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US Patent: 476,028
Safety attachment for railway-trolleys
Patentee: Melvin A. Yeakley (exact or similar names) - Cleveland, OH USPTO Classifications: 191/93 Tool Categories: transportation : railroads : railroad cars and carriages Assignees: Melvin A. Yeakley - Cleveland, OH Robert A. Robertson - Cleveland, OH Manufacturer: Not known to have been produced Witnesses: H. T. Fisher N. L. McLane	Patent Dates: Applied: Apr. 07, 1891 Granted: May 31, 1892 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: This invention is for a trolley powered by an overhead wire and pulls the trolley pole down if it loses contact with the wire.

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