A Fouling BarA mechanically operated form of Train Detection activated by the flange of a wheel. More, provided for mechanically worked Facing PointsPoints which join two diverging Routes. Points are considered to be facing when they carry Running Movements in a Facing Direction. More, that acts in
conjunction with the Facing Point Lock, preventing the unlocking of the
pointsItems of permanent way which may be aligned to one of two positions, Normal or Reverse, according to the direction of train movement required. More during the passage of a train. It has generally been superseded by
more modern forms of Train DetectionThe proof of the position of the Points (Normal or Reverse) to the Interlocking equipment. More.