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US Patent: 1,784,133
Electric drive for grinder wheels
Alonzo G. Decker - Baltimore, MD

USPTO Classifications:
310/118, 310/83, 451/344

Tool Categories:

Marschke Manufacturing Co. - Indianapolis, IN

Not known to have been produced


Patent Dates:
Applied: Dec. 14, 1927
Granted: Dec. 09, 1930

Patent Pictures:
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"Vintage Machinery" entry for Black & Decker Manufacturing Co., Ltd.
This patent is notable because the inventor is the co-founder of Black & Decker, which at the time of the patent was already quite successful. Decker was still with the company, so why did he assign an invention to someone else? A possible clue is in patent 1,911,857, where Marschke Manufacturing Co. is identified as being from Towson, Maryland, which was (and is) the hometown of Black & Decker. Perhaps Marschke Manufacturing was acquired by B&D.

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