Illustrated description of interlocking installed at west end of yards near Portland, Me, by Portland Terminal Co, to replace mechanical plant at P.T. Tower 1 that had been in service since 1896; plug-in relays, aerial cable and circuit improvements are features of new plant.


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    Title :

    All-relay electric interlocking on Portland Terminal


    Additional title:

    Ry Signaling


    Published in:

    Publication date :

    1945


    Size :

    6 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    At Portland terminal combined interlocking

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    Pacific electric terminal interlocking

    Engineering Index Backfile | 1917