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US Patent: 70,605
Improvement in wrenches
Wrench for Carriages and Other Purposes
Patentee:
Edward Perry - Hopkinton, MA

USPTO Classifications:
81/163, 81/73

Tool Categories:
wrenches : brace wrenches
woodworking tools : braces : brace chucks
wrenches : axle nut wrenches

Assignees:
None

Manufacturer:
Unknown

Witnesses:
Thomas H. Dodge
D. L. Miller

Patent Dates:
Granted: Nov. 05, 1867

Patent Pictures: [ 1 | 2 ]
Edward Perry patent Nov. 5, 1867
USPTO pdf tiff
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Description:
The jaws are adjusted by a single screw with a large center knurl, left-hand threads for one jaw, and right-hand threads for the other.

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