US Patent: 218,639 - Pipe-Wrenches


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US Patent: 218,639

Pipe-Wrenches

Patentee:

Wilson Newcomb (exact or similar names) - 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:

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

Patent Pictures:

Wilson Newcomb patent August 19, 1879

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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.