Development of relay interlocking and use of miniature switches in place of levers; progress from inception of full sized lever to present day thumb switch; applications on British railroads.


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    Title :

    Controlling railway points and signals


    Additional title:

    Elec Energy


    Contributors:

    Published in:

    Publication date :

    1957


    Size :

    5 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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