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US Patent: 30,987
Improvements in Wrenches
Patentee:
Ezra Ripley - Troy, NY

USPTO Classifications:
81/154

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
L. Stone
J. J. Savage

Patent Dates:
Granted: Dec. 18, 1860

Patent Pictures:
Ezra Ripley Pat. Dec. 18, 1860
USPTO pdf tiff
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Description:
The sliding jaw is held in position by a set screw which operates against a wedge-shaped slot cut in the back of the main shank. The wedge is deeper toward the fixed head, so strain on the movable jaw tightens the grip of the setscrew.

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