US178053A

US178053A - Improvement in nail-extractors

Info

Publication number: US178053A
Authority: US
Publication date: 1876-05-30
Anticipated expiration: 1893-05-30

Description

M. H. FRANK.

NAIL-EXTRACTOR.

No.178,053.' Patented ma 30,1876.

Fly-2.

I a (6% I Nv PETERS, PHOTO-LITHOGRAPHER, WASHINGTON D C UNITED STATES- PATENT OFFICE.

MARTIN H. FRANK, OF JERSEY CITY, J ASSIGNOR OF PART OF HIS RIGHT TO TIMOTHY MULGAHY AND EDWARD OBRIEN, OF SAME PLACE.

IMPROVEMENT IN NAIL-EXTRACTO RS.

Specification forming part of Letters Patent No. 178,053, dated May 30, 1876; application filed April 3, 1876.

To all whom it may concern: 7

Be it known that I, MARTIN H. FRANK, of Jersey City, 'in the county of Hudson and State of New Jersey, have invented a certain Improvement in Grow-Bars, of which the following is a specification:

y This invention relates more especially to that kind of crow-bars which are used for extracting railroad-spikes or large nails; and it consists in the combination of a crow-foot with a bar having a toe formed on it, said crow-foot being attached to the lower end of the bar by means of a swivel, While the toe is formed on the bar near the swivel.

Figure 1 is a plan of a crow-bar constructed according to my invention. Fig. 2 is a side view of the same, partly in section, and-showin g the toe in two positions.

A is the bar, the upper end of which is formed in the-ordinary way,w' h'ile its lower end is bored out longitudinally a certain depth, to receive the shank of the crow-foot B. The shank D, formed at one end of said crow-foot, is made to fit the hole in the lower end of the bar A, so that the former can turn freely within the bar. Tou keep the crow-foot from coming out of the bar, a pin, a, is passed, transversely through the bar, so that said pin will enter a circular groove, 1), made around the shank D. The other end of the crow-foot is made in the ordinary form. E is the toe formed near the lower end of the bar, projecting from the latter at an angle, and is. made for the purpose of serving as a fulcrum for a lever of the first order.

The operation of extracting spikes or large nails'by a crow-bar thus constructed is as follows: The crow-foot is first passed under the head of the spike or nail, while the bar is in a position that the toe E projects upward, as

shown in full lines in both figures, tillthe spike or nail is started, when the bar is turned I so that the toe E projects downward, as shown in dotted lines in Fig 2, thus forming a fulcrow-foot B, of the bar A and toe E, substantially as and for the purpose herein described.

, MARTIN H. FRANK.

Witnesses:

ALBERT F. SGHLEGEL, CHARLES STIEE.