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US Patent: 56,996
Wrench
Improvement in Wrenches
Patentees:
Frank Favro - Worcester, MA
A. Newton - Worcester, MA

USPTO Classifications:
81/169, 81/177.1

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Thomas H. Dodge
H. L. Fuller

Patent Dates:
Granted: Aug. 07, 1866

Patent Pictures:
Newton & Favro Pat. Aug. 7, 1866
USPTO pdf tiff
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Description:
The jaws are shown angled, but could be set at right angles to the shank; the adjusting knurl at the end of the handle is held in place with a set screw, and a second set screw provides a "limit stop" for the movable jaw. A washer between the adjusting knurl and shank reduces friction.

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