Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit – Plural load device systems
Patent
1984-10-10
1986-09-23
Chatmon, Saxfield
Electric lamp and discharge devices: systems
With cathode or cathode heater supply circuit
Plural load device systems
315 94, 315105, 315278, 315227R, 333 32, H05B 3900, H05B 4114
Patent
active
046137920
ABSTRACT:
A device to reduce power consumption in a rapid-start fluorescent lighting fixture having one or more lamps and a conventional ballast. The device includes a step-up isolation transformer, a capacitor connected in parallel with a bleed resistor and in series with a protective fuse all across the transformer. The device being mounted external of the ballast and wired in series between the ballast and the filament of a lamp to present a symmetrical load to the ballast circuit. In one embodiment the capacitor of the device is connected between the primary and secondary windings of the transformer by taps intermediate of the windings with an optimum connection at the center taps of the windings. In a second embodiment the capacitor is connected between either lead of the primary winding of the transformer and the center tap of the secondary winding. In a third embodiment the connection of the capacitor is made between either input lead of the transformer's primary winding and the electrically opposite lead of the transformer's secondary winding.
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