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US Patent: 1,245,860
Electrically-driven tool
Alonzo Galloway Decker - Baltimore, MD
Samuel Duncan Black - Baltimore, MD

USPTO Classifications:
173/170, 200/417, 310/50, 310/68A

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

Black & Decker Manufacturing Co. - Baltimore, MD

Black & Decker Manufacturing Co. - Towson, MD


Patent Dates:
Applied: Dec. 04, 1914
Granted: Nov. 06, 1917

Patent Pictures: [ 1 | 2 | 3 | 4 ]
USPTO pdf tiff
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"Vintage Machinery" entry for Black & Decker Manufacturing Co., Ltd.
This important patent marks the beginning of the modern era of the handheld electric drill: it is the first pistol-grip drill with a trigger switch. The primary innovation covered by the patent is to place an on-off trigger switch in the handle of the drill.

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