Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1988-09-29
1990-03-27
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
73 376, 738658, 324262, G01B 710, G01R 3312
Patent
active
049124102
ABSTRACT:
An apparatus for measuring the thickness of a coating of, for example, paint or other electrically non-conductive material on a metallic base comprises a sensor head housing an electrical measuring coil and supported above the coating on a cushion of air. The air is supplied at a constant predetermined pressure to nozzles carried by the sensor head, and a constant force urging the sensor head towards the surface of the material is yieldably applied to the sensor head through a spring.
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patent: 4107606 (1978-08-01), Typpo et al.
patent: 4647855 (1987-03-01), Berglund
patent: 4742299 (1988-05-01), Stone
BNF Metals Technology Centre
Edmonds Warren S.
Eisenzopf Reinhard J.
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