US539525A

US539525A - Shears or snips

Info

Publication number: US539525A
Authority: US
Publication date: 1895-05-21
Anticipated expiration: 1912-05-21

Description

(No Model.)

A 0. P; LYON. sHEARs 0R sNIPs.

No. 539,525. Patented Maj 21, 1895.

. UNITED STATESr PATENT OFFICE.

OLIVER P. LYON, OF BALTIMORE, MARYLAND.

SHEARS OR SNIPS.

SPECIFICATION forming part of Letters Patent No. 539,525, dated May 21, 1895.

Application iild November 9,1894. Serial No. 528,357. (No model.)

To a/ZZ whom, t may concern:

Be it known that I, OLIVER P. LYON, a citizen of the United States, residing at the city of Baltimore, State of Maryland, have invented certain new and useful Improvements in Shears or Snips; and I 4do hereby declare the following to be a full, clear, and exactv description of the invention, such as willen-y able others skilled in the art to which it appertains to make and use the same. A

My invention is directed more particularly to that class of shearing implements designed for cutting sheet metal or the like, and which are technically known as snips. Previous to my invention,`the employment of these implements in making irregular cuts in the metal, as in circular or scroll work, has been attended with great diculties owing to the inability to readily follow a sinuous line, and owing to the burr which is formed on each side of the cut; and furthermore in the implement as ordinarily constructed it is impossible by reason of its blunt4 ends to make a finished or clean cutin corners of the metal which are'usually formed by angular bends therein.

It is the object of my invention to produce an implement of this character, by which all of these difculties are eftectually overcome; and to this end my invention consists in providing each of the blades of the implement with a convex back, and in curving the outer side of the front; and also in tapering the blade from the fulcrum to the toe,which latter is left sharply pointed.

I will now describe in detail my improved implement, and in connection with this description attention is called to the accompanying drawings which form a part of this speciiication, and in Which- Figure l is a side elevation of the implement, and Fig. 2 is an enlarged cross-sectional view taken on line a' m of Fig. 1.

Referring to the said drawings by letter A, A, denote the handles of the implement.

B, B, are the blades, and c is the pivot or fulcrum. From this pivot or fulcrum point each blade is tapered gradually to the toe d which latter is sharply pointed to facilitate the entrance of the toe Within the edge of the metal, and to enable the toes to enter and make a clean finished cut in corners of the metal formed for instance by an angular bend in the metal or an anguiar joint made between two pieces Yof metal. each of the vblades is convex in shape, the curve being preferably circular and extending from the cutting edge e to the outer edge f. The front or face b of the blade is straight 'to a point designated by the letter ly, and from this point to the outer edge f the blade `is made convex as shown. By reason of these convex surfaces the blades arepermitted to readily follow any line whether continuous, irregular or sinuous, and to make the cut clean and free from burrs or fractured edges.

The edges of the cut moreover are raised or nating in sharp toes, and formed with a con'- vex back, and a front or face convex at its outer si'de substantially as and for 'the purpose set forth.

OLIVER P. LYON.

Witnesses:

THos. M. DOBBIN, GEO. W. WARD.

The vback b of.