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US Patent: 118,141
Wrench
Patentee:
Allen P. Lord - Friendship, NY

USPTO Classifications:
81/132, 81/97

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

Assignees:
Allen P. Lord - Friendship, NY
James E. Wisner - Friendship, NY

Manufacturer:
Unknown

Witnesses:
J. E. Wisner
S. P. Morse
Victor Hagmann
A. C. Rawlings

Patent Dates:
Granted: Aug. 15, 1871

Patent Pictures:
Allen P. Lord patent Aug. 15, 1871 with PATD AUG 71 - photo copyright & courtesy Martin J. Donnelly mjdtools.com
USPTO pdf tiff
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Description:
A short length of rack teeth on the base of the movable jaw engages rack teeth on the face of the main shank. A set screw secures the adjustment. The rocking portion of the movable jaw has an elongated slot to allow for rocking motion. A spring attached to the base of the movable jaw provides pressure to hold the rocking jaw either "open" or "closed" as it presses against the rocking jaw just in line with or slightly "below" the pivot pin.

A known example appears to be at least partially hand forged, and is stamped with the patent date.

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