Change of control for two plants accomplishes saving of $11,000 representing 31 per cent on investment; approach and signal-clear indications on machine; unique superimposed a.c. circuits used.


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    Title :

    Interlockers replaced by centralized traffic control on the Illinois Central


    Additional title:

    Ry. Signaling


    Published in:

    Publication date :

    1930


    Size :

    3 pages


    Remarks:

    5 Figs.


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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