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US Patent: 13,597
Improvement in Wrenches for Turning Screw-Nuts
Patentee:
Henry J. Behrens - New York, NY

USPTO Classifications:
81/140, 81/150

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

Assignees:
None

Manufacturer:
J. NEILL - unk., unk.

Witnesses:
Jacob Hatzel, Jr.
J. C. Greenough

Patent Dates:
Granted: Sep. 25, 1855

Patent Pictures: [ 1 | 2 ]
Henry J. Behrens patent September 25, 1855
USPTO pdf tiff
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Description:
The adjustable jaw has a toothed eccentric cam held in contact to the wrench bar by a spring, and with a thumb lever to release the grip. The pivot pin of the eccentric extends past the side to serve as a grip to position the movable jaw.

A wrench matching this design is marked "J NEILL PAT SEPT. 25, 1855."

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