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US Patent: 232,923
Wrench
Patentee:
Alfred Beard - Cincinnati, OH

USPTO Classifications:
81/179, 81/53.2

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
C. Sedgwick
F. McArdle
I. F. Schmitt
S. P. Schmitt

Patent Dates:
Applied: Aug. 07, 1880
Granted: Oct. 05, 1880

Patent Pictures:
Alfred Beard patent October 5, 1880
USPTO pdf tiff
Google Patents
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Description:
The common feature in the variants is the wedge-shaped piece with teeth that will tighten their grip as pressure is applied.

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