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US Patent: 385,366
Wrench
Patentee:
Joseph P. Mitchell - New Bedford, MA

USPTO Classifications:
81/169

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Fred. A. Mason
A. C. Fuller
Frank Jones
Andrew F. Mitchell

Patent Dates:
Applied: Mar. 22, 1888
Granted: Jul. 03, 1888

Patent Pictures:
Joseph P. Mitchell patent July 3, 1888
USPTO pdf tiff
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Description:
The wrench adjusts by turning the end of the handle. The movable jaw has a squared shank sliding in a squared recess in the frame of the fixed jaw. The main focus of the patent is for the tube that extends through the base of the fixed jaw, the tube's connection to the adjusting handle, and related features. The jaws have flat and obtuse angle sides for square and hexagonal nuts.

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