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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 |
| 6204611 |
Pulse ignition apparatus for a discharge lamp |
Mar. 20, 2001 |
| 6191956 |
Circuit for generating high voltage to ignite oil or gas or operative neon tubes |
Feb. 20, 2001 |
| 6191537 |
Solid state resonance igniter for control of the number of high voltage pulses for hot restrike of discharge lamps |
Feb. 20, 2001 |
| 6181074 |
Operating circuit for discharge lamps with switchable operating states |
Jan. 30, 2001 |
| 6181081 |
Ignition device for a discharge lamp and method for igniting a discharge lamp |
Jan. 30, 2001 |
| 6181076 |
Apparatus and method for operating a high intensity gas discharge lamp ballast |
Jan. 30, 2001 |
| 6181075 |
Power supply circuit for gas discharge tube |
Jan. 30, 2001 |
| 6172464 |
Compact screw-in fluorescent lamp |
Jan. 9, 2001 |
| 6160357 |
Bridge commutator with separate drive oscillator for electrodeless lamps |
Dec. 12, 2000 |
| 6150768 |
Ballast with active power factor correction |
Nov. 21, 2000 |
| 6147460 |
Flash apparatus |
Nov. 14, 2000 |
| 6147457 |
Incandescent lamp with continuous high-frequency oscillations |
Nov. 14, 2000 |
| 6144167 |
Circuit arrangement |
Nov. 7, 2000 |
| 6144168 |
Circuit arrangement for operation of a high-pressure gas discharge lamp on alternating current |
Nov. 7, 2000 |
| 6144175 |
Low-voltage ballast-free energy-efficient ultraviolet material treatment and purification system and method |
Nov. 7, 2000 |
| 6137241 |
Starting switch circuit for a fluorescent lamp |
Oct. 24, 2000 |
| 6137235 |
Low-resistance bipolar bridge circuit |
Oct. 24, 2000 |
| 6121732 |
Neon lamp power supply for producing a bubble-free discharge without promoting mercury migration or premature core saturation |
Sep. 19, 2000 |
| 6121733 |
Controlled inverter-type fluorescent lamp ballast |
Sep. 19, 2000 |
| 6118225 |
High frequency discharge lamp operating circuit with resonant power factor correction circuit |
Sep. 12, 2000 |
| 6118223 |
Power supply for discharge lamps with balanced resonant circuit |
Sep. 12, 2000 |
| 6114814 |
Apparatus for controlling a discharge lamp in a backlighted display |
Sep. 5, 2000 |
| 6111365 |
Fast starting, surge limited, electronic ballast |
Aug. 29, 2000 |
| 6107744 |
Back-up electrical systems |
Aug. 22, 2000 |
| 6107749 |
FET-bipolar electronic ballast |
Aug. 22, 2000 |
| 6107750 |
Converter/inverter circuit having a single switching element |
Aug. 22, 2000 |
| 6104142 |
Circuit arrangement for operating low-pressure discharge lamps |
Aug. 15, 2000 |
| 6104141 |
Inventer-ballast using a piezoelectric transformer |
Aug. 15, 2000 |
| 6100644 |
Dimmable and non-dimmable electronic ballast for plural fluorescent lamps |
Aug. 8, 2000 |
| 6100642 |
Discharge lamp operating electronic device for improving the reliability, efficiency, and life of a hot-cathode discharge lamp |
Aug. 8, 2000 |
| 6091206 |
Electronic ballast system for fluorescent lamps |
Jul. 18, 2000 |
| 6081439 |
Inverter provided with output regulating mechanism |
Jun. 27, 2000 |
| 6078144 |
Electronic ballast with inrush current limiting |
Jun. 20, 2000 |
| 6069453 |
Ballast circuit for reducing striations in a discharge lamp |
May. 30, 2000 |
| 6069458 |
Power supply circuit device for a high intensity discharge lamp that repetitively lights the lamp using a pulse-by-pulse mode current limiting function |
May. 30, 2000 |
| 6069455 |
Ballast having a selectively resonant circuit |
May. 30, 2000 |
| 6060844 |
Method and apparatus of an improved electronics ballast circuit |
May. 9, 2000 |
| 6057652 |
Power supply for supplying AC output power |
May. 2, 2000 |
| 6054813 |
Neon discharging lamp lighting apparatus with improved lighting |
Apr. 25, 2000 |
| 6051934 |
Gas discharge lamp ballast circuit with high speed gate drive circuitry |
Apr. 18, 2000 |
| 6049177 |
Single fluorescent lamp ballast for simultaneous operation of different lamps in series or parallel |
Apr. 11, 2000 |
| 6031341 |
Miniaturized transformer and inverter circuit and discharge tube glow circuit including such miniaturized transformer |
Feb. 29, 2000 |
| 6018220 |
Gas discharge lamp ballast circuit with a non-electrolytic smoothing capacitor for rectified current |
Jan. 25, 2000 |
| 6008591 |
Circuit for starting an hid lamp |
Dec. 28, 1999 |
| 6008589 |
Single-switch, high power factor, ac-to-ac power converters |
Dec. 28, 1999 |
| 6005355 |
Electronic ballast system for fluorescent lamps |
Dec. 21, 1999 |
| 6002210 |
Electronic ballast with controlled-magnitude output voltage |
Dec. 14, 1999 |
| 5998936 |
Fire-initiation-safe lighting system |
Dec. 7, 1999 |
| 5994847 |
Electronic ballast with lamp current valley-fill power factor correction |
Nov. 30, 1999 |
| 5986410 |
Integrated circuit for use in a ballast circuit for a gas discharge lamp |
Nov. 16, 1999 |
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