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US Patent: 499,508
Pipe Wrench
Patentees:
John C. Booth - Brooklyn, NY
William Cox Redfield - Brooklyn, NY

USPTO Classifications:
81/70

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

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

Manufacturer:
Not known to have been produced

Witnesses:
F. G. Pitcher
John Armstrong
J. Staib
Charles H. Smith

Patent Dates:
Applied: Jan. 11, 1893
Granted: Jun. 13, 1893

Patent Pictures:
John C. Booth and William C. Redfield patent June 13, 1893
USPTO pdf tiff
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Description:
The patent is for refinements of the chain linking hooks of double-jaw chain pipe wrenches where the chain passes between the paired jaws, and for the connections between the jaws and the handle. The specifications compare these provisions to those in W.H. Brock's patent nos. 254,862 and 298,442.

An improved chain for jaws of this type was patented in no. 542,136. The catch in this patent is cited in patent no. 698,794, and the patent is also referenced in 769,043 and 769,054. These patents mark further evolution toward the VULCAN and AGRIPPA chain wrenches.

Lemuel W. Terrell - patent attorney

Corresponding British patent GB-189311602 registered June 13, 1893 names Redfield and J.H. Williams.

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