SWITCH DRIVE CONTROL AND CHECKING CIRCUIT Russian patent published in 2002 - IPC

FIELD: railway transport. SUBSTANCE: according to invention, two controllable signaling devices are provided for identification of position of switch drive. Said signaling devices and dc sources are connected with one or other pairs of adjacent drive contacts jointly switched when changing over the drive. Proposed circuit is divided into change- over unit including change-over devices and check unit including signaling devices M1, M2. Inputs and outputs of signaling devices are brought out independently from each other from change-over module including both parts of circuit. Outputs of both parts of circuit are connected by bridge contacts to provided preset relationships between function of change-over checking for all available types of drive. EFFECT: enlarged operating capabilities. 15 cl, 13 dwg