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US Patent: 455,225
Wrench
Patentee:
William F. Mercer (exact or similar names) - Columbus, OH

USPTO Classifications:
81/136

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

Assignees:
William F. Mercer - Columbus, OH
John F. Pfeifer - Columbus, OH

Manufacturer:
Not known to have been produced

Witnesses:
E E. Bragg
J. H. Fravel
C. C. Shepherd
Barton Griffith
Patent Dates:
Applied: Oct. 08, 1890
Granted: Jun. 30, 1891

Patent Pictures:
William F. Mercer patent June 30, 1891
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Description:
A spring in the end of the handle opens the jaw. A spring-loaded lever with teeth engages rack teeth on the shank to hold the adjustment.

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