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US Patent: 118,891
Improvement in Pipe Wrench
Patentees:
Walter S. Wilcox - Hartford, CT
James A. Wilcox - Rocky Hill, CT

USPTO Classifications:
81/99

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Colt's Patent Fire Arms Co. - Hartford, CT

Witnesses:
A. J. Tibbits
John H. Shumway

Patent Dates:
Granted: Sep. 12, 1871

Patent Pictures: [ 1 | 2 ]
Walter S. and James A Wilcox Pat. Sept. 12, 1871
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Description:
A compression spring keeps the hook jaw engaged with the work piece. The patent is an improvement to James Wilcox's Sept. 3, 1861 (no.33,223) and June 28, 1870 (no. 104,913) patents.

Known examples marked WILCOX'S PAT. Sept. 12, 1871 Mf'd by COLT'S Pt.F.A. Mfg. Co. HARTFORD, CT. actually have the secondary screw adjustment shown in patent no. 104,913.

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