Hardness tester

Details Hardness tester Hardness tester

1976-02-10

1977-08-09

Myracle, Jerry W.

Measuring and testing

Hardness

By penetrator or indentor

73 85, G01N 342

Patent

active

040402916

ABSTRACT:
A method of measuring surface hardness combining the techniques of Brinell Hardness testing and air-gauging by providing a hard penetrator member having in it a passage and apertures through which air under pressure is passed. The hardness of a work piece is measured by measuring the effect on air pressure caused by occlusion of the apertures as the penetrator is pressed into a specimen of which the hardness is to be measured.

REFERENCES:
patent: 1192670 (1916-07-01), Moore et al.
patent: 2679163 (1954-05-01), Morris et al.
patent: 3116478 (1963-12-01), Powell

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