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Class Information
Number: 315/308
Name: Electric lamp and discharge devices: systems > Current and/or voltage regulation > Automatic regulation > Regulator responsive to plural conditions
Description: Systems wherein the regulating means is responsive to two or more conditions; such as, the current and the voltage of the circuit, or a condition of the load device and the current or voltage of the circuit.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5128592 |
High frequency ballast for gaseous discharge lamps |
Jul. 7, 1992 |
| 5111118 |
Fluorescent lamp controllers |
May. 5, 1992 |
| 5103142 |
Circuit arrangement for ignition and operation of a high pressure gas discharge lamp for motor vehicles |
Apr. 7, 1992 |
| 5103143 |
Process and apparatus for starting a high pressure gas discharge lamp for vehicles |
Apr. 7, 1992 |
| 5101142 |
Solid-state ballast for fluorescent lamp with multiple dimming |
Mar. 31, 1992 |
| 5053683 |
Starting and operating device for controlling a starter that ignites a sodium lamp |
Oct. 1, 1991 |
| 5049790 |
Method and apparatus for operating at least one gas discharge lamp |
Sep. 17, 1991 |
| 5039921 |
Discharge lamp lighting apparatus for driving discharge lamp according to rating thereof |
Aug. 13, 1991 |
| 5036256 |
Arc discharge ballast suitable for automotive applications |
Jul. 30, 1991 |
| 5034663 |
Power source for metal halide lamps and the like |
Jul. 23, 1991 |
| 4999547 |
Ballast for high pressure sodium lamps having constant line and lamp wattage |
Mar. 12, 1991 |
| 4987348 |
Bilevel current limiter |
Jan. 22, 1991 |
| 4965492 |
Lighting control system and module |
Oct. 23, 1990 |
| 4958108 |
Universal fluorescent lamp ballast |
Sep. 18, 1990 |
| 4952849 |
Fluorescent lamp controllers |
Aug. 28, 1990 |
| 4952848 |
Signal generating circuit for ballast control of discharge lamps |
Aug. 28, 1990 |
| 4952846 |
Circuit arrangement for operating a high-pressure sodium discharge lamp |
Aug. 28, 1990 |
| 4949020 |
Lighting control system |
Aug. 14, 1990 |
| 4920302 |
Fluorescent lamp power supply |
Apr. 24, 1990 |
| 4900989 |
Magnetron feeding apparatus and method of controlling the same |
Feb. 13, 1990 |
| 4873471 |
High frequency ballast for gaseous discharge lamps |
Oct. 10, 1989 |
| 4870327 |
High frequency, electronic fluorescent lamp ballast |
Sep. 26, 1989 |
| 4868459 |
Method of and circuit for brightness and temperature-dependent control of an LCD illuminator |
Sep. 19, 1989 |
| 4839566 |
Circuit for supplying power to a dental photopolymerizing apparatus |
Jun. 13, 1989 |
| 4823250 |
Electronic control for light weight, portable x-ray system |
Apr. 18, 1989 |
| 4792730 |
Circuit for interrupting arc discharge in a gas-discharge vessel |
Dec. 20, 1988 |
| 4792729 |
Fluorescent lamp brightness control |
Dec. 20, 1988 |
| 4791338 |
Fluorescent lamp circuit with regulation responsive to voltage, current, and phase of load |
Dec. 13, 1988 |
| 4789810 |
Photocell temperature switch for high intensity discharge lamp fixture |
Dec. 6, 1988 |
| 4749916 |
Illuminator for cultivating plant |
Jun. 7, 1988 |
| 4749914 |
Circuit system for igniting and operating a high-pressure discharge lamp, particularly a sodium vapor lamp |
Jun. 7, 1988 |
| 4748381 |
Circuit arrangement for A.C. operation of gas discharge lamps |
May. 31, 1988 |
| 4742276 |
Regulated deuterium arc supply system |
May. 3, 1988 |
| 4739225 |
Reduced requirement energy storage for load having non-zero minimum operating potential |
Apr. 19, 1988 |
| 4733136 |
Method of regulating the power of vapor discharge lamps |
Mar. 22, 1988 |
| 4733137 |
Ion nitriding power supply |
Mar. 22, 1988 |
| 4701672 |
Strobe flash monitor |
Oct. 20, 1987 |
| 4645982 |
Load control unit in an image forming apparatus |
Feb. 24, 1987 |
| 4605301 |
Exposure method of semiconductor wafer by mercury-vapor lamp |
Aug. 12, 1986 |
| 4604552 |
Retrofit fluorescent lamp energy management/dimming system |
Aug. 5, 1986 |
| 4523131 |
Dimmable electronic gas discharge lamp ballast |
Jun. 11, 1985 |
| 4523130 |
Four lamp modular lighting control |
Jun. 11, 1985 |
| 4523129 |
Modular lighting control with circulating inductor |
Jun. 11, 1985 |
| 4523128 |
Remote control of dimmable electronic gas discharge lamp ballasts |
Jun. 11, 1985 |
| 4511195 |
Device for starting and operating gas discharge tubes |
Apr. 16, 1985 |
| 4503364 |
Programming and control device for modified lead ballast for HID lamps |
Mar. 5, 1985 |
| 4501994 |
Ballast modifying device and lead-type ballast for programming and controlling the operating performance of an hid sodium lamp |
Feb. 26, 1985 |
| 4500814 |
Lighting circuit control apparatus |
Feb. 19, 1985 |
| 4492899 |
Solid state regulated power supply system for cold cathode luminous tube |
Jan. 8, 1985 |
| 4477748 |
Solid state ballast |
Oct. 16, 1984 |
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