Details of public address system in use in Illinois Central's outbound freight house, Chicago, Ill, which expedites movement of freight; system includes 33 loud speakers; output from each speaker varies from 2 1/2 to 5 w and value is controlled by varying speaker transformer.


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    Title :

    Speakers speed freight movement


    Additional title:

    Ry Signaling


    Published in:

    Publication date :

    1945


    Size :

    2 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





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