RAILWAY CROSSING LIGHT-EMITTING DIODE LIGHT SIGNAL Russian patent published in 2006 - IPC B61L5/12 B61L23/00 

FIELD: railway transport; traffic lights.

SUBSTANCE: invention relates to control devices installed along tracks. Proposed device contains dc voltage source, signal relay contacts and first light-emitting diode circuit 1 consisting of light-emitting diodes connected in aiding, second light-emitting diode circuit 2, two transistors, two capacitors and four resistors. Front contact of signal relay is connected in parallel through first resistor 6 to input terminal of first light-emitting diode circuit, and through second resistor 7, to input terminal of second light-emitting diode circuit. Output terminal of first light-emitting diode circuit is connected to collector of first transistor 8 and, from point of connection of light-emitting diodes of first light-emitting diode circuit and first resistor, to first output of first capacitor. Second output of first capacitor is connected in parallel through third resistor to front contact of signal relay and to base of second transistor 11. Output terminal of second light-emitting diode circuit is connected to collector of second transistor and, from point of connection of light-emitting diodes of second light-emitting diode circuit and second resistor, to first output of second capacitor. Second output of second capacitor is connected in parallel through fourth resistor to front contact of signal relay and to base of first transistor, and emitters of both transistors are connected to other pole of dc voltage source.

EFFECT: simplified circuit and design of light signal.

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