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US Patent: 123,638
Improvement in Screw Wrenches
Charles Neil - Sheffield, England

USPTO Classifications:
81/165, 81/170

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches


Not known to have been produced

Joseph Owen
John Bramhall
Chas. Nida
Francis McArdle

Patent Dates:
Applied: Aug. 23, 1871
Granted: Feb. 13, 1872

Patent Pictures:
Charles Neil Pat. Feb. 13, 1872
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Charles Neil Screw Wrench (Scientific American Mar. 23 ,1872)
The patented feature is the recess for the adjusting worm, and the protecting lip. The specifications indicate the jaws and handle would be made of malleable cast iron.

The patent is described in the March 23, 1872 SCIENTIFIC AMERICAN.

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