US156775A - Improvement in bolt-cutters - Google Patents

Improvement in bolt-cutters Download PDF

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US156775A
US156775A US156775DA US156775A US 156775 A US156775 A US 156775A US 156775D A US156775D A US 156775DA US 156775 A US156775 A US 156775A
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Prior art keywords
lever
bolt
cutting
cutters
jaw
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B17/00—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact
    • B26B17/02—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact with jaws operated indirectly by the handles, e.g. through cams or toggle levers

Definitions

  • myinvention consists in combining areversible jaw with the handle, stirrup, set-screw, and operating cam-lever of a bolt-cutter, as hereinafter more fully set forth.
  • Figure 1 represents a side view
  • Fig.2 a longitudinal section
  • Fig. 3 a view of one of the cutting jaws.
  • a and B represent two levers, which form the handles of the machine.
  • a stirrup, F On one end of lever B is formed a stirrup, F, at right angles to it and of suitable width to allow of the cutting-jaws working within it.
  • a cam Upon the end of lever A is a cam, and through this cam is a pivot which connects said lever with the upper ends of the stirrup F.
  • G represents two braces from lever B to upper ends of stirrup F.
  • the lever B, with its jaws F F and braces G G, are all made of one piece of metal.
  • 0 and D represent the cutting-jaws of the machine, both of which are pivoted to the lever B, but at different points, one being arranged over the other.
  • a represents a bent spring, which is located between the jaws O and D, and which presses them apart. Be tween the jaw O and the cam or lever A there is inserted a sliding metallic block, H.
  • the jaws O and D have each a cutting-edge, but the jaw D has at its back and opposite its out ting-edge a serrated head. The object of this serrated head is to hold the nut while the cutting-edge of jaw G cuts it.
  • the jaw D it will be seen, is reversible, so that two cutting-edges may come together, or one cutting-edge may out against the roughened square back.
  • 6 represents a set-screw, which passes into under side of the end of lever B and regulates the distance of jaw D from G, to compensate for the shortness of the cam or lever A.
  • the reversible jaw D in combination with handle B, stirrup F, set-screw e, and cam-lever A, substantially as and for the purposes set forth.

Description

UNITED STATES PATENT QFFIGE. 73
JAMES DAWSON, OF GREENWOOD, ILLINOIS.
IMPROVEMENT IN BOLT-CUTTERS.
Specification forming part of Letters Patent No. 156,775, dated November 10, 1874; application filed September 5, 1874.
To all whom it may concern Be it known that I, JAMES DAWSON, of Greenwood, inv the county of McHenry and in the State of Illinois, have invented certain new and useful Improvements in Bolt-Gutter; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification.
The nature of myinvention consists in combining areversible jaw with the handle, stirrup, set-screw, and operating cam-lever of a bolt-cutter, as hereinafter more fully set forth.
In the annexed drawings making part of this specification, Figure 1 represents a side view; Fig.2, a longitudinal section; and Fig. 3, a view of one of the cutting jaws.
In the figures, A and B represent two levers, which form the handles of the machine. On one end of lever B is formed a stirrup, F, at right angles to it and of suitable width to allow of the cutting-jaws working within it. Upon the end of lever A is a cam, and through this cam is a pivot which connects said lever with the upper ends of the stirrup F. G represents two braces from lever B to upper ends of stirrup F. The lever B, with its jaws F F and braces G G, are all made of one piece of metal. 0 and D represent the cutting-jaws of the machine, both of which are pivoted to the lever B, but at different points, one being arranged over the other. a represents a bent spring, which is located between the jaws O and D, and which presses them apart. Be tween the jaw O and the cam or lever A there is inserted a sliding metallic block, H. The jaws O and D have each a cutting-edge, but the jaw D has at its back and opposite its out ting-edge a serrated head. The object of this serrated head is to hold the nut while the cutting-edge of jaw G cuts it. The jaw D, it will be seen, is reversible, so that two cutting-edges may come together, or one cutting-edge may out against the roughened square back. 6 represents a set-screw, which passes into under side of the end of lever B and regulates the distance of jaw D from G, to compensate for the shortness of the cam or lever A.
By placing a bolt or other material to be out between the two cutting-edges of the jaws, the cutting is rendered very easy by the shortness or abruptness of the cam.
Having thus fully described my invention,
what I claim as new, and desire to secure by Letters Patent, is
The reversible jaw D, in combination with handle B, stirrup F, set-screw e, and cam-lever A, substantially as and for the purposes set forth.
In testimony that I claim the foregoing I have hereunto set my hand this 15th day of August, 1874.
JAMES DAWSON.
Witnesses:
J NO. A. WILsoN, JACOB WERTERMAN.
US156775D Improvement in bolt-cutters Expired - Lifetime US156775A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874465A (en) * 1957-10-04 1959-02-24 Sillak Joseph Sheet metal shears

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874465A (en) * 1957-10-04 1959-02-24 Sillak Joseph Sheet metal shears

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