US325291A - Shears for metal-workers - Google Patents

Shears for metal-workers Download PDF

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US325291A
US325291A US325291DA US325291A US 325291 A US325291 A US 325291A US 325291D A US325291D A US 325291DA US 325291 A US325291 A US 325291A
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Prior art keywords
shears
metal
workers
jaws
cutting
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US case filed in California Central District Court litigation Critical https://portal.unifiedpatents.com/litigation/California%20Central%20District%20Court/case/2%3A08-cv-01894 Source: District Court Jurisdiction: California Central District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D29/00—Hand-held metal-shearing or metal-cutting devices
    • B23D29/02—Hand-operated metal-shearing devices
    • B23D29/026—Hand-operated metal-shearing devices for cutting sheets

Definitions

  • Figure 1 represents a side view of my improved shears; Fig. 2, an edge view, and Fig. 3 a section on line 22, Fig.2.
  • This invention relates to an improvement in that class of shears commonly called metalworkers hand-shears.
  • Shears of this class are usually constructed with straight cutting jaws to cutstraight lines in sheets of metal; also there are what is known as circular-jawed hand-shears, for trimming or evening up the ends of sheetmetal pipes, or for cutting holes in sheet metal.
  • the curvature or circle in this class of shears is not on line with thehandle,and is objectionable and impracticable for their purpose.
  • the object of my invention is to overcome this objection; and it consists in the construc tion of the shears as I shall hereinafter describe.
  • the part A represents the one part, and B the other part, pivoted at C.
  • the part A is provided with two cuttingjaws, (ta, which are in aline with the handle.
  • the jaws a a are curved opposite from ordinary shears.
  • the part B is provided with a single cuttingjaw, b, with more curvature than the double jaws a a and terminates in a point, D, which is extremely sharp or pointed.
  • the jaw b has a gutter or concavity running the length of its inner surface,so it can be readily and easily sharpened,
  • a setscrew, E which has a collar,c.
  • the object of the screw is to keep the two ends from spreading apart when the shears are in use. Should there be occasion to sharpen the s ears, the screw E can be readily tightened to draw more closely the double jaws.
  • the collar or shoulder formed on the screw E is filed or pared down, so as to permit the two jaws to be drawn more closely together after the shears are sharpened to admit of their being closed so their sharp cutting-edges will come closely in contact and not spread.
  • the jaw b is beveled on both sides for lightness, and may be employed as an edging-tool.
  • the mode of operating or using the shears is as follows: The pointed part D of the single jaw I) is inserted in the metal to be cut, by asingle blow. Then the operator cuts the metal in two pieces (a pipe for instance) without using a chisel or hammer.
  • This improved cutter avoids a great waste of metal, and avoids the occasion of smoothing or rounding up either end of the two out pieces, which has to be done when the chisel is employed. These shears will be found very convenient in cutting pipes and like articles.

Description

(No Model.)
W. L. WARNER.
SHEARS FOR METAL WORKERS.
No. 325,291. I
Patented Sept. 1, 1885.
'F W WWW/1.4% AMM.0W2JZL 7V 'Wfigmnfw n, PETERS, Pholo-Liflngnphur. Wanhin UNITED STATES PATENT OFFICE.
\VILLIAM L. \VARNEB, OF NEIV HAVEN, CONNECTICUT.
SHEARS FOR METAL-WORKERS.
SPECIFICATION forming part of Letters Patent No. 325,291, dated September 1, 1885.
Application filed May 23, 18F5.
To all whom it may concern:
Be it known that I, WrLLL-iu L. WARNER, a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Hand Shears for Metal-Workers; and I do declare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanyingdrawings, and to the let ters and figures of reference marked thereon, which form a part of this specification.
Figure 1 represents a side view of my improved shears; Fig. 2, an edge view, and Fig. 3 a section on line 22, Fig.2.
This invention relates to an improvement in that class of shears commonly called metalworkers hand-shears.
Shears of this class are usually constructed with straight cutting jaws to cutstraight lines in sheets of metal; also there are what is known as circular-jawed hand-shears, for trimming or evening up the ends of sheetmetal pipes, or for cutting holes in sheet metal. The curvature or circle in this class of shears is not on line with thehandle,and is objectionable and impracticable for their purpose.
The object of my invention is to overcome this objection; and it consists in the construc tion of the shears as I shall hereinafter describe.
A represents the one part, and B the other part, pivoted at C. The part A is provided with two cuttingjaws, (ta, which are in aline with the handle. The jaws a a are curved opposite from ordinary shears. The part B is provided with a single cuttingjaw, b, with more curvature than the double jaws a a and terminates in a point, D, which is extremely sharp or pointed. The jaw b has a gutter or concavity running the length of its inner surface,so it can be readily and easily sharpened,
(No model.)
making its cutting qualities more efficient. Between the two jaws a a at their ends is a setscrew, E, which has a collar,c. The object of the screw is to keep the two ends from spreading apart when the shears are in use. Should there be occasion to sharpen the s ears, the screw E can be readily tightened to draw more closely the double jaws. The collar or shoulder formed on the screw E is filed or pared down, so as to permit the two jaws to be drawn more closely together after the shears are sharpened to admit of their being closed so their sharp cutting-edges will come closely in contact and not spread. The jaw b is beveled on both sides for lightness, and may be employed as an edging-tool.
Any desired curvature may be given to the jaws without departing from the spirit of the invention.
The mode of operating or using the shears is as follows: The pointed part D of the single jaw I) is inserted in the metal to be cut, by asingle blow. Then the operator cuts the metal in two pieces (a pipe for instance) without using a chisel or hammer.
This improved cutter avoids a great waste of metal, and avoids the occasion of smoothing or rounding up either end of the two out pieces, which has to be done when the chisel is employed. These shears will be found very convenient in cutting pipes and like articles.
I do not wish to be understood as broadly claiming a pair of shears with pointed ends and having concave cuttingedges, as such, I am aware, is not new.
\Vhat I claim, and desire to secure by Letters Patent, is
In combination with the jaws a a, a setscrew and collar, for the purpose set forth.
In testimony whereof I affix my signature in presence of two witnesses.
\VILLIAM L. IVARNER. iVitnesses:
LUoIUs P. DENNIS, WM. H. ELY.
US325291D Shears for metal-workers Expired - Lifetime US325291A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442424A (en) * 1944-10-03 1948-06-01 Francis L Mcgary Center cut shear
US2766526A (en) * 1954-07-23 1956-10-16 Arthur A Pape Metal shears
US4007523A (en) * 1975-06-09 1977-02-15 Bianco Archangel J B-X cable pliers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442424A (en) * 1944-10-03 1948-06-01 Francis L Mcgary Center cut shear
US2766526A (en) * 1954-07-23 1956-10-16 Arthur A Pape Metal shears
US4007523A (en) * 1975-06-09 1977-02-15 Bianco Archangel J B-X cable pliers

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