Train detection on steam worked lines uses relay across rails which is shorted out by train; power considerations normally restrict rail voltage to 0.3 v; in certain circumstances this voltage is insufficient to rupture insulating surface films on wheels and rails and train is not detected; system is described which uses 20 v pulses generated by transistor circuit, and detects vehicles not detected by 0.3 v system.


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    Title :

    Pulse track-circuit system


    Additional title:

    Brit Communications Electronics


    Contributors:
    Jones, P.D. (author) / Roberts, M.H. (author) / Wright, M.J. (author)


    Publication date :

    1961


    Size :

    4 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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