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US Patent: 1,380,794
Monkey Wrench
Patentee:
William Gordon - Union, NJ

USPTO Classifications:
81/139

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

Assignees:
None

Manufacturer:
Gordon Automatic - Union, NJ

Witnesses:
Angelo Caponegro
Edward Hollander

Patent Dates:
Applied: Oct. 20, 1919
Granted: Jun. 07, 1921

Patent Pictures: [ 1 | 2 ]
William Gordon Patent June 7, 1921
USPTO pdf tiff
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Description:
The quick-adjust action uses multiple toothed "levers" that engage a rack on the sliding jaw. Each of the "levers" has a slightly different length from the common pivot point. The movable jaw is pulled into engagement by the interior tension spring, and the tooth on the lever closest to the final position engages the rack tooth to hold the adjustment.

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