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US Patent: 141,289
Wrenches
Improvement in Screw-Wrenches
Patentee:
Andrew Partridge (exact or similar names) - Springfield, MA

USPTO Classifications:
81/176, 81/177.1

Tool Categories:
wrenches : nut wrenches
wrenches : wrench adjustment types : screw adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
C. Eugene Buckland
S. W. Doherty
T. A. Curtis
Patent Dates:
Applied: Mar. 19, 1873
Granted: Jul. 29, 1873

Patent Pictures:
Andrew Partridge Pat. July 29, 1873
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Description:
The adjusting worm is moved by an auxiliary collar and rod that resemble an adjusting screw.

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