Racor weight-responsive retarders with speed sensing elements and hydraulic switch machines that are controlled by retarder operator installed at Columbus, Ohio Grandview yard of Pennsylvania Railroad are described; master retarder and three group retarders are used to control speeds of cars being classified into any of nine tracks; car wheels traveling over notches in rail set up vibrations for speed sensing; electronic equipment acts on speed sensing vibrations to properly set retarders. (See also Ry Signaling and Communications v 58 n 3 Mar 1965 p 13-16)


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    PRR upgrades yard, improves service


    Additional title:

    Ry Track Structures


    Published in:

    Publication date :

    1965


    Size :

    2 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    PRR upgrades yard, improves service

    Engineering Index Backfile | 1965



    C and O upgrades yard communications

    Engineering Index Backfile | 1956


    CONSTRUCTION YARD UPGRADES AT AKER GULF MARINE

    Sezer, F. / Society of Naval Architects and Marine Engineers | British Library Conference Proceedings | 2000


    CONSTRUCTION YARD UPGRADES AT AKER GULF MARINE

    Sezer, F. / Society of Naval Architects and Marine Engineers | British Library Conference Proceedings | 2000