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US Patent: 9,030X
Wrench
Improvement in screw wrench
Patentee:
Solyman Merrick - Springfield, MA

USPTO Classifications:
81/174

Tool Categories:
wrenches : nut wrenches

Assignees:
None

Manufacturer:
Bemis & Call - Springfield, MA

Witnesses:
William Bliss
Charles A. Mann

Patent Dates:
Granted: Aug. 17, 1835

Reissue Information:
Reissued as RX-38 (May 17, 1842)

Patent Pictures:
Solyman Merrick patent August 17, 1835, Reissue May 1842 and August, 1849. Renewed 1851 . 12 inch example
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Description:
The internally threaded adjusting nut engages thread cut on the shank of the wrench. The adjusting nut attaches to the moveable jaw with a strap. This is the first U.S. Screw adjust wrench patent. Reissued 17 May 1842; Extended 7 years from 17 August 1849 ; Renewed 2nd time 25 November 1851.

The wrench based on this patent and subsequent modifications was produced into the mid-20th Century.

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