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US Patent: 1,490,708
Dynamo-electric machine
Patentee:
Marvin L. Norris (exact or similar names) - Fort Wayne, IN

USPTO Classifications:
188/181R, 310/167

Tool Categories:
electrical devices : electric motors : induction motors : repulsion start induction run motors

Assignees:
General Electric Co. - Schenectady, NY

Manufacturer:
General Electric Co. - Schenectady, NY

Witnesses:
Unknown

Patent Dates:
Applied: Jun. 21, 1921
Granted: Apr. 15, 1924

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for General Electric Co.
Description:
"I employ a short circuiting device which moves axially of the rotor shaft into contact with the commutator to short circuit the rotor winding, the device being actuated by weights which have radial motion only relative to the rotor shaft."

This patent number was seen on a GE ½ HP AC induction motor.

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