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US Patent: 1,254,233
Speed Changer Automatic Speed Changing Attachment for Gear Cutting Machines
Patentee: James P. Johnson (exact or similar names) - Cleveland, OH USPTO Classifications: 409/34 Tool Categories: industrial machines : industrial machine mechanisms : industrial machine speed and direction changing mechanisms Assignees: None Manufacturer: Not known to have been produced Witnesses: none listed	Patent Dates: Applied: Dec. 13, 1916 Granted: Jan. 22, 1918 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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