Security lock is described which is made with dry reed switches; using coded card to activate normally open switches with permanent magnets will close circuit, permitting operation of electric door latch, automobile ignition, etc; lock can be activated only by correct pattern of permanent magnets on card. (48259)


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    Title :

    Reed switches form nonmechanical lock


    Additional title:

    Electronics


    Contributors:

    Published in:

    Electronics ; 41 , n 22


    Publication date :

    1968


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :


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