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US Patent: 203,581
Wrench
Patentee:
John S. Birch - Orange, NJ

USPTO Classifications:
279/38, 81/112, 81/137

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

Assignees:
None

Manufacturer:
J. S. Birch and Co. - New York, NY

Witnesses:
Chas. Nida
J. H. Scarborough
James T. Graham
C. Sedgwick

Patent Dates:
Applied: Nov. 27, 1877
Granted: May 14, 1878

Patent Pictures: [ 1 | 2 ]
John S. Birch patent May 14, 1878
USPTO pdf tiff
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Description:
The tool is a "T" handle, push button adjusting watch key or nut wrench. The patent has provision for an adjustment lock.

This was advertised as Birch's Automatic Wrench, with some significant modifications from this patent.

Birch's watch key was based on pat. no. 88,836; later versions conforming to patent no. 282,605 are also found.

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