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US Patent: 114,505
Improvement in Wrenches
Patentee:
Aury Gates Coes - Worcester, MA

USPTO Classifications:
81/171

Tool Categories:
wrenches : wrench components : wrench jaw components

Assignees:
None

Manufacturer:
A. G. Coes & Co. - Worcester, MA

Witnesses:
Charles H. Burleigh
A. E. Pierce

Patent Dates:
Granted: May 02, 1871

Patent Pictures: [ 1 | 2 ]
A. G. Coes Pat. May 2, 1871
USPTO pdf tiff
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Description:
The patent is for the enlarged counterbore of the threaded hole in the adjustable jaw, and the extra metal in the jaw surrounding the hole. This feature is to prevent the adjusting knurl from "sticking" when the wrench is opened to its widest adjustment.

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