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US Patent: 1,492,095
Electrically-driven tool
Patentees:
Alonzo Galloway Decker - Baltimore, MD
Samuel Duncan Black - Baltimore, MD

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

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

Assignees:
Maryland Trust Co. - Baltimore, MD

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

Witnesses:
Unknown

Patent Dates:
Applied: Jun. 14, 1920
Granted: Apr. 29, 1924

Patent Pictures: [ 1 | 2 ]
USPTO pdf tiff
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"Vintage Machinery" entry for Black & Decker Manufacturing Co., Ltd.
Description:
An improvement to patent 1,245,860; the improvement is to the on-off switch to address a problem with unequal contact force in a pair of contacts.

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