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US Patent: 536,301
Method of Making Wrenches
Patentee:
John C. Speirs - Worcester, MA

USPTO Classifications:
72/340, 72/362, 76/114

Tool Categories:
wrenches : wrench components : wrench handle components
tool making

Assignees:
None

Manufacturer:
Hulbert Bros. - New York, NY
J. C. Speirs & Co. - Worcester, MA

Witnesses:
Louis W. Southgate
Phil. W. Southgate

Patent Dates:
Applied: Feb. 23, 1894
Granted: Mar. 26, 1895

Patent Pictures:
John C. Speirs Pat. March 26, 1895
USPTO pdf tiff
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Description:
The patent describes a process for forming the handle and frame for an adjustable wrench. The main point of the process is the formation of a cylindrical open center which is changed to a flat oval.

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