TRAIN TRAFFIC INTERVAL CONTROL DEVICE Russian patent published in 2004 - IPC

FIELD: railway transport.

SUBSTANCE: invention relates to railway signaling and it can be used in devices for internal control of train traffic to reveal presence of track circuit devices. Proposed device contains track circuit, automatic interlock decoder and approach annunciator relay circuit. Device has also approach annunciator relay back repeater circuit and check generator connection circuit. Resting contact of approach annunciator is placed in circuit of approach annunciator back repeater, and series chain consisting of first resistor and second capacitor is connected in parallel to winding of said relay. Front contact of yellow light relay are placed in approach annunciator circuit which contains also circuit of yellow light repeater. Power is supplied to track circuit from ac voltage source poles.

EFFECT: improved safety, reduced delay of trains owing to reducing probability of false indication of occupancy of track circuit, provision of reliable checking of track circuit devices for availability.

1 dwg