Method and apparatus for measuring the strength of a fibrous bod

Details Method and apparatus for measuring the strength of a fibrous bod Method and apparatus for measuring the strength of a fibrous bod

1978-04-21

1980-01-08

Ciarlante, Anthony V.

Measuring and testing

Hardness

By penetrator or indentor

G01N 348

Patent

active

041821637

ABSTRACT:
The strength of a material is measured by positioning a tool against a surface of the material and driving an elongated piercing plug having a blunt front end into the material. The penetration depth of the piercing plug is proportional to the material strength. A trigger on the tool for releasing the piercing plug for driving movement into the material requires manual force acting through the trigger on the tool in a direction for maintaining the front end portion of the tool in engagement with the surface of the material being tested.

REFERENCES:
patent: 881047 (1908-03-01), Ballentine
patent: 2321770 (1943-06-01), Persson
patent: 2975631 (1961-03-01), Hansen
patent: 3498120 (1970-03-01), MacMillan
patent: 3732725 (1973-05-01), Allen et al.
Soiltest, "The Concrete Test Hammer", Ready Mixed Concrete, Aug. 1966, (4 pages).

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