US141047A

US141047A - Improvement in shoemakers pinchers

Info

Publication number: US141047A
Authority: US
Publication date: 1873-07-22
Anticipated expiration: 1890-07-22

Description

WILLIAM H. HANNA, OF CHICO, CALIFORNIA.

IMPROVEMENT IN SHOEMAKERS PINCHERS.

Specification forming part of Letters Patent No. l4l,04'7,dated July 22, 1873 application filed May 10, 1873.

' California, have invented a new and useful Improvement in Shoemakers Pinchers, of which the following is a specification:

My invention consists of certain modifications in the form and construction of shoemakers pinchers, as hereinafter described, by which it is designed to obtain a stronger hold of the upper for stretching it over the last for lasting it, a greater rangeof movement, and greater leverage for operating it.

The drawing is a side elevation of my improved shoemakers pinchers.

In the first place I shorten the distance considerably between the ends of the jaws and the pivot A to secure greater power of gripe in the jaws, and I extend the lever B considerably beyond the end of the handle 0 for the same purpose. Next, I apply the projection D to the under side of the lever, the jaws to act as a fulcrum against the last, and thus preserve as large a range of movement as is afl'orded by the ordinary instruments with much longer jaws; and, finally, I arrange the jaws and the upper lever in about the same plane, so that the line of draft will coincide, or nearly so, with the lever by which it is produced.

By these improvements I have no difficulty in drawing the upper as close to the last as I Wish, which cannot always be done with the ordinary pinchers. I also avoid the slipping off of the tool in cases of unusual strain, common to the ordinary tool. By the arrangement of the line of the jaws and that of the lever B alike, as above described, the lower handle will not come in contact with the last, as the other often does, before the leather is sufficiently strained. My instrument is not so liable to tear the leather nor hurt the hand.

Having thus described my invention, I claim as new and desire to secure by Letters Patent A pair of shoemakers pinchers having the jaws in the same longitudinal plane and the teeth abutting against the turning-face of the jaws, so as to bring the bite near to the pivot A, and thereby not only to secure more leverage in the gripe, but thus to enable the upper to be drawn close to the last, in the manner described.

WILLIAM HAMILTON HANNA.

Witnesses WM. DRAPER, B. B. BAKER.