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US Patent: 300,734
Device for changing speed
Patentee: George H. Preston (exact or similar names) - Shortsville, NY USPTO Classifications: 235/94R, 74/119, 74/124, 74/148, 74/162 Tool Categories: industrial machines : industrial machine mechanisms Assignees: Empire Drill Co. - Shortsville, NY Manufacturer: Empire Drill Co. - Shortsville, NY Witnesses: Henry O. Klinck Oliver S. Titus	Patent Dates: Applied: Nov. 23, 1883 Granted: Jun. 17, 1884 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: Information taken from Clifford D. Fales' database. A "device for regulating and varying the speed of driving and counter shafts, etc."

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