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US Patent: 214,057
Screw-Wrench
Patentee:
George Valentine Sheffield - New York, NY

USPTO Classifications:
81/137

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

Assignees:
John Frederick Meyer - New York, NY

Manufacturer:
Not known to have been produced

Witnesses:
Duncan Campbell
Elbert L. Burnham, Jr.
Henry Eichling
E. W. Meyer

Patent Dates:
Applied: Dec. 31, 1878
Granted: Apr. 08, 1879

Patent Pictures:
George V. Sheffield patent April 8, 1879
USPTO pdf tiff
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Description:
The patent describes a manufacturing process that involves assembling the parts, and fusing some of them with molten Babbitt metal to prevent their disassembly.

The wrench is a quick-adjust using a partial screw on the rod, and partial rack inside the corresponding handle section.

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