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US Patent: 563,519
Combined Pipe and Nut Wrench
Patentee:
Robert James Thompson (exact or similar names) - Grandin, MO

USPTO Classifications:
81/91.2

Tool Categories:
wrenches : wrench adjustment types : self-adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
John L. Tumson
M. P. Smith
T. P. Epperson
John McDermott
Patent Dates:
Applied: Aug. 05, 1895
Granted: Jul. 07, 1896

Patent Pictures:
Robert James Thompson patent July 7, 1896
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Description:
A hinged link to one jaw and toggle link to the second jaw enables one-handed operation. Alternate forms for the jaw and toggle link are noted.

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