AUTOMATIC REGULATION OF TRAIN SPEED

Successful trials on the Belgian National Railways of an inductive control system are reported. Signal aspects are displayed in the driving cab. Transmission of information from the track to the locomotive is carried out by a pair of inductors between the rails, each of which contains a coil of litz wire tuned by a capacitor. Beneath the locomotive there are two detectors. The input and output of a wide-band amplifier are connected to the loops. The effect of an inductor on the track beneath a detector is to couple the two loops by a link having a resonant frequency between 50 and 100 kc/s, and the amplifier will then generate a signal of the same frequency as the inductor. Inductors may be tuned to 15 different frequencies in this range so that a large variety of information can be transmitted to the locomotive as compared with electro-magnetic systems.

• Corporate Authors:

  Temple Press Limited

  161-166 Fleet Street
  Longon EC4,   England 
• Publication Date: 1965-3-5

Media Info

• Features: Figures; Photos;
• Pagination: 4 p.
• Serial:
  • RAILWAY GAZETTE
  • Volume: 121

Subject/Index Terms

• TRT Terms: Automatic train operation; Automatic train protection; Cab signals; Control systems; Equipment design; Railroad trains; Signal devices; Signaling; Speed control; Tachographs; Technology; Velocity
• Geographic Terms: Belgium
• Old TRIS Terms: Train speed recorders; Velocity control
• Subject Areas: Design; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00037857
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 8 1994 12:00AM