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US Patent: 293,984
Adjustable Wrench
Patentee:
Alphonso B. Smith - San Francisco, CA

USPTO Classifications:
81/163

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

Assignees:
None

Manufacturer:
Unknown

Witnesses:
F. M. Downey
Geo. A. Dickson
Edward E. Osborn

Patent Dates:
Applied: Apr. 18, 1883
Granted: Feb. 19, 1884

Patent Pictures:
Alphonso B. Smith patent February 19, 1884
USPTO pdf tiff
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Alphonso B. Smith (bio.)
Description:
A left- and right-handed threaded shaft moves the jaws toward and from a common center. The patent presents single and double handled versions, with the jaws held either by a slotted back or a guide rod. One possible use for this design is as a tap wrench.

A known example has double handles, with the jaws held by a guide rod.

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