Hardness tester

Details Hardness tester Hardness tester

1975-03-28

1976-02-10

Myracle, Jerry W.

Measuring and testing

Hardness

By penetrator or indentor

73150R, G01N 342

Patent

active

039370690

ABSTRACT:
The tester comprises basically a four wheeled carriage, a scale arm containing graduations attached to the carriage in a counterpoised condition about a pivot axis, and a rolling, round fluted cutting tool coupled to the carriage and to the scale arm. The cutting tool, as the carriage is drawn across a test surface, leaves an indented track of the cutting flutes. The width of the track marks is a function of the coating hardness and applied load.

REFERENCES:
patent: 2279264 (1942-04-01), Hoffman
patent: 3389463 (1968-06-01), Gerek et al.

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