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US Patent: 415,969
Tool Clamp
Patentee:
George F. Hall - Newark, NJ

USPTO Classifications:
81/151

Tool Categories:
wrenches : wrench components : wrench handle components

Assignees:
None

Manufacturer:
Alsdorf and Company - Newark, NJ

Witnesses:
Thos. S. Crane
Fred. C. Fischer
L. Lee

Patent Dates:
Applied: Aug. 16, 1889
Granted: Nov. 26, 1889

Patent Pictures:
George F. Hall patent November 26, 1889
USPTO pdf tiff
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Description:
The handle screws up to clamp a movable element, by action of a sleeve and stem. Examples of applications include marking wheels and nut wrenches.

This patent and Hall's April 28, 1891 improvement (patent no. 451,183) were used in a nut wrench produced by Alsdorf and Company, Newark, NJ.

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