US Patent: 828,895 - Screw Driver and Other Hand Tool


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US Patent: 828,895

Screw Driver and Other Hand Tool

Patentees:

Charles F. Mueller (exact or similar names) - Elizabeth, Union County, NJ

Henry R. Braunsdorf (exact or similar names) - Elizabeth, Union County, NJ

USPTO Classifications:

279/95

Tool Categories:

screwdrivers : screwdriver handles

Assignees:

None

Manufacturer:

Braunsdorf-Mueller Co. - Elizabeth, NJ

Witnesses:

Patent Dates:
Applied:	Oct. 12, 1904
Granted:	Aug. 21, 1906

Patent Pictures: [ 1 | 2 ]

Charles F. Mueller & Henry R. Braunsdorf patent August 21, 1906

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Description:

The patent describes the parts and method of assembly to form the screwdriver. The key elements include: the shaft is continuous through the handle, and has a non-circular profile through the wood handle; there is a "collar" with gripping spurs inside the base of the ferrule, and a metal end cap on the handle.

Marketed as the NEW CENTURY SCREWDRIVER; the patent was also used for the handles of ice picks and carpenters' chisels.