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US Patent: 120,475
Improvement in Pipe Wrench Attachment for Monkey Wrenches
Patentee:
Andrew H. Woodruff - Lansing, IA

USPTO Classifications:
81/184, 81/186

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Chas. Nida
Francis McArdle
H. M. Travis
Cyrus Watts

Patent Dates:
Granted: Oct. 31, 1871

Patent Pictures:
Andrew H. Woodruff Pat. Oct. 31, 1871
USPTO pdf tiff
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Description:
The jaw could sit on either the fixed or movable jaw of a a monkey wrench; it slips over the shank with spring clips.

The BILLINGS & SPENCER pipe wrench attachment introduced early in the 20th Century was also a "clip-on."

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