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US Patent: 2,535,199
Gear holding diaphragm chuck
Patentee:
Bernard C. Day (exact or similar names) - Springfield, VT

USPTO Classifications:
279/133, 279/136, 279/139, 451/381

Tool Categories:
metalworking machines : grinders
metalworking machines : gear making machines

Assignees:
Bryant Chucking Grinder Co. - Springfield, VT

Manufacturer:
Bryant Chucking Grinder Co. - Springfield, VT

Witnesses:
Unknown

Patent Dates:
Applied: May 28, 1947
Granted: Dec. 26, 1950

Patent Pictures: [ 1 | 2 ]
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Vintage Machinery entry for Bryant Chucking Grinder Co.
Description:
"This invention relates to diaphragm chucks and has for an object to provide a chuck of this type suitable for supporting gears by engagement at their pitch circles so that their central bores are properly positioned for accurate finishing as by grinding."

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