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US Patent: 132,789
Improvement in wrenches
Patentee:
Quimby S. Backus (exact or similar names) - Millers Falls, MA

USPTO Classifications:
81/152, 81/177.1

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

Assignees:
None

Manufacturer:
Unknown

Witnesses:
A. N. Marr
D. P. Abercombie
Frank L. Ourand
C. L. Evert

Patent Dates:
Granted: Nov. 05, 1872

Patent Pictures: [ 1 | 2 ]
Quimby S. Backus Pat. Nov. 5, 1872
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Description:
"The nature of my invention consists in the construction and arrangement of a wrench, in which the movable jaw is held in place by friction produced by operation on the object..."

See the writeup on Backus accompanying patent 132,791.

A wood-handled example appeared in an October, 2012 Martin J. Donnelly auction, and an all-steel example with angled jaws appeared in a March 22, 2014 Donnelly auction.

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