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US Patent: 328,601
Pipe Wrench
Patentee:
George F. Newell - Boston, MA

USPTO Classifications:
81/90.9

Tool Categories:
wrenches : alligator wrenches

Assignees:
George F. Newell - Boston, MA
Stiles Frost - Newton, MA

Manufacturer:
Not known to have been produced

Witnesses:
W. B. Masson
L. C. Hills
Chas. M. Reed

Patent Dates:
Applied: Sep. 13, 1884
Granted: Oct. 20, 1885

Patent Pictures:
George F. Newell patent October 30, 1885
USPTO pdf tiff
Google Patents
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Description:
The set screw adjusts the size of the opening between the jaws, and the lip on the longer jaw transmits extra biting force as force on the handle is increased.

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