Traffic light dimming technique and circuitry

Details Traffic light dimming technique and circuitry Traffic light dimming technique and circuitry

1980-01-07

1981-10-06

La Roche, Eugene R.

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Plural discharge devices and/or rectifiers in the supply...

307252B, 307 41, 315159, 315199, 315208, 315317, H05B 3702, H05B 3906

Patent

active

042937965

ABSTRACT:
A traffic light control circuit of the type utilizing solid state thyristor switches with their control terminals driven by a diode bridge trigger network that includes switches for selectively interrupting one or both legs of the trigger network for energizing the traffic lights with either full wave power for normal daytime operation or half-wave power for night time operation at reduced brightness, thereby providing power savings for night time operation.

REFERENCES:
patent: 3500456 (1970-03-01), Ross
patent: 4160192 (1979-07-01), McAllise

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