METHOD OF CONTROLLING THE IDLENESS OF A TRAIN TRAJECTORY AND THE PHASE-SENSITIVE TRACK CIRCUIT Russian patent published in 1994 - IPC

FIELD: railway transport. SUBSTANCE: during the train movement the preset difference of phases of the signal current at the beginning and at the end of the track circuit are compared and fixed. The device has two control units of the signal zero value, two flip-flops, five counters, a pulse generator, three OR elements, AND-OR element and two AND elements. The counters are made in the form of Johnson counters. EFFECT: enhanced control of idleness of the train trajectory. 2 cl, 3 dwg