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US Patent: 434,912
Wrench
Patentee:
Henry Bornstein - Boston, MA

USPTO Classifications:
81/163

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

Assignees:
Henry Bornstein - Boston, MA
Charles Green - Boston, MA

Manufacturer:
American Improved Wrench Company - Boston, MA

Witnesses:
M. F. Eager
K. Durfee
O. M. Shaw
Reuben Simmons
Patent Dates:
Applied: Jun. 17, 1890
Granted: Aug. 26, 1890

Patent Pictures: [ 1 | 2 ]
Henry Bornstein patent August 26, 1890
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Description:
The patented features are the interiorly and exteriorly threaded body, and the check nut which can turn just enough to lock and unlock the movable jaw. The double threads speed adjustment.

Marketed as BORNSTEIN'S IMPROVED VISE WRENCH.

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