Electromagnetic inspecting apparatus for magnetizable wire rope

Details Electromagnetic inspecting apparatus for magnetizable wire rope Electromagnetic inspecting apparatus for magnetizable wire rope

1981-04-21

1984-01-24

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324243, 324206, G01N 2782, G01R 3312

Patent

active

044279400

ABSTRACT:
An electromagnetic inspecting apparatus for electromagnetically detecting a defect present in a magnetizable wire rope moving in its longitudinal direction is disclosed. The apparatus comprises a first magnetic pole disposed opposite to the elongate magnetic member, a second magnetic pole having a polarity different from that of the first magnetic pole and disposed opposite to the elongate magnetic member at a position spaced apart by a predetermined distance from the first magnetic pole in the longitudinal direction, a detecting core disposed opposite to the magnetizable wire rope at a position intermediate between the first and second magnetic poles, a detecting coil wound around the detecting core to make a differential response to flows of leakage flux appearing due to the presence of a defect in the magnetizable wire rope thereby generating an electrical output signal indicative of the result of its response, and a yoke magnetically coupling the first and second magnetic poles and the detecting core at the portions remote from the elongate magnetic member.

REFERENCES:
patent: 1322405 (1919-11-01), Burrows
patent: 4270088 (1981-05-01), Weischedel

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