US Patent: 1,516,208 - Hardness-testing machine


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US Patent: 1,516,208

Hardness-testing machine

Patentee:

Stanley P. Rockwell (exact or similar names) - West Hartford, CT

USPTO Classifications:

73/83

Tool Categories:

metalworking tools : machinist tools : measuring tools : metal hardness testers

Assignees:

None

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:	May 26, 1921
Granted:	Nov. 18, 1924

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:

One of the two patents covering the original and famous Rockwell hardness tester; see also patent 1,516,207. This one is an improvement to the inventor's patent 1,516,207 that is aimed at improving accuracy.