THREE-FIGURE LIGHT DIODE TRAFFIC LIGHTS Russian patent published in 2004 - IPC

FIELD: engineering of regulating devices mounted along routes of trains and locomotives.

SUBSTANCE: device has contacts of first and second signal relays, transistor, alternating voltage source and light diode circuit. The latter has serial connection of resistor and balanced K first light diodes of one color, in parallel to each of which are oppositely switched second K light diodes of another color. Light diode circuit is connected between on of outputs of alternating voltage source and common contact of first signal relay, back contact of which is connected to common contact of second signal relay, which is by its frontal contact connected to another pole of source. Two diodes are inserted into traffic lights systems. Frontal contact of first signal relay is connected to cathode of first inserted diode, and back contact of second signal relay is connected to anode of second inserted diode. Anode of first diode is connected to cathode of second diode and to other pole of source. Selected circuit for connection of light diode circuit to source though contacts of signal relays and diodes makes possible when having light diodes of green and red colors to receive three colors of light indications: green, red and yellow.

EFFECT: substantially simplified construction of traffic lights system, lower manufacture costs and lesser maintenance and operation costs.

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