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US Patent: 553,059
Wrench
Solid Bar Monkey Wrench
Patentee:
Robert Cosmos Ellrich - Southington, CT

USPTO Classifications:
81/171

Tool Categories:
wrenches : wrench components : wrench handle components
wrenches : nut wrenches

Assignees:
Peck, Stow & Wilcox Co. - Southington, CT

Manufacturer:
Peck, Stow & Wilcox Co. - Southington, CT

Witnesses:
Stephen Walkley
R. M. Stannard
A. W. Stipek
P. J. Egan

Patent Dates:
Applied: Nov. 02, 1895
Granted: Jan. 14, 1896

Patent Pictures: [ 1 | 2 | 3 ]
Robert C. Ellrich patent January 14, 1896
USPTO pdf tiff
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Description:
The main shank and base for the adjusting screw are in one piece. The shank is notched to fit around the nut portion of the adjusting screw. The movable jaw is formed of a second piece with the "back" side opened; it is closed around the shank and pinned or closed with a clamping screw.

The patent was used for the SOLID BAR nut wrenches produced by Peck, Stow and Wilcox, and also marketed under such brand names as KEEN KUTTER, etc.

See also Pardon A. Whitney's Oct. 15, 1901 patent no. 684,488 for a forging and forming patent for the movable jaw.

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