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US Patent: 392,490
Commutator-bar for dynamo-electric machines
Patentee: Charles E. Billings (exact or similar names) - Hartford, CT USPTO Classifications: 310/236, 408/239R Tool Categories: electrical devices : electric motors : motor commutators Assignees: None Manufacturer: Billings & Spencer Co. - Hartford, CT Witnesses: Frederick C. Billings Willard Eddy	Patent Dates: Applied: Dec. 04, 1886 Granted: Nov. 06, 1888 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Billings & Spencer Co.

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