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US Patent: 208,105
Spanner or Wrench
Adjustable Spanner or Monkey-Wrench
William Robert Leeson - Bridgewater, England

USPTO Classifications:

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


Not known to have been produced

George Ricks
Charles Bellringer
Chas. A. Pettit
Solon C. Kemon

Patent Dates:
Applied: Jul. 09, 1878
Granted: Sep. 17, 1878

Patent Pictures:
William R. Leeson patent September 17, 1878
USPTO pdf tiff
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A toothed piece inside the movable jaw is jammed against matching fine rack teeth on the main bar to hold the adjustment. A toggle inside the jaw generates the jamming action, and is a focus of the patent.

The specifications demonstrate the parallel evolution of British and American vocabulary -- by treating "spanner" and "wrench" as synonyms.

Corresponding British patent GB-187800445 was registered February 2, 1878.

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