US2121247A - Sheet metal shears - Google Patents

Description

June 21, 1938. R. o. HOOKER 2,121,247

. SHEET METAL SHEARS Filed July 30, 1937 INVENTOR P4) 0. HOOKEQ ATTORNEY Patented June 21, 1938 UNITED STATES PATENT OFFICE SHEET METAL SHEARS Ray 0. Hooker, Fairmont, Calif.

Application July 30, 1937, Serial No. 156,544

1 Claim.

This invention relates to sheet metal shears.

An object of this invention is to provide shears of the character described for cutting tin or the like sheet metal, and which shall be so constructed as to permit the severed metal to pass over the lower jaw of the shears, and under the operators hand without the hazard of injury to the hands.

A further object of this invention is to provide a strong, compact and rugged shears of the character described which shall be relatively inexpensive to manufacture, easy to assemble and manipulate, safe in use, and practical and efficient to a high degree.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements, and arrangement of parts which will be exemplified in the construction hereinafter described, and of which the scope of application will be indicated in the following claim.

In the accompanying drawing, in which is shown one of the various possible illustrative embodiments of this invention,

Fig. 1 is a side elevational view of sheet metal shears embodying the invention;

Fig. 2 is a top plan view of my improved shears;

Fig. 3 is a front end view of said shears; and

Fig. 4 is a cross-sectional view taken on line 44 of Fig. 1.

Referring now in detail to the drawing, l0 designates a sheet metal shear embodying the invention, and comprising a pair of interpivoted members I! and I2, pivoted together on a bolt I3. The member l2 has ahorizontal handle portion l5 provided with the usual loop l6 at the rear end thereof. Extending from the front end of the handle [5 is a downwardly curved portion from which there extends a forwardly projecting jaw I8 carrying the upper cutting blade of the shears. The jaw l8 has a portion l9 formed on one side thereof with a counter-sunk cylindrical socket 20. Said portion l9 has an opening 2| at the axis of the counter-sunk opening 20 through which the bolt l3 passes. The jaw l8 furthermore comprises a front cutting blade portion 23 having a lower shearing edge 25. Said portion 23 has a part cylindrical surface 26 forming a continuation of the cylindrical inner surface of the counter-sunk opening 20. At one end of the surface 26 is a radial shoulder 21 for the purpose hereinafter appearing, and located at the bottom of the jaw I8. At the other end of the surface 26 is a radial shoulder 28.

The member I l comprises a handle 30substantially parallel to the handle I5 and terminating at the rear with a loop 3| disposed above the loop l6. Extending downwardly from the front end of the handle is a portion 32, and extending forwardly from said portion 32 is the lower jaw 33 of the shears. The portion 32 lies against the portion I! of the member I2. The jaw 33 comprises a cylindrical portion 35 rotatably received within the counter-sunk opening 20. Said jaw has a through opening 36 co-axial with the opening 2|. The bolt I3 passes through said opening 36. The jaw 33 furthermore comprises a portion 31 having a. forwardly projecting cutting blade 38 formed with an upper shearing edge 39. Said portion 31 has a substantially flat horizontal upper surface it] in the plane of the axis of the openings 2|, 3B. Said surface 4|] has a transverse groove 4| and the portion 32, has a countersunk opening 39 co-axial with the opening 36, to receive the head |3a of the bolt 13. In as- 20 sembling the members H and I2, the head |3 may slide within the groove 4|.

A nut 45 may be screwed to the outer end of the bolt I3. The portion 32 of the member II] has a part-cylindrical surface 41 forming a continuation of the cylindrical surface of boss 35 and received within the part-cylindrical surface 26 of the jaw I8. At one end of the surface 41 is a radial shoulder 50 opposed to shoulder 21. At the other end of surface 41 is shoulder 41a adapted to cooperate with shoulder 28 to limit opening movement of the shears.

It will now be understood that as sheet metal is being sheared, the metal on one side of the cut may pass over the surface 40 of the lower jaw 33, and pass beneath the handles I5, 30, so as not to contact the hands of the operator, thus obviating the likelihood of injury to the operators hand.

It will thus be seen that there is provided a device in which the several objects of this invention are achieved, and which is Well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiment above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention I claim as new and desire to secure by Letters Patent:

Shears comprising a pair of interpivoted members having handles, and jaws offset from said handles and provided with shearing edges, one of 55 portion adapted to contact said first shoulder to limit relative angular movement of said members, said jaws having co-axial through openings at the axes of said cylindrical opening and cylindrical boss, 2. bolt within said through openings, one of said jaws being counter-sunk to receive the head of said bolt, said last mentioned jaw having an offset formed with a surface having a groove co-axial with said last mentioned countersink to receive the head of said bolt, upon inserting said bolt into the through opening of said aw.

RAY 0. HOOKER.

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