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US Patent: 564,816
Wrench
Patentees:
Robert Aldrich (exact or similar names) - Millville, MA
John V. Chamberlin (exact or similar names) - Worcester, MA

USPTO Classifications:
81/153

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
E. M. Healy
Louis W. Southgate
W. J. Baldwin
Chas. F. Schwelz

Patent Dates:
Applied: Nov. 18, 1895
Granted: Jul. 28, 1896

Patent Pictures:
Robert Aldrich and John V. Chamberlin patent July 28, 1896
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Description:
A spring-tensioned wedging roller holds the adjustment. Although the drawing shows application to a nut wrench, the specifications note the adjusting means could also be applied to pipe wrenches.

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