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US Patent: 262,263
Pipe-Wrench
Improvement in Pipe-Wrenches
Patentee:
Caleb C. Walworth - Boston, MA

USPTO Classifications:
81/101

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Walworth Mfg. Co. - Boston, MA

Witnesses:
Jos. P. Livermore
Bernice J. Noyes
John F.C. Prinkert

Patent Dates:
Applied: Mar. 27, 1882
Granted: Aug. 08, 1882

Patent Pictures:
C.C. Walworth Pat. Aug. 8, 1882, with 6 in. STILLSON*S WRENCH PAT AUG. 1882 -- Stan Schulz collection
USPTO pdf tiff
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Description:
Later production of Walworth's Stillson pipe wrenches were marked with the August 1882 patent, even though they were still using the features of the April 30, 1872 Stillson patent (no. 126,161). The handle design and end cap shown in the patent drawing match a 6 inch version of the Stillson wrench that had a screwdriver tip under the end cap. The concealed screwdriver is not noted in the specifications.

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