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US Patent: 1,157,179
Centrifugal circuit-changing device for electric motors
Patentee: Edwin S. Pillsbury (exact or similar names) - St. Louis, MO USPTO Classifications: 310/167, 310/237 Tool Categories: electrical devices : electric motors : induction motors electrical devices : electric motors : centrifugal motor switches Assignees: Century Electric Co. - St. Louis, MO Manufacturer: Century Electric Co. - St. Louis, MO Witnesses: J. M. Chandler George B. Richards	Patent Dates: Applied: Feb. 23, 1915 Granted: Oct. 19, 1915 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Century Electric Co.
Description: Seen on a 1/4 HP single-phase repulsion-start induction-run motor, and a 3 HP 3-phase induction motor, from Century Electric.

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