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US Patent: 248,587
Device for Throwing Belts Onto or Off From Revolving Pulleys
Patentee: William Gray (exact or similar names) - Hartford, Hartford County, CT USPTO Classifications: 474/130 Tool Categories: specialty tools : belt shifters Assignees: William Gray - Hartford, Hartford County, CT Amos Whitney - Hartford, Hartford County, CT Manufacturer: Pratt & Whitney Co. - Hartford, Hartford County, CT Witnesses: Theodore G. Ellis W. Marsh Charles L. Burdett Erwin F. Dimock	Patent Dates: Applied: Aug. 31, 1881 Granted: Oct. 25, 1881 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Pratt, Whitney & Co.

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