Method and apparatus for sensitizing and desensitizing targets f

Details Method and apparatus for sensitizing and desensitizing targets f Method and apparatus for sensitizing and desensitizing targets f

1991-09-16

1993-07-06

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

335284, 340572, G08B 1324, H01F 720

Patent

active

052258076

ABSTRACT:
Magnetically desensitized targets or sensor elements on protected articles are resensitized by means of rotating permanent magnets which are moved relative to the magnetized target desensitizer elements such that the elements become subjected to reversing magnetic fields of gradually decreasing intensity.

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