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Class Information
Number: 315/219
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit > Periodic switch in the primary circuit of the supply transformer
Description: Systems provided with a transformer connected between the source of supply and the load device for supplying electric current or potential to the load device and having the periodic switch connected in the primary circuit of the transformer so as to periodically interrupt the primary circuit.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5466992 |
Inverter ballast circuit featuring current regulation over wide lamp load range |
Nov. 14, 1995 |
| 5465029 |
Power control apparatus for discharging lamp and method thereof |
Nov. 7, 1995 |
| 5461286 |
Circuit arrangement for operating a low-pressure discharge lamp, typically a fluorescent lamp, from a low-voltage source |
Oct. 24, 1995 |
| 5459375 |
Electronic ballast with high-frequency-aided power-factor-correction |
Oct. 17, 1995 |
| 5457360 |
Dimming circuit for powering gas discharge lamps |
Oct. 10, 1995 |
| 5453665 |
Single transistor electronic ballast |
Sep. 26, 1995 |
| 5453668 |
Method and circuitry for producing dynamic illumination of discharge lamp |
Sep. 26, 1995 |
| 5449979 |
Inverter power supply |
Sep. 12, 1995 |
| 5448137 |
Electronic energy converter having two resonant circuits |
Sep. 5, 1995 |
| 5446347 |
Electronic ballast with special DC supply |
Aug. 29, 1995 |
| 5446346 |
Electronic ballast with controlled DC supply voltage |
Aug. 29, 1995 |
| 5440209 |
Driven full-bridge inverter ballast |
Aug. 8, 1995 |
| 5438243 |
Electronic ballast for instant start gas discharge lamps |
Aug. 1, 1995 |
| 5438242 |
Apparatus for controlling the brightness of a magnetron-excited lamp |
Aug. 1, 1995 |
| 5428633 |
He-Ne laser driving power supply with means for interrupting feedback control at driving start of the laser |
Jun. 27, 1995 |
| 5426349 |
Electronic ballast with two-transistor switching device |
Jun. 20, 1995 |
| 5424615 |
Discharge lamp ballast operating on induced voltage in the primary winding of a boosting transformer |
Jun. 13, 1995 |
| 5424614 |
Modified half-bridge parallel-loaded series resonant converter topology for electronic ballast |
Jun. 13, 1995 |
| 5422546 |
Dimmable parallel-resonant electric ballast |
Jun. 6, 1995 |
| 5416388 |
Electronic ballast with two transistors and two transformers |
May. 16, 1995 |
| 5416387 |
Single stage, high power factor, gas discharge lamp ballast |
May. 16, 1995 |
| 5416386 |
Electronic ballast with controlled DC rail voltage |
May. 16, 1995 |
| 5414327 |
High frequency discharge lamp operating circuit with frequency control of the ignition voltage |
May. 9, 1995 |
| 5412287 |
Circuit for powering a gas discharge lamp |
May. 2, 1995 |
| 5406174 |
Discharge lamp operating circuit with frequency control of dimming and lamp electrode heating |
Apr. 11, 1995 |
| 5404082 |
High frequency inverter with power-line-controlled frequency modulation |
Apr. 4, 1995 |
| 5402043 |
Controlled driven series-resonant ballast |
Mar. 28, 1995 |
| 5399943 |
Power supply circuit for a discharge lamp |
Mar. 21, 1995 |
| 5399944 |
Ballast circuit for driving gas discharge |
Mar. 21, 1995 |
| 5397965 |
Device for operating a gas discharge lamp |
Mar. 14, 1995 |
| 5394062 |
Lamp ballast circuit with overload detection and ballast operability indication features |
Feb. 28, 1995 |
| 5394061 |
High frequency plasma power source and impedance matching device for supplying power to a semiconductor processing apparatus |
Feb. 28, 1995 |
| 5386181 |
Swept frequency switching excitation supply for gas discharge tubes |
Jan. 31, 1995 |
| 5382882 |
Power supply circuit for a gas discharge lamp |
Jan. 17, 1995 |
| 5374874 |
Electronic ballast with crest factor control |
Dec. 20, 1994 |
| 5371438 |
Energy conversion device having an electronic converter with DC input terminal for delivering a high frequency signal |
Dec. 6, 1994 |
| 5367225 |
High frequency luminous tube power supply having neon-bubble and mercury-migration suppression |
Nov. 22, 1994 |
| 5367223 |
Fluoresent lamp current level controller |
Nov. 22, 1994 |
| 5367224 |
High frequency luminous tube power supply having neon-bubble and mercury-migration suppression |
Nov. 22, 1994 |
| 5363020 |
Electronic power controller |
Nov. 8, 1994 |
| 5363018 |
Ballast circuit equipped with ground fault detector |
Nov. 8, 1994 |
| 5355055 |
Lighting assembly and an electronic ballast therefor |
Oct. 11, 1994 |
| 5352956 |
Power supply for gas discharge tube |
Oct. 4, 1994 |
| 5349268 |
High voltage discharge lamp device |
Sep. 20, 1994 |
| 5349270 |
Transformerless fluorescent lamp operating circuit, particularly for a compact fluorescent lamp, with phase-shifted inverter control |
Sep. 20, 1994 |
| 5349273 |
Dimmer and ground fault interruption for solid state neon supply |
Sep. 20, 1994 |
| 5345146 |
Drive circuit for electroluminescent panels and the like |
Sep. 6, 1994 |
| 5343122 |
Luminaire using incandescent lamp as luminous source |
Aug. 30, 1994 |
| 5343123 |
Series-resonant inverter ballast |
Aug. 30, 1994 |
| 5341068 |
Electronic ballast arrangement for a compact fluorescent lamp |
Aug. 23, 1994 |
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