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US Patent: 1,885,972
Hardness testing gauge
Patentee: Charles H. Wilson (exact or similar names) - Pelham, NY USPTO Classifications: 73/83 Tool Categories: metalworking tools : machinist tools : measuring tools : metal hardness testers Assignees: Wilson Mechanical Instrument Co., Inc. - New York, NY Manufacturer: Wilson Mechanical Instrument Co., Inc. - New York, NY Wilson Mechanical Instrument Division, American Chain & Cable Co., Inc. - Bridgeport, CT Witnesses: Unknown	Patent Dates: Applied: Apr. 16, 1930 Granted: Nov. 01, 1932 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Wilson Mechanical Instrument Co.
Description: Improvements to the Rockwell hardness tester, patents 1,516,207 and 1,516,208.

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