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US Patent: 850,277
System of motor control
Patentee:
Clifford Ross Tatem - Buffalo, NY

USPTO Classifications:
388/859, 417/40, 417/45

Tool Categories:
electrical devices : electric motors : motor controls

Assignees:
Bullock Electric Manufacturing Co. - Norwood, OH
Allis-Chalmers Co. - Milwaukee, WI

Manufacturer:
Allis-Chalmers Co. - Milwaukee, WI

Witnesses:
W. A. James
David Howells

Patent Dates:
Applied: Mar. 31, 1906
Granted: Apr. 16, 1907

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Allis-Chalmers Manufacturing Co.
"Vintage Machinery" entry for Bullock Electric Manufacturing Co.

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