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US Patent: 242,130
Wrench
Patentee:
Seth E. Hurlbut - Chicago, IL

USPTO Classifications:
81/120, 81/185.1, 81/186

Tool Categories:
wrenches : alligator wrenches

Assignees:
None

Manufacturer:
Universal Wrench Co. - New York, NY

Witnesses:
O. W. Bonds
H. F. Bruns
Jas. A. Cowles
Frank Sayre Osborne

Patent Dates:
Applied: Oct. 16, 1880
Granted: May 31, 1881

Patent Pictures:
Seth E. Hurlbut patent May 31, 1881
USPTO pdf tiff
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Description:
The wrench has insertable hard faces on both jaws. A variety of insertable teeth are presented. The specifications note that large sizes would work as rail-car movers.

A known example has a set of insertable teeth held in place by a set screw. It is marked UNIVERSAL WRENCH 101 BOWERY N.Y. PAT. MAY 31, 1881

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