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US Patent: 118,619
Improvement in Wrenches
Patentee:
James W. Mahlon - New York, NY

USPTO Classifications:
81/168, 81/177.1

Tool Categories:
wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. W. Coombs
R. T. Van Buskerck
Fred Haynes

Patent Dates:
Granted: Aug. 29, 1871

Patent Pictures:
James W. Mahlon Pat. Aug. 29, 1871
USPTO pdf tiff
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Description:
The handle turns and advances or retracts a stud attached to the movable jaw. This puts the handle in line with the the center of force on the jaws. The specifications note a similar structure could be used for a pipe wrench or pipe cutter.

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