THREE-ASPECT LIGHT-EMITTING DIODE LIGHT SIGNAL Russian patent published in 2004 - IPC

FIELD: railway transport.

SUBSTANCE: invention relates to regulating and warning devices installed along railway tracks. Proposed three-aspect light-emitting diode light signal has light-emitting diode circuit consisting of series-connected aiding K first light-emitting diodes and resistor, first dc voltage source, resistors, common, back and front contacts of first and second signaling relays. Front contact of first signaling relay is connected with plus pole of first dc voltage source whose minus pole is connected to one of outputs of light-emitting diode circuit. Light signal is provided also with second dc voltage source and ac voltage source, and second K light-emitting diodes are placed in light-emitting diode circuit. Back contact of first signaling relay is connected with common contact of second signaling relay whose front contact is connected to first pole of ac voltage source and back contact is connected with minus pole of second dc voltage source where second pole of ac voltage source and plus pole of second dc voltage source are connected to minus pole of first dc source. Second light-emitting diodes are connected in parallel with each of K first light-emitting diodes of light-emitting diode circuit so that anode of each first light-emitting diode is connected with cathode of each second light-emitting diode and cathode of first light-emitting diode is connected with anode of second light-emitting diode.

EFFECT: simplified circuit of device, improved power characteristics of light signal.

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