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US Patent: 424,274
Parallel Jaw Tool
Patentees:
John L. Coles - Brooklyn, NY
David H. Coles - Brooklyn, NY

USPTO Classifications:
81/403

Tool Categories:
pliers

Assignees:
Empire State Manufacturing Company - Jersey City, NJ

Manufacturer:
Not known to have been produced

Witnesses:
Oscar A. Michel
William Miller
William C. Hauff
Ernst F. Kastenhuber

Patent Dates:
Applied: Jun. 06, 1889
Granted: Mar. 25, 1890

Patent Pictures:
John L. Coles and David H. Coles patent March 25, 1890
USPTO pdf tiff
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Description:
The specifications note a range of applications for this framework -- such things as pliers, punches, snips, pinchers, etc. The jaw faces may be dovetailed to allow insertion of such functions.

The adjustable jaw rides on an adjustable fulcrum which rides between cheek pieces that are part of the second jaw. The end support for these cheek pieces and the adjusting screw is attached by welding, etc.

The assignee is corrected by an addendum dated April 1, 1890.

Cited as a reference in patent no. 2,444,135.

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