DEVICE FOR SWITCHING AND CONTROLLING TWO-FILAMENT LAMPS FOR TRAFFIC LIGHTS Russian patent published in 2005 - IPC

FIELD: traffic lights.

SUBSTANCE: device has power source, signal control relay, safety device, light relay, cable line, signal transformer, relay for switching to reserve filament and is additionally provided with light relay for controlling integrity of main filament of lamp, two capacitors, resistor and diode. To first pole of power source through safety device, light relay winding, first capacitor, signal relay contact first wire of line is connected. To second wire of line second pole of power source is connected. To end of line through second capacitor first and second input outputs of signal transformer are connected, and also a circuit is connected, consisting of serially connected frontal contact of relay for switching to reserve filament of resistor and diode. To first and second outputs of signal transformer through switching relay winding main lamp filament if connected. To third output of signal transformer through end contact of switching relay reserve filament of lamp is connected. To common contact of signal relay and second linear wire a winding of light relay of main filament integrity is connected.

EFFECT: higher effectiveness.

1 dwg