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US Patent: 212,298
Wrench
Patentee:
Charles E. Billings - Hartford, CT

USPTO Classifications:
81/167, 81/177.1

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

Assignees:
None

Manufacturer:
Billings & Spencer - Hartford, CT

Witnesses:
Theo. G. Ellis
Wilmot Horton
Norman W. Eayrs

Patent Dates:
Applied: Nov. 25, 1878
Granted: Feb. 18, 1879

Patent Pictures: [ 1 | 2 | 3 ]
Charles E. Billings Pat. Feb. 18, 1879
USPTO pdf tiff
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Description:
The key features of the patent are the milled handle slot which forms the "way" for the adjustable jaw, and the measurement scale on the shank. This patent was the basis for a series of adjustable wrenches produced over several decades.

The design was copied by several manufacturers after the patent expired.

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