Electricity: measuring and testing – Magnetic – Magnetic test structure elements
Patent
1979-08-01
1981-10-27
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Magnetic test structure elements
324240, G01R 3300, G01N 2782
Patent
active
042976367
ABSTRACT:
The described rotating head effects A.C. field stray flux defect testing process using a rotating magnet yoke for high magnetizing field strength. The unit is compact and replaces a great number of conventional stationary devices in which the test article must be moved along a helical line past the magnet yoke. A speed of the rotating head of 900 revolutions per minute with an effective width of the probe support of 10 cm, achieves a testing speed of approximately 1.5 m/sec. This high testing speed makes the use of A.C. field stray flux testing at high magnetizing field strength possible from the economical point of view.
REFERENCES:
patent: 2998566 (1961-08-01), Cochran
patent: 3612987 (1971-10-01), Placke et al.
patent: 4218651 (1980-08-01), Ivy
Dreher Ulrich
Link Hans
Institut Dr. Friedrich Forster Prufgeratebau
Netter George J.
Snow Walter E.
Strecker Gerard R.
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