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US Patent: 13,120
Wrench
Revolving Head Nut Wrench
Patentee:
Charles B. Bristol - Naugatuck, CT

USPTO Classifications:
81/57.5

Tool Categories:
wrenches : nut wrenches
wrenches : wrench components : wrench jaw components

Assignees:
None

Manufacturer:
Unknown

Witnesses:
M. S. Manchester
R. Fitzgerald

Patent Dates:
Granted: Jun. 26, 1855

Patent Pictures: [ 1 | 2 ]
Charles B. Bristol patent June 26, 1855 rotating head nut wrench
USPTO pdf tiff
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BRISTOL*S ROTARY WRENCH edited from Aug. 25, 1855 SCIENTIFIC AMERICAN (FLICKR)
Description:
The wrench features several open end wrench sizes on a rotating disk, with a locking lever and pin to hold the selected opening in position. The patent received early notice with write-ups in SCIENTIFIC AMERICAN and a comparable British periodical.

Known examples marked only with the patent date. Those examples have a sliding pin engaging holes in the rim of the rotating head -- a much stronger construction than a pin placed close to the pivoting center of the wrench head.

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