Portable material hardness tester

Details Portable material hardness tester Portable material hardness tester

1979-07-13

1981-01-20

Gill, James J.

Measuring and testing

Hardness

By penetrator or indentor

G01N 344

Patent

active

042454964

ABSTRACT:
A portable hardness tester including a surface sensing member yieldably mounted for engagement with the surface of material to be tested and a penetrator yieldably mounted adjacent the sensing member for joint contact with the surface; manually applied means for applying minor and major penetrating forces on the penetrator; and electronic means for sensing the differential movement between the penetrator and surface sensing member and translating such differential movement into a hardness indication.

REFERENCES:
patent: 2839917 (1958-06-01), Webster
patent: 3367174 (1968-02-01), Afri
patent: 4023401 (1977-05-01), Ernst
patent: 4116048 (1978-09-01), Appleford et al.

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