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US Patent: 2,543,283
Screw and Nut Driving Tool
Patentee:
Louis Frank (exact or similar names) - Fellows, CA

USPTO Classifications:
294/25, 294/92, 81/177.3

Tool Categories:
wrenches
screwdrivers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jan. 15, 1949
Granted: Feb. 27, 1951

Patent Pictures:
Louis Frank Pat. February 27, 1951
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Description:
The tool has a spring-loaded holder attached to a thimble-like fingertip socket. The holder in turn can directly grip screw heads or similar shaped heads of small tools such as screwdrivers, socket wrenches, etc. The shanks of these small tools are knurled so they can be turned by rotating between the thumb and second finger.

It is an improvement on Frank's May 4, 1943 pat. no. 2,440,854.

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