Патент USA US2121247код для вставки
June 21, 1938. . R. o. HOOKER‘ SHEET METAL ‘ SHEARS 2,121,247 ' ' Filed July 30, 1937 ‘ ‘\9 ' INVENTOR P4)’ 0. HOOKEQ - ATTORNEY 2,121,247 Patented June 21, 1938 UNITED STATES PATENT OFFICE 2,121,247 SHEET‘ METAL SHEARS Ray 0. Hooker, Fairmont, Calif. Application July 30, 1937, Serial No. 156,544 1 Claim. (Cl. 30-25’7) 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 5 as to permit the severed metal to pass over the lower jaw of the shears, and under the operator’s hand without the hazard of injury to the hands. A further object of this invention is to provide tially 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 m 33 of the shears. The portion 32 lies against the portion I‘! of the member I2. The jaw 33 com prises a cylindrical portion 35 rotatably received Said jaw a strong, compact and rugged shears of the char- , within the counter-sunk opening 20. 10 acter described which shall be relatively inex pensive to manufacture, easy to assemble and manipulate, ‘safe in use, and practical and effi cient to a high degree. Other objects of this invention will in part be 15 obvious and in part hereinafter pointed out. The invention accordingly consists in the fea tures of construction, combinations of elements, and arrangement of parts which will be exempli ?ed in the construction hereinafter described, 20 and of which the scope of application will be in dicated in the following claim. In the accompanying drawing, in which is shown one of the various possible illustrative embodiments of this invention, 25 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 30 4—4 of Fig. 1. Referring now in detail to the drawing, l0 designates a sheet metal shear embodying the in vention, and comprising a pair of interpivoted members I! and I2, pivoted together on a bolt 35 I3. The member l2 has ahorizontal handle por tion 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 pro 40 jecting 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 open 45 ing 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 sur face 26 forming a continuation of the cylindrical 50 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. 55 The member I l comprises a handle 30substan has a through opening 36 co-axial with the open 10 ing 2|. The bolt I3 passes through said open ing 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 ?at horizontal 15 upper surface lit] in the plane of the axis of the openings 2|, 3B. Said surface 4|] has a trans verse groove 4| and the portion 32, has a counter sunk 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 con tinuation 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 ob viating the likelihood of injury to the operator’s hand. It will thus be seen that there is provided a de vice in which the several objects of this inven tion 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. 50 Having thus described my invention I claim as new and desire to secure by Letters Patent: Shears comprising a pair of interpivoted mem bers having handles, and jaws offset from said handles and provided with shearing edges, one of 55 2 2,121,247 said jaw having a cylindrical counter-sunk opening partially extending therethrough form ing a bearing surface having a base, the second jaw being formed with a cylindrical boss received Within said counter-sunk opening and bearing against said base, said ?rst jaw further having an offset portion formed with a part-cylindrical surface forming a continuation of the cylindrical surface of said counter-sunk opening, and. being 10 formed with a radial shoulder on one end of said part-cylindrical surface, the second jaw having a curved portion engaging said part-cylindrical surface, and a shoulder at the end of said curved portion adapted to contact said ?rst shoulder to limit relative angular movement of said mem bers, said jaws having co-axial through openings at the axes of said cylindrical opening and cylin drical boss, 2. bolt within said through openings, u 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 counter sink to receive the head of said bolt, upon in 10 serting said bolt into the through opening of said Jaw. RAY 0. HOOKER.