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US Patent: 542,938
Wrench
Improvements in Pipe Wrenches
Patentee:
Harry McElroy (exact or similar names) - Palestine, TX

USPTO Classifications:
81/93

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Henry Jones
J. F. Coleman
Jim Conaway
P. H. Hughes

Patent Dates:
Applied: Jan. 30, 1895
Granted: Jul. 16, 1895

Patent Pictures:
Harry McElroy patent July 16, 1895
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Description:
A spring between the movable jaw and shank provides the "wiggle" necessary to keep the jaws from locking on pipe.

The adjusting nut is held firmly against the ferule by a retainer.

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