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US Patent: 881,216
Chain Pipe Wrench
Patentee:
George Amborn (exact or similar names) - New York, NY

USPTO Classifications:
81/70

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

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

Manufacturer:
J. H. Williams & Co. - Brooklyn, N.Y.

Witnesses:
Eugene V. Myers
Theodore T. Snell
Fred White
René Bruine

Patent Dates:
Applied: May 06, 1907
Granted: Mar. 10, 1908

Patent Pictures: [ 1 | 2 ]
George Amborn patent March 10, 1908
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"AGRIPPA" (1907 write-up) - FLICKR
Description:
Improvement to wrench of the type in patent no. 698,780, to allow the chain to pass to either side of the center line of the handle regardless of which "face" of the toothed jaw was engaging the work. The construction includes alternate provisions for allowing the chain sufficient "free play" to allow the chain to swing to either side of the handle and head.

Study of WILLIAMS patents and advertising connects this to the AGIPPA Pipe & FITTINGS wrench, with several earlier patents appearing to be stages in the evolution of the design finally produced. A known example had a handle shortened to work in confined space.

Arthur C. Fraser & Co. - patent attorneys

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