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Class Information
Number: 315/223
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit > Periodic switch in the primary circuit of the supply transformer > Condenser or inductance in the primary circuit
Description: Systems having a condenser or an inductance connected in the primary circuit of the transformer.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7545103 |
Cold-cathode tube lighting device for use in a plurality of cold-cathode tubes lit by one low-impedance power source |
Jun. 9, 2009 |
| 7339326 |
DC/AC converter for supplying two gas discharge lamps |
Mar. 4, 2008 |
| 6914391 |
Illuminating device |
Jul. 5, 2005 |
| 6870324 |
Method for color mixing with arc stability and straightening of HID lamps operated at high frequencies using duty cycle modulation |
Mar. 22, 2005 |
| 6856095 |
High frequency heating device |
Feb. 15, 2005 |
| RE38547 |
Frequency-modulated converter with a series-parallel resonance |
Jul. 6, 2004 |
| 6617807 |
Discharge lamp lighting circuit for a plurality of discharge lamps |
Sep. 9, 2003 |
| 6329757 |
High frequency transistor oscillator system |
Dec. 11, 2001 |
| 6150768 |
Ballast with active power factor correction |
Nov. 21, 2000 |
| 6147459 |
Voltage-controlled ballast for gas-discharge lamps |
Nov. 14, 2000 |
| 5925989 |
Buck converter switching scheme |
Jul. 20, 1999 |
| 5841241 |
Electronic ballast for fluorescent lamps |
Nov. 24, 1998 |
| 5561349 |
Frequency-modulated converter with a series-parallel resonance |
Oct. 1, 1996 |
| 5510680 |
Electronic ballast with special voltage waveforms |
Apr. 23, 1996 |
| 5510681 |
Operating circuit for gas discharge lamps |
Apr. 23, 1996 |
| 5449981 |
Electronic ballast and power controller |
Sep. 12, 1995 |
| 5422546 |
Dimmable parallel-resonant electric ballast |
Jun. 6, 1995 |
| 5386181 |
Swept frequency switching excitation supply for gas discharge tubes |
Jan. 31, 1995 |
| 5309350 |
Push-pull inverter |
May. 3, 1994 |
| 5262700 |
Fluorescent lighting means |
Nov. 16, 1993 |
| 5231333 |
Switching excitation supply for gas discharge tubes having means for eliminating the bubble effect |
Jul. 27, 1993 |
| 5225741 |
Electronic ballast and power controller |
Jul. 6, 1993 |
| 5162703 |
Flashing light warning apparatus |
Nov. 10, 1992 |
| 5134344 |
Ballast circuits for gas discharge lamps |
Jul. 28, 1992 |
| 5130609 |
Illuminating device incorporating gas-filled chambers |
Jul. 14, 1992 |
| 5115168 |
Power supply for microwave discharge light source |
May. 19, 1992 |
| 5109328 |
Push-pull inverter employing current feedback |
Apr. 28, 1992 |
| 5103139 |
Lamp starting and operating procedure in electronic ballast |
Apr. 7, 1992 |
| 5099407 |
Inverter with power factor correction circuit |
Mar. 24, 1992 |
| 5084652 |
Fluorescent lamp lighting apparatus |
Jan. 28, 1992 |
| 5053682 |
Power supply for microwave discharge light source |
Oct. 1, 1991 |
| 5051662 |
Fluorescent lamp system |
Sep. 24, 1991 |
| 5032767 |
High frequency oscillator-inverter with improved regenerative power supply |
Jul. 16, 1991 |
| 5023519 |
Circuit for starting and operating a gas discharge lamp |
Jun. 11, 1991 |
| 4988922 |
Power supply for microwave discharge light source |
Jan. 29, 1991 |
| 4947821 |
Ignition system |
Aug. 14, 1990 |
| 4916362 |
Excitation supply for gas discharge tubes |
Apr. 10, 1990 |
| 4891561 |
Neon tube lighting device |
Jan. 2, 1990 |
| 4769578 |
High-pressure sodium discharge lamp |
Sep. 6, 1988 |
| 4701671 |
High-frequency oscillator-inverter ballast circuit for discharge lamps |
Oct. 20, 1987 |
| 4700112 |
Fluorescent lamp lighting circuit |
Oct. 13, 1987 |
| 4684851 |
DC/AC converter for feeding a metal vapor discharge tube |
Aug. 4, 1987 |
| 4678968 |
High intensity discharge lamp starting and operating apparatus |
Jul. 7, 1987 |
| 4644459 |
Electronic inverter having magnitude-controllable output |
Feb. 17, 1987 |
| 4609850 |
Current driven gain controlled electronic ballast system |
Sep. 2, 1986 |
| 4595863 |
D.C. luminous tube system |
Jun. 17, 1986 |
| 4585974 |
Varible frequency current control device for discharge lamps |
Apr. 29, 1986 |
| 4562382 |
Solid-state inverter including a multiple core transformer |
Dec. 31, 1985 |
| 4560908 |
High-frequency oscillator-inverter ballast circuit for discharge lamps |
Dec. 24, 1985 |
| 4544863 |
Power supply apparatus for fluorescent lamp |
Oct. 1, 1985 |
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