US Patent: 2,272,055 - Polishing and grinding machine


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US Patent: 2,272,055

Polishing and grinding machine

Patentee:

Gustave A. Carlson (exact or similar names) - Detroit, MI

USPTO Classifications:

29/38A, 29/38D, 451/247

Tool Categories:

specialty machines : polishing and buffing machinery

Assignees:

None

Manufacturer:

Acme Mfg. Co. (Michigan) - Detroit, MI

Witnesses:

Unknown

Patent Dates:
Applied:	Apr. 12, 1939
Granted:	Feb. 03, 1942

Patent Pictures:

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Vintage Machinery entry for Acme Mfg. Co. (Michigan)

Description:

This machine is a refinement of patent 2,166,461 to allow it to handle concave surfaces. The application shown is finishing the interior of hemispherical shells such as hub caps or headlight enclosures.