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US Patent: 2,112,840
Method of Making Wrenches
Foster A. Haist - Buffalo, NY

USPTO Classifications:
76/114, 81/165

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

J. H. Williams & Co. - Buffalo, NY

J. H. Williams & Co. - Buffalo, NY

none listed

Patent Dates:
Applied: May 08, 1935
Granted: Apr. 05, 1938

Patent Pictures:
Foster A. Haist patent April 5, 1938
USPTO pdf tiff
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The patent describes aspects of formation of the handle, head and fixed jaw of an adjustable end wrench and emphasizes the use of a broach to form part of the guide for the movable jaw.

This broaching operation results in a "D" shaped base of the guide for the movable jaw, and corresponding portion of the movable jaw. Some CRAFTSMAN adjustable wrenches produced by Williams show the same design feature.

"Pat'd in the U.S.A." on corresponding Williams wrenches reflects this patent.

Popp & Popp - patent attorneys

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

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