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US Patent: 427,743
Vehicle Wrench
Improvements in Hub-Wrenches
William M. Chamberlain - Sheffield, AL
Harold B.  Smith - Barre, MA
Robert L. Warner - Portland, OR

USPTO Classifications:

Tool Categories:
wrenches : axle nut wrenches : axle nut wrenches that lock nut to wheel hub


Not known to have been produced

Geo. Y. Thorpe
Edwin S. Clarkson
H. C. Torrey
Fred. W. Hargreaves

Patent Dates:
Applied: Mar. 05, 1890
Granted: May 13, 1890

Patent Pictures:
William M. Chamberlain, Harold B. Smith, and Robert L. Warner patent May 13, 1890
USPTO pdf tiff
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The drawings do not clearly show how this works. It has a central wrench socket for the axle nut. The top lever has pins that extend the side pieces which clamp against the inside of the wheel hub. This locks the axle nut to the wheel so the wheel and nut can be turned on or off the axle together.

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