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US Patent: 275,335
Tool For Grasping and Holding Articles
Patentee:
Thomas G. Hall - Brooklyn, NY

USPTO Classifications:
269/218, 269/220, 269/221, 269/256

Tool Categories:
wrenches : brace wrenches
work holding : vises : hand vises

Assignees:
Isaac N. Cook - Yonkers, NY
Samuel B. McLane - Yonkers, NY

Manufacturer:
Not known to have been produced

Witnesses:
E. B. Bolton
Geo. Bainton
Arthur C. Fraser
Henry Connett

Patent Dates:
Applied: Nov. 29, 1882
Granted: Apr. 03, 1883

Patent Pictures:
Thomas G. Hall patent April 3, 1883
USPTO pdf tiff
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Description:
The base and upper portion of the jaws are both adjustable by screws. The piece could be a stand-alone hand vise, or the jaws of a combination brace wrench. It is described as an improvement to the J. Goodrich May 18, 1880 patent (no. 227,686). The improvement is is supplemental cross-pieces or keyway-shaped tails of the movable jaws to counteract torsional strain.

Samuel B. McLane's parallel patent (no. 275,341) is another variation of the same idea.

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