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US Patent: 114,939
Improvement in Pipe-Cutters
Patentee:
Dennis Harrigan - North Somerville, MA

USPTO Classifications:
81/181

Tool Categories:
wrenches : wrench components : pipe jaw attachments for wrenches

Assignees:
Joel Gay - Cambridge, MA
Dennis Harrigan - North Somerville, MA

Manufacturer:
Not known to have been produced

Witnesses:
F. C. Hale
M. B. Gay
F. P. Hale

Patent Dates:
Granted: May 16, 1871

Patent Pictures:
Dennis Harrigan Pat. May 16, 1871
USPTO pdf tiff
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Description:
The invention is a clamp-on attachment for a "monkey-wrench." The cutter is described as a "chisel" advanced by a feed-screw. The device can be slid on the fixed head of the wrench to adjust to the size of the pipe.

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