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US Patent: 228,860
Holding-Tool
Patentee:
John S. Birch - Orange, NJ

USPTO Classifications:
81/112, 81/177.8, 81/58.3

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Henry N. Miller
C. Sedgwick
James T. Graham

Patent Dates:
Applied: Dec. 29, 1879
Granted: Jun. 15, 1880

Patent Pictures:
John S. Birch patent June 15, 1880
USPTO pdf tiff
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Description:
The tool is a self-adjusting socket wrench. The frame and internal push button are flattened oval tubes. The wrench has a side handle for additional leverage. It is an obvious evolution from Birch's May 14, 1878 patent (no. 203,581).

The patent covers the oblong case, the side handle, and the form of connection between the handle and the case.

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