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US Patent: 2,077,730
Balanced Helicoidal Change Speed Drive for Shapers
Patentee:
William F. Zimmermann - 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 pdf tiff
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"Vintage Machinery" entry for Gould & Eberhardt

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