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US Patent: 218,639
Pipe-Wrenches
Patentee:
Wilson Newcomb - Baltimore, MD

USPTO Classifications:
81/90.1

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. E. Carpenter
Jno. T. Maddox
Wm. C. Nicholls
G. M. Pool

Patent Dates:
Applied: Dec. 04, 1878
Granted: Aug. 19, 1879

Patent Pictures:
Wilson Newcomb patent August 19, 1879
USPTO pdf tiff
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Description:
This self-adjusting design has a loose link preventing separation of the two jaws, and solid pivots at the base of the two jaws. The location of the gripping surfaces is slightly different than in other wrench designs of this type.

For comparison, look at pat. no. 215,128.

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