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Class Information
Number: 315/209R
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit
Description:
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5539281 |
Externally dimmable electronic ballast |
Jul. 23, 1996 |
| 5530321 |
Power supply for a gas discharge lamp |
Jun. 25, 1996 |
| 5528111 |
Ballast circuit for powering gas discharge lamp |
Jun. 18, 1996 |
| 5528117 |
Electronic lamp ballast with driving frequency between load resonant frequencies |
Jun. 18, 1996 |
| 5525869 |
Efficient battery operated inverter circuit for capacitive loads such as electroluminescent lamps |
Jun. 11, 1996 |
| 5525870 |
Control apparatus of fluorescent lamp |
Jun. 11, 1996 |
| 5519289 |
Electronic ballast with lamp current correction circuit |
May. 21, 1996 |
| 5512801 |
Ballast for instant-start parallel-connected lamps |
Apr. 30, 1996 |
| 5510680 |
Electronic ballast with special voltage waveforms |
Apr. 23, 1996 |
| 5504398 |
Dimming controller for a fluorescent lamp |
Apr. 2, 1996 |
| 5502357 |
Low cost inverter for EL lamp |
Mar. 26, 1996 |
| 5502423 |
Discharge lamp lighting device |
Mar. 26, 1996 |
| 5502635 |
Parallel resonant integrated inverter ballast for gas discharge lamps |
Mar. 26, 1996 |
| 5500576 |
Low height ballast for fluorescent lamps |
Mar. 19, 1996 |
| 5497051 |
Current supply means for a laser flash lamp |
Mar. 5, 1996 |
| 5495149 |
Power supply |
Feb. 27, 1996 |
| 5493181 |
Capacitive lamp out detector |
Feb. 20, 1996 |
| 5491385 |
Instant-on screw-in fluorescent lamp |
Feb. 13, 1996 |
| 5491386 |
Stable high frequency high-pressure discharge lamp lighting device avoiding acoustic resonance |
Feb. 13, 1996 |
| 5489823 |
Electronic ballast for gas discharge lamp |
Feb. 6, 1996 |
| 5488269 |
Multi-resonant boost high power factor circuit |
Jan. 30, 1996 |
| 5487088 |
Apparatus for monitoring lamp system status |
Jan. 23, 1996 |
| 5485060 |
Electronic reactor for the supply of discharge lamps with an oscillator circuit to limit the crest factor and to correct the power factor |
Jan. 16, 1996 |
| 5485061 |
Discharge lamp lighting device capable of preventing a flicker due to arc movement |
Jan. 16, 1996 |
| 5483124 |
Neon illumination system |
Jan. 9, 1996 |
| 5483125 |
Ballast circuit for a gas discharge lamp having a cathode pre-heat arrangement |
Jan. 9, 1996 |
| 5483126 |
Method of controlling the color temperature in a sodium high-pressure discharge lamp, and apparatus to carry out the method |
Jan. 9, 1996 |
| 5481160 |
Electronic ballast with FET bridge inverter |
Jan. 2, 1996 |
| 5481162 |
Method of supplying current to a sodium high-pressure discharge lamp, and current supply system |
Jan. 2, 1996 |
| 5479074 |
Electronic ballast with pre-conditioner circuit |
Dec. 26, 1995 |
| 5479076 |
Current mode restart circuit for a dc arc lamp |
Dec. 26, 1995 |
| 5477108 |
Control device and methods of making and operating the same |
Dec. 19, 1995 |
| 5477112 |
Ballasting network with integral trap |
Dec. 19, 1995 |
| 5475284 |
Ballast containing circuit for measuring increase in DC voltage component |
Dec. 12, 1995 |
| 5471116 |
General assembly for controlling light intensity of a gas discharge lamp |
Nov. 28, 1995 |
| 5471117 |
Low power unity power factor ballast |
Nov. 28, 1995 |
| 5463281 |
Circuit arrangement for operating a high-pressure discharge lamp |
Oct. 31, 1995 |
| 5463282 |
Electronic supply for igniting and operating a high/pressure discharge lamp |
Oct. 31, 1995 |
| 5463283 |
Drive circuit for electroluminescent lamp |
Oct. 31, 1995 |
| 5463285 |
Variable capacitor with very fine resolution |
Oct. 31, 1995 |
| 5461286 |
Circuit arrangement for operating a low-pressure discharge lamp, typically a fluorescent lamp, from a low-voltage source |
Oct. 24, 1995 |
| 5461287 |
Booster driven inverter ballast employing the output from the inverter to trigger the booster |
Oct. 24, 1995 |
| 5451842 |
Electro-luminescent seasonal light apparatus |
Sep. 19, 1995 |
| 5451843 |
Apparatus and method for providing bilevel illumination |
Sep. 19, 1995 |
| 5451845 |
Device for protecting a ballast circuit from excess voltage |
Sep. 19, 1995 |
| 5449979 |
Inverter power supply |
Sep. 12, 1995 |
| 5446346 |
Electronic ballast with controlled DC supply voltage |
Aug. 29, 1995 |
| 5446347 |
Electronic ballast with special DC supply |
Aug. 29, 1995 |
| 5444310 |
Apparatus for operating discharge lamps |
Aug. 22, 1995 |
| 5444335 |
Method and apparatus for controlling an image display having gas discharge lamps |
Aug. 22, 1995 |
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