Describes a system of interlocking without placing the levers together in one cabin, or having to carry keys about. Gives applications, trials, and statement of advantages and cost. (3400 w.)


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    Title :

    A cheap method of interlocking switches and signals


    Additional title:

    Bul Int Ry Cong


    Contributors:
    Grade, P. (author)


    Publication date :

    1905


    Remarks:

    Ills.


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :


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