US1181637A - Shears. - Google Patents

Description

J. H. BOYE.

SHEARS.

APPLICATION FILED 1AN.23, 1915.

Patented May 2, 1916.

D STATES PATENT OFFCE.

JAMES H. BOYE, OF CI-IIOAGO, ILLINOIS, ASSIGNOR TO THE BOYE NEEDLE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SHEARS.

Specfication of Letters Patent.

Patented May 2, 1916.

To all whom it may concern:

Beit known that I, JAMES H. BOYE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Shears, of which the following is a specification.

This invention pertains particularly to means for causing the cutting edges of shears, or scissors, to contact closely at the cutting point as the cutting point shifts in the cutting operation.

The primary Object is to provide simple and inexpensive means for effectively accomplishing the purpose indicated.

The invention is illustrated, in its preferred embodiment, in the accompanying drawing, in which- Figure 1 represents a plan view of a pair of shears constructed in accordance with the invention; Fig. 2, a broken inner face view of one of the blades, showing it equipped with a yielding cam, the dotted lines indicating the companion-blade in open condition; and Fig. 3, a broken sectional view taken as indicated at line 3 of Fig. 2.

Referring to Figs. 1 to 3, A and B represent the blades of a pair of shears, connected by a pivot 1. The blade A, in the illustration given, is provided at its inner surface with a recess 2 which accommodates a yielding cam 3, preferably composed of a lea-fspring which conforms loosely to the socket or recess 2. By preference, the recess 2 is elongated in the direction of the length of the blade, and the pivot 1 extends through the front portion of the spring. The spring is additionally secured, by a rivet 4, which passes through the front end of the spring and through the blade.

The rear portion of the member .3, that is that portion which lies back of the blade B when said blade is disposed cross-wise of the blade A, as indicated by the dotted lines in Fig. 2, is bent or curved away from the socket 2, thus affording a yielding cam over which the shank 5 of the blade B will ride in the closing operation.

comes of this patet may be obtained for The pivotal connection may be somewhat loose (generally being naturally thus), so that when the blades are wide open they will move with perfect freedom. In the closing operation, the back-edge 5 of the shank 5 of the blade B will first encounter the raised portion of the spring, so that the yielding cam will both raise the rear edge of the blade and depress the cutting edge and also tilt the blade on a transverse aXis. That is, the blade will be tilted about the longitudinal axis a b as well as about the transverse aXis c d. Thus, the cutting edges 6 of the blades are. thrown into the closest contact at the continuously-shifting cutting-point, in a most eiiective manner, while the operation is free and easy. The result is that even the most delicate and fiimsy materials may be sheared with absolute "ease. Moreover, the tenclency is for the blades to continually resharpen themselves because of the manner in which they slide past each other in the cutting operation, which affords no opportunity for the fabric to work between the blades. If desired, the point 3 of the yielding cam 3 may be 'the highestpoint of the cam, so that the tendency to tilt the blade about its longitudinal aXis will continue during the complete operation of the closing of the blades. In the construction described, the blades may be bowed moderately lengthwise, as is customary.

What I regard as new and desire to secure by Letters Patent is The combination of a pair of pivotally connected Shear-blades, one of said blades having a recess at its inner surface through which the pivot eXtends, a spring confined in said recess and through which the pivot eXtends, the rear end-portion of said spring being bent away from the socket and having. a high point at one rear corner portion thereof, and a. rivet securing the front end of said spring in said recess.

v JAMES H. BOYE.

In presence of* A. C. FIsoHER, N. B. DEARBORN.

five cents each, by addressing the "commltioe' of Imaam Washington, D. c."

Images