Multiple pulse responder and detection system and method of...

Details Multiple pulse responder and detection system and method of... Multiple pulse responder and detection system and method of...

G - Physics

08

B

G08B 13/24 (2006.01)

Patent

CA 2083886

- 23 - ABSTRACT A responder for electronic article surveillance apparatus is made by subjecting a plurality of magnetizable elements to heating in the presence of a magnetic field and maintaining the field at a different intensity for each element as it is cooled to provide different magnetic characteristics so that when the responder is subjected to a cyclically varying magnetic interrogation field its several elements produce spaced apart pulses in each cycle. F501\A0109587\mcw

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