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US Patent: 9,567
Improved Screw-Wrench
Patentee:
George B. Read - New York, NY

USPTO Classifications:
81/126, 81/135

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

Assignees:
None

Manufacturer:
G. B. Read - New York, NY

Witnesses:
A. D. Munn
S. H. Wales

Patent Dates:
Granted: Feb. 01, 1853

Patent Pictures: [ 1 | 2 ]
George B. Read patent Febr. 1, 1853
USPTO pdf tiff
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Description:
The title is misleading; the adjusting means is a spring-loaded pawl engaging a rack. The jaws tighten as pressure is applied to the handle. "Reverse" pressure on the handle relaxes the pawl to allow for jaw adjustment.

Ken Cope's "American Wrench Makers 1830-1930" lists Read as manufacturer of this wrench.

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