US Patent: 871,970 - System of motor control


	Home\| FAQ	Search:Advanced\|Person\|Company\| Type\|Class	Login


Quick search:	Patent number:	Patent Date:

US Patent: 871,970

System of motor control

Patentee:

Emmet W. Stull (exact or similar names) - Norwood, OH

USPTO Classifications:

200/5R, 200/7, 318/103, 318/58, 318/96

Tool Categories:

transportation : railroads : electric railroads

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:	Mar. 31, 1906
Granted:	Nov. 26, 1907

Patent Pictures:

USPTO (New site tip)
Google Patents
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:

"My invention relates to controllers for electric motors, and particularly to railway controllers of the type adapted to control a plurality of motors. One of the objects of my invention is to enable injured or disabled motors to be cut out of circuit without affecting the action of the controller upon the remaining motors..."