Four large interlockings handle new facilities including many of functions formerly included in 16 old plants; operating difficulties; work completed by stages; Broad Zoo, Penn, and Gray's Ferry interlocking; track and signal plan; indication received on interlocking machine; ground-detector system; interlocking machine rooms; flexible communication system facilities operation; compressors and air lines; duct and cable system; power transmission and distribution.


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    Title :

    Signaling Philadelphia terminal of Pennsylvania


    Additional title:

    Ry. Signaling


    Contributors:
    Post, E.K. (author)

    Published in:

    Publication date :

    1931


    Size :

    7 pages


    Remarks:

    15 Figs.


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





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