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US Patent: 454,678
Wrench
Patentee:
Michael Cummins (exact or similar names) - New York, NY

USPTO Classifications:
81/143

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
W. S. Duvall
E. M. Gallaher
Richard Corr
John McKibbin
Patent Dates:
Applied: Oct. 13, 1890
Granted: Jun. 23, 1891

Patent Pictures:
Michael Cummins patent June 23, 1891
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Description:
A lever on the movable jaw with an eccentric pivot engages and loosens a clamping block to hold the adjustment.

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