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US Patent: 171,935
Wrench
Patentee:
William Hawkins (exact or similar names) - Birmingham, CT

USPTO Classifications:
81/171

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Chas. E. Clark
Wm. S. Browne
Clara Broughton
J. H. Shumway

Patent Dates:
Applied: Nov. 30, 1875
Granted: Jan. 11, 1876

Patent Pictures:
William Hawkins Pat. January 11, 1876
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Description:
The movable jaw adjusts by a conventional looking side-screw, except that the base of the screw has a gear, connecting to another gear on the handle. The handle turns to drive that gear. The gear ratio provides more turning force to the adjusting screw.

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