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US Patent: 309,389
Wrench
Patentee:
William P. Heffron (exact or similar names) - Chicago, IL

USPTO Classifications:
81/136

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Frank S. Blanchard
M. J. Clagett
Louis Nolting
Patent Dates:
Applied: Apr. 21, 1884
Granted: Dec. 16, 1884

Patent Pictures:
William P. Heffron patent December 16, 1884
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Description:
The sliding jaw's adjustment is held by a pawl and rack.

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