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US Patent: 227,892
Wrench
Improvements in Pipe and Nut Wrenches
Patentee:
Lawrence Glynn (exact or similar names) - Cambridgeport, MA

USPTO Classifications:
81/106, 81/171

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
F. Allen
Henry Chadbourn
Alben Andren

Patent Dates:
Applied: Feb. 11, 1880
Granted: May 25, 1880

Patent Pictures:
Lawrence Glynn patent May 25, 1880
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Description:
The "outer" jaw is carried on a frame that is adjusted by a screw similar to "monkey-wrenches." The bearing points for the screw are the under side of the fixed jaw, and a handle ferule. The bearing in the ferule is a slot, so the screw can move in or out as the movable jaw rocks.

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