at one end, a claw or dog pivoted in the upper side of said shoe, and a spring acting on the under side of the rear ledge of the dog, to hold said cla w closed upon the shoe when the two are Ilot forced apart by external pressure, as hereinafter set forth.

In the accompanying drawing, which represents a side elevation of my improved tool, a bar, A, is shown as constructed with a shoe or wedge, B, made with a sharp edge and a rounded sole or heel, as shown, to give a rolling fulerum. A dog or claw, C, is pvoted at c to the upper side ofthe shoe, so as to be able to swing freely vertieall y on its pivot. A spring, D, on the bar bears against a shoulder, d, on the dog back of the fulcrum, and tends to press the dog down upon the shoe.

In operation, the workman holds the bar nearly vertical, and hooks the projecting lip of the dog over the head of the spike, drawing the bar toward him, so as to open the jaws of the claw, and allow the toe ofthe shoe to slip under the head of the spike on the Side Opposite the doe'. Then, by bearing down on the bar, the shoe forms a rolling fulcrum, upon which the bar rocks, and the spike is readily extracted.

The advantages of my improved construction are, that the shoe, having no projection on its sole, '.an readily be slid from and under the head of the spike. The dog being pivoted in the top of the shoe, the slotting ot the shoe is unnecessary, and, as the spring throws it positively and automatically into place, the workmans special attention to this operation is unnecessary.

, I do not broadly claim every combination of bar, dog, and spring, as this is not new. I know of no instance, however, ot' the combination of a rockin g shoe, a hinged dog, and 'a spring between the two to press them together.

In a claw-bz r, I claim as my invention- The combinet'on oi' the bar, the shoe having a rounded sole to form a rolling 'ulerum, the rocking dog pivoted on the upper side ot' the shoe, and the lifting-spring interposed between the bar and the projecting rear end of the dog, whereby the shoe and dog are always pressed toward each other, these members being constructed and operating as and for the purpose described.

In testimony whereof I have hereunto snbscribed my name.

'DANIEL FEREBAOK.

VJ itnesses:

WAGER SWAYNE, 'FRANK B. SwAYNI-i.