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US Patent: D19,412
Design For an Insertible Jaw For Wrenches
Patentee:
Bernard Donohue - Yonkers, NY

USPTO Classifications:
81/185.1, D8/21

Tool Categories:
wrenches : wrench components : wrench jaw components

Assignees:
None

Manufacturer:
Tower and Lyon - New York, NY

Witnesses:
James L. Norris
James A. Rutherford

Patent Dates:
Applied: Oct. 15, 1889
Granted: Nov. 12, 1889

Patent Pictures: [ 1 | 2 | 3 | 4 ]
Bernard Donohue Pat. Nov. 12, 1889
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Description:
The design for a gripping face features diagonal serrations on the gripping surface, and a straight-sided angular shank on the lower portion. The jaw piece was used in late production versions of Donohue's combination nut and pipe wrench marketed by Tower & Lyon of New York City.

See patent nos.195,589, 238,369, and 268,784 for the evolution of this wrench's features. Donohue's other Nov. 12, 1889 patent (no. 414,799) was not used.

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