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US Patent: 1,103,784
Change-speed mechanism
Patentee: George O. Leopold (exact or similar names) - Philadelphia, PA USPTO Classifications: 74/374 Tool Categories: metalworking machines : drilling and boring : drill presses woodworking machines : wood drilling and boring : drill presses Assignees: North Brothers Manufacturing Co. - Philadelphia, PA Manufacturer: North Brothers Manufacturing Co. - Philadelphia, PA Witnesses: Russell O. Graffins William A. Barr	Patent Dates: Applied: Sep. 20, 1913 Granted: Jul. 14, 1914 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for North Brothers Mfg. Co.
Description: Seen on a model 1005 bench drill from North Bros.

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