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GB Patent: GB-186,300,945
Spanners and Wrenches; Combination Tools
Patentee:
William Edward Newton - London, England

USPTO Classifications:

Tool Categories:
wrenches : wrench adjustment types : self-adjust wrenches

Assignees:
None

Manufacturer:
Argus Works - Sheffield, England

Witnesses:
none listed

Patent Dates:
Granted: Apr. 21, 1863

Patent Pictures:
L. Schwartzkopff patent registered April 21, 1863 - edited from "Abridgments of Specifications"
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SCHWARTZKOPFF'S SPANNER (edited ) - FLICKR
Description:
Self-adjusting wrench design; corresponding U.S. patent 42,903 was granted May 24, 1864. W. E. Newton was a British patent agent.

Produced by the Argus Works of Sheffield as SCHWARTZKOPF'S ADJUSTING SPANNER. A modification of the handle structure to allow locking the adjustment was registered Feb. 19, 1885.

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