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US Patent: 79,642
Wrench
Improvement in Pipe-Tongs
Patentee:
James M. Evarts - New Haven, CT

USPTO Classifications:
81/129.5, 81/409

Tool Categories:
wrenches : pipe wrenches : pipe tongs

Assignees:
None

Manufacturer:
James M. Evarts - New Haven, CT

Witnesses:
Wm. F. McNamara
Alex. F. Roberts
W. C. Ashkettle
Wm. A. Morgan

Patent Dates:
Applied: Apr. 01, 1868
Granted: Jul. 07, 1868

Patent Pictures:
James M. Evarts Pat. July 7, 1868
USPTO pdf tiff
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Description:
The adjustment is made by loosening the thumb screw on the pivot bolt, which passes through a tapered pivot block with toothed edges that mesh with teeth in a serrated slot in one of the jaws. According to Ken Cope's "American Wrench Makers 1830-1930," Evarts produced this tongs at New Haven.

Evarts distinguishes his patent from J.R. Brown's Aug. 2, 1859 pipe tongs patent (no. 24,927).

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