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US Patent: 1,900,112
Grinding machine
Patentee:
Joseph H. Hoern - Saginaw, MI

USPTO Classifications:
451/247

Tool Categories:
metalworking machines : grinders : cylindrical grinders

Assignees:
Wilcox–Rich Corp. - Detroit, MI

Manufacturer:
Wilcox–Rich Corp. - Detroit, MI

Witnesses:
Unknown

Patent Dates:
Applied: Aug. 31, 1929
Granted: Mar. 07, 1933

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Hoern & Dilts, Inc.
Description:
"This invention relates to machines for grinding the outside diameter of the head of headed articles such as poppet valves for internal combustion engines, and what is known as the 'mushroom' type of valve tappet, and other articles of similar nature."

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