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US Patent: 135,773
Pipe-Wrenches
Improvement in Pipe-Wrenches
Patentee:
William H. Burton - Selma, AL

USPTO Classifications:
81/111, 81/98

Tool Categories:
wrenches : alligator wrenches
wrenches : pipe wrenches

Assignees:
Andrew J. Collier - Selma, AL
William H. Burton - Selma, AL

Manufacturer:
Not known to have been produced

Witnesses:
Frank LaPorte
Jno. W. Roberts
C. H. Poole
H. J. Ferguson

Patent Dates:
Applied: Jul. 08, 1872
Granted: Feb. 11, 1873

Patent Pictures:
W.H. Burton Pat. Feb. 11, 1873
USPTO pdf tiff
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Description:
The movable jaw's adjustment is held by a set-screw. Adjustable alligator wrenches similar to this design are known, but they are unmarked and appear to be of much more recent manufacture.

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