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US Patent: 172,155
Wrench
Patentee:
Oliver B. North - New Haven, CT

USPTO Classifications:
81/140, 81/177.1

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

Assignees:
O. B. North & Co. - New Haven, CT

Manufacturer:
O. B. North & Co. - New Haven, CT

Witnesses:
I. D. Weed
Lucius H. Prindle
Clara Broughton
J. H. Shumway

Patent Dates:
Applied: Dec. 09, 1875
Granted: Jan. 11, 1876

Patent Pictures:
Oliver B. North Pat. January 11, 1876
USPTO pdf tiff
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Description:
The patent describes a wrench with a sliding movable jaw with a spring-loaded pawl engaging a rack on the main bar for adjustment. The loop end of the handle is formed to allow the jaw to be slid in place, and afterwards is expanded to keep the movable jaw from being removed. The parts are all to be made of malleable iron.

This is the first of two patents cited on malleable iron wrenches produced by O.B. North & Co. -- the other is no. 186,155, granted Jan. 9, 1877.

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