Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1976-11-15
1978-05-09
Corcoran, Robert J.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324238, 336 84R, 336178, 336212, G01R 3312
Patent
active
040889530
ABSTRACT:
A coil of insulated wire surrounds a low reluctance core. A combination of low reluctance and high reluctance materials positioned adjacent said coil: (1) control the spatial extent of the magnetic flux and, (2) concentrate the total reluctance of the magnetic circuit of the exciting coil into a volume of controlled size and shape within the material being tested. The magnetic flux is controlled, and the reluctance is concentrated, in such a manner as to optimize the sensitivity of the eddy-current generator to variations in the material being tested; at the same time, the coil impedance is maintained at a value which is optimum for the performance of any selected precision electrical impedance measuring device.
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Pasley et al., Eddy Current Testing, Nondestructive Testing, NASA, 1963, 620, 1127, 5089N, pp. 101-118.
Corcoran Robert J.
The Reluxtrol Company
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