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US Patent: 742,389
Pipe-Wrench
Patentee:
Frank D. Bullard (exact or similar names) - Los Angeles, CA

USPTO Classifications:
81/91.1, 81/91.2

Tool Categories:
wrenches : wrench adjustment types : self-adjust wrenches

Assignees:
None

Manufacturer:
Bullard Automatic Wrench Co. - Providence, RI
Roren Drop Forging - Providence, RI

Witnesses:
G. E. Harpham
Margarete C. Nickeleson
Geo. E. Winton

Patent Dates:
Applied: Mar. 26, 1903
Granted: Oct. 27, 1903

Patent Pictures: [ 1 | 2 ]
Patent 742.389 - edited image
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Bullard Wrench history snippets -- (FLICKR)
Description:
The BULLARD wrench was invented by a Los Angeles physician; one mention in a local professional journal noted he was also a "poet and inventor." This patent was a modification of earlier designs ( 729,728 and 733,138 ) which are not known to have been produced.

The gripping action is an approximation of the way a thumb and fingers grasp objects -- this is reflected in some ads published by the 2nd manufacturer. The design is reflected in wrenches of obscure (including German) origin, bearing names like "Plattina," "EDISON," etc.

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