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US Patent: 377,795
Chain Wrench
James H. Williams - Brooklyn, NY

USPTO Classifications:

Tool Categories:
wrenches : pipe wrenches : chain and strap wrenches


J. H. Williams & Co. - Brooklyn, NY

George H. Botts
J. J. Kennedy
T. H. Palmer

Patent Dates:
Applied: May 23, 1887
Granted: Feb. 14, 1888

Patent Pictures:
James H. Williams patent February 14, 1888
USPTO pdf tiff
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Improvement to the "Brock" chain wrench (patent nos. 254,862 and 298,442). Reversible jaws to gain longer life from the parts, and stronger "first link" in the chain.

Brock chain wrenches were a staple of the J.H. Williams chain wrench line early in the company's history, and "ancestors" of the VULCAN chain wrench. Williams' subsequent chain wrench production incorporated aspects of multiple patents which makes it difficult in many cases to connect specific patents to tools as produced.

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