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US Patent: 178,833
Wrench
Patentee:
Walter Britton - Elmore, IL

USPTO Classifications:
81/134

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. McCallum
L. Van Riswick
Jno. Doyle
Sylvester Cravens

Patent Dates:
Applied: Feb. 01, 1876
Granted: Jun. 20, 1876

Patent Pictures:
Walter Britton Pat. June 20, 1876
USPTO pdf tiff
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Description:
The movable jaw has a "pawl" overlying a spring, that engages a rack to hold the position of the movable jaw. The specifications do not make clear how the pawl & spring would disenage to open the jaws.

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