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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 |
| 4677345 |
Inverter circuits |
Jun. 30, 1987 |
| 4663570 |
High frequency gas discharge lamp dimming ballast |
May. 5, 1987 |
| 4645979 |
Display device with discharge lamp |
Feb. 24, 1987 |
| 4642525 |
Transient control circuit for fluorescent lamp systems |
Feb. 10, 1987 |
| 4629946 |
Neon sign control device |
Dec. 16, 1986 |
| 4613796 |
Single transistor oscillator ballast circuit |
Sep. 23, 1986 |
| 4609850 |
Current driven gain controlled electronic ballast system |
Sep. 2, 1986 |
| 4581562 |
Extra-high-efficiency fluorescent lamp ballast |
Apr. 8, 1986 |
| 4563616 |
Non-saturating, self-driven switching inverter for gas discharge devices |
Jan. 7, 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 |
| 4559478 |
Fluorescent lamp circuit |
Dec. 17, 1985 |
| 4547705 |
Discharge lamp lightening device |
Oct. 15, 1985 |
| 4538093 |
Variable frequency start circuit for discharge lamp with preheatable electrodes |
Aug. 27, 1985 |
| 4535271 |
High frequency circuit for operating a high-intensity, gaseous discharge lamp |
Aug. 13, 1985 |
| 4525650 |
Starting and operating method and apparatus for discharge lamps |
Jun. 25, 1985 |
| 4523131 |
Dimmable electronic gas discharge lamp ballast |
Jun. 11, 1985 |
| 4523128 |
Remote control of dimmable electronic gas discharge lamp ballasts |
Jun. 11, 1985 |
| 4513364 |
Thermally controllable variable frequency inverter |
Apr. 23, 1985 |
| 4513226 |
Electronic ballast-inverter circuit |
Apr. 23, 1985 |
| 4508996 |
High frequency supply system for gas discharge lamps and electronic ballast therefor |
Apr. 2, 1985 |
| 4503361 |
Electronic ballast system |
Mar. 5, 1985 |
| 4498031 |
Variable frequency current control device for discharge lamps |
Feb. 5, 1985 |
| 4495446 |
Lighting unit with improved control sequence |
Jan. 22, 1985 |
| 4492897 |
Means for limiting and controlling the current of a discharge lamp |
Jan. 8, 1985 |
| 4492899 |
Solid state regulated power supply system for cold cathode luminous tube |
Jan. 8, 1985 |
| 4484108 |
High frequency ballast-ignition system for discharge lamps |
Nov. 20, 1984 |
| 4472661 |
High voltage, low power transformer for efficiently firing a gas discharge luminous display |
Sep. 18, 1984 |
| 4471268 |
Lighting unit having power supply with improved switching means |
Sep. 11, 1984 |
| 4463286 |
Lightweight electronic ballast for fluorescent lamps |
Jul. 31, 1984 |
| 4459516 |
Line operated fluorescent lamp inverter ballast |
Jul. 10, 1984 |
| 4453109 |
Magnetic transformer switch and combination thereof with a discharge lamp |
Jun. 5, 1984 |
| 4441054 |
Stabilized dimming circuit for lamp ballasts |
Apr. 3, 1984 |
| 4424468 |
Inverter ballast circuit with shoot through prevention, auto transformer coupling and overload prevention |
Jan. 3, 1984 |
| 4418375 |
Solid state ignition system |
Nov. 29, 1983 |
| 4414493 |
Light dimmer for solid state ballast |
Nov. 8, 1983 |
| 4414492 |
Electronic ballast system |
Nov. 8, 1983 |
| 4414491 |
Current limiting power supply for electron discharge lamps |
Nov. 8, 1983 |
| 4408270 |
Stored charge inverter circuit with rapid switching |
Oct. 4, 1983 |
| 4404952 |
Magnet ignition device |
Sep. 20, 1983 |
| 4396870 |
Electronic flash device |
Aug. 2, 1983 |
| 4393335 |
Electronic flash device |
Jul. 12, 1983 |
| 4392087 |
Two-wire electronic dimming ballast for gaseous discharge lamps |
Jul. 5, 1983 |
| 4355263 |
Ignition circuit for explosive devices and the like |
Oct. 19, 1982 |
| 4353116 |
Direct current to alternating current converter |
Oct. 5, 1982 |
| 4348615 |
Discharge lamp operating circuit |
Sep. 7, 1982 |
| 4339692 |
Power supply for HID lamp |
Jul. 13, 1982 |
| 4327308 |
Simplified power source for fluorescent lamps |
Apr. 27, 1982 |
| 4322789 |
Static converter of symmetrical type |
Mar. 30, 1982 |
| 4319164 |
Power factor compensating electroluminescent lamp DC/AC inverter |
Mar. 9, 1982 |
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