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US Patent: 2,281,921
Tumble Change Gear Mechanism
Patentee:
Frank W. Curtis - Springfield, Hampden County, MA

USPTO Classifications:
122/367.1, 74/353, 74/473.24, 74/745

Tool Categories:
metalworking machines : milling machines
metalworking machines : metalworking machine mechanisms

Assignees:
Van Norman Machine Tool Co. - Springfield, Hampden County, MA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 07, 1941
Granted: May 05, 1942

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Van Norman Machine Tool Co.

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