Edge strength tester

Details Edge strength tester Edge strength tester

1994-07-29

1995-09-19

Raevis, Robert

Measuring and testing

Hardness

By penetrator or indentor

73 83, 73104, G01N 1900

Patent

active

054507456

ABSTRACT:
A device for testing a specimen for the purpose of ascertaining strength of an edge or hardness of a surface employs a pivoted rocker arm whose two extremities are interactive with voice coils that impart a controlled torque and velocity to the rocker arm. A diamond indenter and a linear variable differential transformer displacement gauge (LVDT) are also attached to the rocker arm, The torque produces a corresponding force on the indenter. A holder positions the specimen opposite the indenter, The degree of indentation produced in the specimen at two different force levels is measured by the LVDT.

REFERENCES:
patent: 4111039 (1978-09-01), Yamawaki et al.
patent: 4671104 (1987-06-01), Fischer
patent: 4691559 (1987-09-01), Fischer
patent: 4699000 (1987-10-01), Lashmore et al.

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