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US Patent: 303,321
Friction Clutch
Patentee: Francis H. Richards (exact or similar names) - Springfield, Hampden County, MA USPTO Classifications: 192/93R, 192/98 Tool Categories: industrial machines : industrial machine mechanisms : industrial machine clutches metalworking machines : metal lathes Assignees: Pratt & Whitney Co. - Hartford, Hartford County, CT Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 10, 1884 Granted: Aug. 12, 1884 Patent Pictures: 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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