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

USPTO Classifications:

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

Peck, Stow & Wilcox Co. - Southington, CT

Peck, Stow & Wilcox Co. - Southington, CT

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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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 and SOLID STEEL 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 patents no. 684,488 and 684,489 for forging and forming patents for movable jaws like those found on this style of wrench.

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