DEVICE FOR SWITCHING CODE CURRENT TRACK CIRCUITS Russian patent published in 1997 - IPC

FIELD: railway transport; digit code automatic block system. SUBSTANCE: device has transmitting relay. Load is connected with output of non-contact switch member through first closing contact of relay. Supply source is connected to relay excitation circuit through closing contact of code transmitter and is connected through second closing contact of relay to inputs of first and second pulse leading and trailing edge delay elements whose outputs are connected to corresponding inputs of flip-flop whose output is connected to control input of non-contact switching member through amplifier and matching unit. Supply source is connected through change-over switch, with time delay control input of second delay element whose other output is connected to relay self-locking input. EFFECT: enlarged operating capabilities. 2 dwg