detector bar definition

  • others:
    • A bar, associated with a switch, more than the distance between any two consecutive wheels of a train (45 to 50 foot), set inside a rail and managed by the wheels so that the switch cannot be tossed until most of the train is at night switch.
  • noun:
    • A secondary railway or club put near the rails of a switch and intended to avoid its movement while a train is driving over it.
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