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| Number | Title | Issue Date |
| 7057345 | Short arc discharge lamp and light source device A short arc discharge lamp has improved starting properties in which there is no danger of damaging the arc tube that surrounds a discharge space and in which the radiant light from the arc tube is not adversely shielded. This is achieved by providing the short arc ... | 06/06/2006 |
| 6756745 | Four-electrode fluorescent lamp and the circuit for arranging the same A four-electrode fluorescent, lamp having four filaments in a fluorescent lamp; each of the filament having two leads for being connected to a positive and a negative electrodes of a power source. A resistor is serially connected between a lead of one selective fila... | 06/29/2004 |
| 6069457 | Method and apparatus for controlling lights and other devices A dimmer for dimming gas discharge and incandescent lamps can be installed in place of a standard wall-mounted light switch and connected to existing wiring. The dimmer has a switch coupling one or more full wave bridge rectifiers to a main AC source and ... | 05/30/2000 |
| 4748381 | Circuit arrangement for A.C. operation of gas discharge lamps A circuit arrangement for A.C. operation of gas discharge lamps comprises a full-wave rectifier (1) connected to an alternating voltage source. The direct voltage is supplied to a combinatorial circuit part (3 to 8) in the form of a direct voltage convert... | 05/31/1988 |
| 4654774 | Low ripple, high power factor a-c to d-c power supply A direct-current power supply circuit for gas discharge lamps includes a rectifier-capacitor bridge having a pair of input terminals and a pair of output terminals. A series input inductor is connected to one of the input terminals of the rectifier-capaci... | 03/31/1987 |
| 4127798 | Lamp circuit 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 wat... | 11/28/1978 |
| 4075476 | Sinusoidal wave oscillator ballast circuit A sinusoidal wave oscillator ballast circuit includes a tuned oscillator coupled to a DC rectifier means coupled by a power factor correction circuit to an AC potential source. The oscillator is coupled to an inductor means including a first and second tr... | 02/21/1978 |
| 4045711 | Tuned oscillator ballast circuit A fluorescent lamp ballast circuit includes a tuned oscillator coupled to a pulsed DC potential source and to a transformer having a first winding directly connected to the oscillator and in series connection with a capacitor to form a series resonant cir... | 08/30/1977 |
