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

FIELD: control devices placed along route of trains and locomotives.

SUBSTANCE: device has two transistor cascades with loads in form of two serially connected inductive collectors, to secondary windings of which groups of light diodes of red and green colors are connected. Transistors are switched by impulse generator through contacts of green and yellow signal relays. With selected connection plan three colors may be received while having only two colors of light diodes.

EFFECT: lower costs, broader functional capabilities.

1 dwg