US Patent: 1,571,310 - Penetrator for testing penetration hardness


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US Patent: 1,571,310

Penetrator for testing penetration hardness

Patentee:

Charles H. Wilson (exact or similar names) - North Pelham, NY

USPTO Classifications:

73/85

Tool Categories:

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

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Feb. 14, 1924
Granted:	Feb. 02, 1926

Patent Pictures:

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"Vintage Machinery" entry for Wilson Mechanical Instrument Co.

Description:

It is not known whether this patent was used, but the inventor had established the Wilson Mechanical Instrument Co., Inc., to manufacture Rockwell hardness testers.