Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1972-07-14
1976-06-29
Corcoran, Robert J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
G01R 3312
Patent
active
039671933
ABSTRACT:
Discontinuities in metallic objects are detected by a conductor generating a magnetic field in the objects and probe means sensitive to the magnetic field and disturbances therein caused by the discontinuities.
REFERENCES:
patent: 2255053 (1941-09-01), Gunn
patent: 3247453 (1966-04-01), Quittner
patent: 3354385 (1967-11-01), Wood et al.
patent: 3694740 (1972-09-01), Bergstrand
Hitachi, K. K.; Method of Electromagnetic-Chemical Non-Destructive Inspection, Publication No. 24867/69; Dec. 16, 1966.
Allmanna Svenska Elektriska Aktiebolaget
Corcoran Robert J.
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