The advantages of Tokenless (Non-token) Instrument over the conventional token instruments, toward additional safety, operational convenience, reduction in operating time and consequent increase in Section Capacity are well known. This system, although it eliminates the handling time of a token from the Station Master to the driver and vice-versa, still requires some indefinite time for the simultaneous operation (cooperation) on the instrument of the two ends of the Block Section. It is possible to save this time if the operations leading to the permission to approach and closing of the block section could be permitted without any consent in action, from the Station Master at the other end. This additional flexibility can only be obtained by additional safeguards in the design. A design, however, is based on certain assumptions which may vary from place to place and also may not be valid under all conditions of working. An attempt has been made in this paper to examine individually and collectively the various aspects which are relevant to the reliable and dependable working of this type of instrument and to formulate a suitable design, keeping in view, of course, the economic considerations.

  • Corporate Authors:

    International Railway Congress Association

    17-21 rue de Louvrain
    1000 Brussels,   Belgium 
  • Authors:
    • Das Gupta, P
  • Publication Date: 1974-4

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00071786
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Nov 20 1974 12:00AM