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US Patent: 55,066
Improvement in Screw-Wrenches
Improved Hand-Wrench
Patentee:
John L. Crist - Harrisburg, PA

USPTO Classifications:
81/129.5

Tool Categories:
wrenches : nut wrenches
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
M. S. Bower
Henry Gill

Patent Dates:
Granted: May 29, 1866

Patent Pictures:
John L. Crist Pat. May 29, 1866
USPTO pdf tiff
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Description:
This quick-adjust nut wrench uses a rotating ferule with a relieving notch to hold and release the jaws. The jaw shanks have interlocking teeth. A spring stop on the handle keeps the rotating ferule in place either in the locked or adjusting positions.

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