US130184A

US130184A - Improvement in shears

Info

Publication number: US130184A
Authority: US
Publication date: 1872-08-06
Anticipated expiration: 1889-08-06

Description

W. BRAlTHWAITE.

Improvement in Shears.

No. 130,184. Patented Aug. 6,1872.

Fig.1 4 Fig.2,

Fig, 5,

Witnesses M. Maw-u mam/1 PHIL m M K 1 nsa m/us's M 0055 s, j

PATENT OFFICE.

WILFRED BRAITHWAITE, OF WATERBURY, CONNECTICUT.

IMPROVEMENT IN SHEARS.

Specification forming part of Letters Patent No. 130,184, dated August 6, 1872.

To all whom it may concern:

Be it known that I, WILFRED BRAITH- WAITE, of Waterbury, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Shears; and that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing and to the letters of reference marked thereon making a part of this specification.

Figure l of the drawing represents an external view of my shears. Fig. 2 is a sectional view, showing the socket and mode of connecting the shear-blades; and Figs. 3, 4, and 5 are details.

This invention has relation to the manufacture of shears having blades separable from the handles and it consists in the construction and novel arrangement of the socket in the handle, and the beveled and shouldered tenon of the blade, whereby a neat, compact, and strong joint is formed.

In the accompanying drawing, the letter A designates the handle, which includes the shank and bow. The shanks are mortised in the ends at a, and the mortises are made deep and wide to receive tangs nearly as broad as the blades. The inner wall of each mortise is beveled from its bottom to the edge to receive and fit closely the beveled face of the tang. This inner wall of the mortise is beveled down to a thin edge, which is cut out in the middle to fit the screw or rivet d, as shown in the drawing. The blade 0 is provided with a broad, flat extension or tang, 0, having at each side beveled shoulders, and having its inside face beveled toward the end of the tang, to fit the beveled wall of the mortise a, as above described. When the blades are put into place in the mortises of the shanks the screw or rivet (l is inserted and serves to hold the blade and shank together. This rivet passes through the metal of the outside wall of each mortise and through the blades, the inside wall of each mortise being beveled off and cut away down to the rivet, as above described, so that the hard metal surfaces of the blades may be brought together at this point to sustain the wear and the pressure against the cuttingedges. The beveled form of the tang and its socket enables them to be brought into the closest contact, which is essential in instru ments of this character. The tang'is a broad and flat extension of the blade, which has its metal disposed to the best advantage for resisting the strain, while it is not rendered necessary to make the shank at the socket much thicker than these parts are in ordinary pair of scissors or shears. Attention is especially directed to the fact that the pivot-screw is designed to pass through both tang and mortise The shears constructed with separable blades, each having abroad, flat, tapering tang, beveled on its inner side, and with shanks, each having a mortise with a beveled inner wall, the pivot-screw of the shears passing through the tangs, as specified.

' WILFRED BRAITHWAITE.

Witnesses:

ANsoN F. ABBOTT, E. FANCHER.