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US Patent: 516,591
Wrench
Patentee:
John F. Cook (exact or similar names) - St. Louis, MO

USPTO Classifications:
81/160

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Edward W. Farrell
H. S. Strite
C. D. Moody
Patent Dates:
Applied: Jan. 04, 1894
Granted: Mar. 13, 1894

Patent Pictures:
John F. Cook patent March 13, 1894
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Description:
Interrupted thread structure so that a quarter turn of the handle will hold or release the adjustment.

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