Electromagnetic probe for measuring the thickness of thin coatin

Details Electromagnetic probe for measuring the thickness of thin coatin Electromagnetic probe for measuring the thickness of thin coatin

1983-08-31

1989-05-09

Eisenzopf, Richard J.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324262, G01B 710, G01R 3312

Patent

active

048292516

ABSTRACT:
An electromagnetic measuring probe has a pole-piece composed of a magnetic material of high magnetic permeability. The pole-piece has a front face. A recess is machined into the front face and extends into the pole-piece. A pin is positioned within said recess. The pin is composed of hard metal which has a low magnetic permeability in comparison to the material of the pole-piece. The pin has an external front face which comprises the crowned contact surface of the measuring probe.

REFERENCES:
patent: 2751552 (1956-06-01), Brenner et al.
patent: 2933677 (1960-04-01), Lieber
patent: 3626344 (1971-12-01), Shaternikou et al.
patent: 3761804 (1973-09-01), Sterngroever
patent: 3999120 (1976-12-01), Streng
patent: 4005360 (1977-01-01), Ott
patent: 4041378 (1977-08-01), Ott
patent: 4204159 (1980-05-01), Sariah et al.
patent: 4507609 (1985-03-01), Madewell
patent: 4618825 (1986-10-01), Fischer

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