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US Patent: 1,456,620
Wrench
Patentee:
George W. Cary - Greenfield, MA

USPTO Classifications:
81/99

Tool Categories:
wrenches : wrench adjustment types : self-adjust wrenches

Assignees:
None

Manufacturer:
Goodell-Pratt Co. - Greenfield, MA

Witnesses:
Unknown

Patent Dates:
Applied: Oct. 22, 1919
Granted: May 29, 1923

Patent Pictures: [ 1 | 2 | 3 ]
George W. Cary patent May 29. 1923
USPTO pdf tiff
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Description:
The swinging hook jaw is moved by a lever through a gear-tooth connection. A spring tends to hold the jaw closed.

Marketed as the CHAUFFEUR'S UNIVERSAL WRENCH. It was first brought to the market in early 1921.

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