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US Patent: 871,193
Arrangement for motor-drives
Patentee:
Emmett W. Stull (exact or similar names) - Norwood, OH

USPTO Classifications:
310/112, 318/102, 318/64, 477/17, 477/3, 74/397

Tool Categories:
electrical devices : electric motors : motor controls

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

Manufacturer:
Allis-Chalmers Co. - Milwaukee, WI

Witnesses:
George B. Schley
Fred J. Kinsey

Patent Dates:
Applied: Jun. 30, 1906
Granted: Nov. 19, 1907

Patent Pictures:
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Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Allis-Chalmers Mfg. Co.
Vintage Machinery entry for Bullock Electric Mfg. Co.
Description:
"In many places where electric motors are used it is essential that there be no break in the continuous operation of the system. Such is the case for instance in rolling mills, where a breakdown in the operating mechanism often causes a great loss due to the cooling down of the heated metal. In this rolling mills it is absolutely essential that the process be continuous. I have provided a system in which, in case of the breaking down of the driving motor, an emergency motor may be connected to the device to be driven, the injured motor being disconnected both mechanically and electrically so that it may be removed and repaired at leisure."

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