Device for defect testing of non-ferromagnetic test samples and

Details Device for defect testing of non-ferromagnetic test samples and Device for defect testing of non-ferromagnetic test samples and

1988-12-09

1990-09-04

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324227, 324241, G01N 2782, G01N 2790

Patent

active

049547771

ABSTRACT:
Detection of both surface defects of a non-ferromagnetic test body as well s the presence of ferromagnetic particles in the test body by inducing eddy currents and D.C. fields in the body. The resulting signal voltages are filtered and separately examined.

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patent: 3972156 (1976-08-01), Bennett, Jr. et al.
patent: 4303885 (1981-12-01), Davis et al.
patent: 4602212 (1986-07-01), Hiroshima et al.
patent: 4618823 (1986-10-01), Dahlheimer et al.

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