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US Patent: 41,768
Nut Wrench
Patentee:
George W. Griswold - Abington, PA

USPTO Classifications:
81/153

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. Stark
John R. Kesley

Patent Dates:
Granted: Mar. 01, 1864

Patent Pictures:
George W. Griswold Pat. Mar. 1, 1864
USPTO pdf tiff
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Description:
The movable jaw has an internal spring-loaded roller that wedges against the back of the bar to hold the adjustment. The back of the movable jaw has an opening to reach in to release the roller.

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