Electric lamp and discharge devices: systems – Condenser in the supply circuit – Plural load device systems
Patent
1998-09-22
1999-08-10
Philogene, Haissa
Electric lamp and discharge devices: systems
Condenser in the supply circuit
Plural load device systems
315200A, 315200R, 315101, 315244, 315DIG4, H05B 3700
Patent
active
059363568
ABSTRACT:
A fluorescent lamp flashing circuit is comprised of a fluorescent lamp to which an alternating supply voltage source is connected through a series connected loading reactance device which provides current limiting. The heaters of the fluorescent lamp are independently fed. A switching device disconnects and reconnects the alternating supply voltage at a predetermined frequency rate which is determined by a control circuit which controls a switching device. When the switching device is closed, the fluorescent lamp is bypassed through a full wave rectifier bridge and the reactance device is connected in parallel with the supply voltage source and with a bleeding resistance to load the bridge and to form a resonant circuit to maintain the loading reactance device constant and permitting an energy exchange between the supply voltage source and the loading reactance device in a resonant mode thereby maintaining a sine wave form and minimizing loss. When the switching device is in a non-conductive open state, the lamp is "on".
REFERENCES:
patent: 3710185 (1973-01-01), Switsen
patent: 5111115 (1992-05-01), Ball et al.
patent: 5616992 (1997-04-01), Bildgen
Interballast Inc.
Philogene Haissa
Townsend Marvin S.
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