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US Patent: 395,213
Machine For Truing and Dressing Wrench Blanks
Matthew E. Campfield - Pittsburgh, PA

USPTO Classifications:
409/268, 409/275

Tool Categories:

Brown Specialty Manufacturing Company - Etna, PA

Not known to have been produced

A. H. Daniels
George Wanner
A. L. Schand

Patent Dates:
Applied: Feb. 23, 1888
Granted: Dec. 25, 1888

Patent Pictures:
Matthew E. Campfield patent Dec. 25, 1988
USPTO pdf tiff
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The machine has paired cutters to size all four sides and a portion of the face of the fixed jaw of a rectangular monkey wrench shank in two passes. The cutters are solidly fixed, and the reciprocating plungers force the wrench-blanks into the cutters. There are spaces at either end of the cutters for insertion and removal of the work pieces.

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