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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 |
| 5121032 |
Power supply for turning on small fluorescent light of liquid crystal display TV |
Jun. 9, 1992 |
| 5103139 |
Lamp starting and operating procedure in electronic ballast |
Apr. 7, 1992 |
| 5103138 |
Switching excitation supply for gas discharge tubes having means for eliminating the bubble effect |
Apr. 7, 1992 |
| 5097182 |
Power supply for a gas discharge lamp |
Mar. 17, 1992 |
| 5087862 |
Discharge lamp lighting apparatus for controlling voltage of switching transistor by raising starting voltage |
Feb. 11, 1992 |
| 5087860 |
Power supply circuit for gas discharge tube |
Feb. 11, 1992 |
| 5087859 |
Switching arrangement for high pressure discharge lamp |
Feb. 11, 1992 |
| 5084652 |
Fluorescent lamp lighting apparatus |
Jan. 28, 1992 |
| 5084653 |
Power-line-isolated dimmable electronic ballast |
Jan. 28, 1992 |
| 5075598 |
Power supply circuit for gas discharge tube |
Dec. 24, 1991 |
| 5072155 |
Rare gas discharge fluorescent lamp device |
Dec. 10, 1991 |
| 5065074 |
Fluorescent tube driver and lighting system |
Nov. 12, 1991 |
| 5063331 |
High frequency oscillator-inverter circuit for discharge lamps |
Nov. 5, 1991 |
| 5057748 |
Power supply circuit for gas discharge tube |
Oct. 15, 1991 |
| 5055993 |
Invertor apparatus |
Oct. 8, 1991 |
| 5053681 |
Remote electrical converter |
Oct. 1, 1991 |
| 5051667 |
Arc interrupting lamp ballast |
Sep. 24, 1991 |
| 5051662 |
Fluorescent lamp system |
Sep. 24, 1991 |
| 5051661 |
Protective circuit for fluorescent lamp stabilizer |
Sep. 24, 1991 |
| 5051660 |
Circuit arrangement for operating a gas discharge lamp on a direct-current source |
Sep. 24, 1991 |
| 5049788 |
Lighting device of fluorescent lamp |
Sep. 17, 1991 |
| 5049783 |
Electronic ballast device for fluorescent lamps |
Sep. 17, 1991 |
| 5045760 |
Neon sign transformer |
Sep. 3, 1991 |
| 5043634 |
Pulsed light source |
Aug. 27, 1991 |
| 5041766 |
Power-factor-controlled electronic ballast |
Aug. 20, 1991 |
| 5039919 |
Control arrangement for electronic ballast |
Aug. 13, 1991 |
| 5036254 |
Inverter having a broad output-control range |
Jul. 30, 1991 |
| 5034663 |
Power source for metal halide lamps and the like |
Jul. 23, 1991 |
| 5032767 |
High frequency oscillator-inverter with improved regenerative power supply |
Jul. 16, 1991 |
| 5030883 |
Constant spark rate system and method |
Jul. 9, 1991 |
| 5028846 |
Single-ended ballast circuit |
Jul. 2, 1991 |
| 5027040 |
EL operating power supply circuit |
Jun. 25, 1991 |
| 5023518 |
Ballast circuit for gaseous discharge lamp |
Jun. 11, 1991 |
| 5023519 |
Circuit for starting and operating a gas discharge lamp |
Jun. 11, 1991 |
| 5023516 |
Discharge lamp operation apparatus |
Jun. 11, 1991 |
| 5021716 |
Forward inverter ballast circuit |
Jun. 4, 1991 |
| 5019748 |
Method for making an electroluminescent panel lamp as well as panel lamp produced thereby |
May. 28, 1991 |
| 5017839 |
Illumination system having a low-power high-pressure discharge lamp and power supply combination |
May. 21, 1991 |
| 5017840 |
Ignitor circuit for discharge lamps with novel ballast |
May. 21, 1991 |
| 5017838 |
Electronic incandescent lighting product |
May. 21, 1991 |
| 5008598 |
Fluorescent lighting control circuit |
Apr. 16, 1991 |
| 5008596 |
Fluorescent lamp high frequency operating circuit |
Apr. 16, 1991 |
| 5001386 |
Circuit for dimming gas discharge lamps without introducing striations |
Mar. 19, 1991 |
| 4999545 |
Luminaire system |
Mar. 12, 1991 |
| 4998047 |
Ignition circuit for explosive devices and the like |
Mar. 5, 1991 |
| 4998045 |
Fluorescent lamp dimmer |
Mar. 5, 1991 |
| 4994717 |
Electronic stabilizer for a fluorescent lamp |
Feb. 19, 1991 |
| 4992702 |
Inverter capable of controlling operating frequency |
Feb. 12, 1991 |
| 4988924 |
Circuit arrangement for controlling the brightness of a lamp |
Jan. 29, 1991 |
| 4982137 |
Apparatus for igniting a discharge lamp including circuitry for preventing cataphoresis phenomenon generation |
Jan. 1, 1991 |
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