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US Patent: 457,330
Automatic Brush Shifter for Dynamo Electric Machines
Patentee: Thomas E. Adams (exact or similar names) - Cleveland, OH USPTO Classifications: 322/25, 322/27, 322/55 Tool Categories: electrical devices : electric generators Assignees: Brush Electric Co. - Cleveland, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Sep. 16, 1887 Granted: Aug. 04, 1891 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Brush Electric Co.

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