Power supply and control unit for a light system and a lighting

Details Power supply and control unit for a light system and a lighting Power supply and control unit for a light system and a lighting

1992-03-06

1994-03-01

Pascal, Robert J.

Electric lamp and discharge devices: systems

Plural load device systems

Sequential starting

315360, 315361, 315362, H05B 3700

Patent

active

052912990

ABSTRACT:
The invention relates to a power supply and control unit for a light system, especially an airport approach light system, for making a number of lights go on and out as a progressive light front. The invention is also concerned with a lighting unit (1) suitable for use in combination with this power supply and control unit. To minimize the need for cable laying especially for the light system, the power supply and control unit comprises means (2) for generating clock pulses (b) occurring at a frequency proportional to the rate of progression of the light front; means (3) for generating a control signal (c) comprising recurrent sequences containing a predetermined number of control pulses corresponding to the frequency of the clock pulses and a subsequent portion comprising no control pulses and having a duration equal to one or more cycle times corresponding to the frequency of the clock pulses; and a power stage (4) which is arranged to receive the control signal (c) and a supply (s) from a source of power and to generate at its output voltage pulses (v) in response to the control pulses of the control signal on the basis of said control signal and supply.

REFERENCES:
patent: 4090107 (1978-05-01), Seib
patent: 4422018 (1983-12-01), Bailey
patent: 5150012 (1992-09-01), Pringle et al.
"Direct Line Coupled Sequenced Flashing Lights System" brochure published by ADB Aviation Lighting Systems Leuvensesteenweg 585, B1903 Zaventem, Belgium (four pages).

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