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US Patent: 2,475,954
Variable speed pulley
Patentee: Willard E. Gerbing (exact or similar names) - Chicago, IL USPTO Classifications: 474/37, 474/46 Tool Categories: industrial machines : industrial machine mechanisms : industrial machine pulleys and belt drive mechanisms Assignees: None Manufacturer: Gerbing Mfg. Corp. - Northbrook, IL Witnesses: Unknown	Patent Dates: Applied: Oct. 21, 1946 Granted: Jul. 12, 1949 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Gerbing Mfg. Co.
Description: This variable-diameter pulley keeps a constant center-line regardless of diameter, and purports to have an exceptionally wide range of diameters.

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