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US Patent: 1,699,870
Portable tool
Patentees:
Alonzo Galloway Decker - Baltimore, MD
Samuel Duncan Black - Baltimore, MD

USPTO Classifications:
173/13, 173/217, 173/29, 408/140, 408/241R, 81/54

Tool Categories:
specialty tools : handheld power tools
woodworking machines : handheld power tools

Assignees:
Black & Decker Manufacturing Co. - Towson, MD

Manufacturer:
Black & Decker Manufacturing Co. - Towson, MD

Witnesses:
Unknown

Patent Dates:
Applied: Sep. 26, 1923
Granted: Jan. 22, 1929

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Black & Decker Manufacturing Co., Ltd.
Description:
"The object of the present invention is to product a tool which can be used as a combined screw driver or socket wrench and drill." The innovation is a clutch that can be disabled when the tool is used as a drill.

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