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US Patent: 2,077,730
Balanced Helicoidal Change Speed Drive for Shapers
Patentee: William F. Zimmermann (exact or similar names) - Maplewood, Essex County, NJ USPTO Classifications: 409/327, 74/342, 74/410, 74/473.1 Tool Categories: metalworking machines : metal shapers Assignees: Gould & Eberhardt - Newark, Essex County, NJ Manufacturer: Gould & Eberhardt - Newark, Essex County, NJ Witnesses: Unknown	Patent Dates: Applied: Nov. 07, 1935 Granted: Apr. 20, 1937 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Gould & Eberhardt

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