Lamp circuit

Details Lamp circuit Lamp circuit

1977-11-04

1978-11-28

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

315DIG5, 315DIG7, 315205, 315239, 315257, 315265, 315278, 331113A, H05B 3702, H05B 3904, H05B 4136

Patent

active

041277988

ABSTRACT:
A system for operating gas discharge lamps at high frequency from a high voltage supply, typically 115 V AC with a 160 watt, 25,000 Hz output. The system provides efficient conversion, having the capability of driving any number of lamps up to maximum wattage, inherent open-cirucit and short circuit protection, and higher efficacy from the lamps. Filament power may or may not be used. Filament power is not necessary under conditions when the lamps are forced into a glow discharge to charge each cycle through the use of a tuned resonant circuit. An unsaturated inverter provides fast cut-off times. Dimming capabilities may be provided.

REFERENCES:
patent: 3146406 (1964-08-01), Wilting
patent: 3754160 (1973-08-01), Jensen
patent: 3769545 (1973-10-01), Crane
patent: 3927363 (1975-12-01), Mitchell et al.
patent: 3953780 (1976-04-01), Anderson et al.
patent: 4060751 (1977-11-01), Anderson
patent: 4060752 (1977-11-01), Walker

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