US Patent: 2,451,137 - Contour grinding machine for work pieces each having a hollow spherical section


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US Patent: 2,451,137

Contour grinding machine for work pieces each having a hollow spherical section

Patentee:

Charles E. White (exact or similar names) - Ashburnham, MA

USPTO Classifications:

451/239

Tool Categories:

metalworking machines : grinders

Assignees:

Van Norman Co. - Springfield, MA

Manufacturer:

Van Norman Co. - Springfield, MA

Witnesses:

Unknown

Patent Dates:
Applied:	Oct. 09, 1947
Granted:	Oct. 12, 1948

Patent Pictures:

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Vintage Machinery entry for Van Norman Machine Tool Co.

Description:

The invention is a machine "for grinding contours on work pieces have spherical surface areas, such as pattern plates or forms used in manufacturing spectacle lenses."