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US Patent: 100,064
Improvement in friction-clutches
Patentee: Francis A. Pratt (exact or similar names) - Hartford, CT USPTO Classifications: 192/110R, 192/93B Tool Categories: industrial machines : industrial machine mechanisms : industrial machine clutches Assignees: Pratt, Whitney & Co. - Hartford, CT Manufacturer: Not known to have been produced Witnesses: Jeremy W. Bliss Monroe Stannard	Patent Dates: Granted: Feb. 22, 1870 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Pratt & Whitney Co.

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