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Class Information
Number: 315/311
Name: Electric lamp and discharge devices: systems > Current and/or voltage regulation > Automatic regulation > Variable impedance-type regulator
Description: Systems wherein the regulating means is a device designed to have its impedance varied automatically in response to some condition.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7619362 |
Outer jacket leak detection method and ballast implementing the method |
Nov. 17, 2009 |
| 7495398 |
Discharge lamp lighting apparatus |
Feb. 24, 2009 |
| 7474059 |
Fluorescent ballast with fiber optic and IR control |
Jan. 6, 2009 |
| 7265681 |
Light emitted diode driving apparatus |
Sep. 4, 2007 |
| 7245091 |
Inverter capable of switching working frequency |
Jul. 17, 2007 |
| 7148628 |
Photosensitive control with dynamic calibration |
Dec. 12, 2006 |
| 6873122 |
Apparatus for operating discharge lamps |
Mar. 29, 2005 |
| 6784623 |
Variable switch with reduced noise interface |
Aug. 31, 2004 |
| 6703796 |
Power supply and inverter used therefor |
Mar. 9, 2004 |
| 6501236 |
Variable switch with reduced noise interference |
Dec. 31, 2002 |
| 6420839 |
Power supply system for multiple loads and driving system for multiple lamps |
Jul. 16, 2002 |
| 6400102 |
Non-linear light-emitting load current control |
Jun. 4, 2002 |
| 6310446 |
Method for adjusting at least one operating parameter of an operating unit for electric lamps |
Oct. 30, 2001 |
| 6285139 |
Non-linear light-emitting load current control |
Sep. 4, 2001 |
| 6211625 |
Electronic ballast with over-voltage protection |
Apr. 3, 2001 |
| 5896010 |
System for controlling lighting in an illuminating indicating device |
Apr. 20, 1999 |
| 5726537 |
Circuit for pulsed operation of a discharge lamp |
Mar. 10, 1998 |
| 5714847 |
Power regulator |
Feb. 3, 1998 |
| 5686799 |
Ballast circuit for compact fluorescent lamp |
Nov. 11, 1997 |
| 5621281 |
Discharge lamp lighting device |
Apr. 15, 1997 |
| 5554859 |
Electron emission element with schottky junction |
Sep. 10, 1996 |
| 5528111 |
Ballast circuit for powering gas discharge lamp |
Jun. 18, 1996 |
| 5500575 |
Switchmode AC power controller |
Mar. 19, 1996 |
| 5493182 |
Fluorescent lamp operating circuit, permitting dimming of the lamp |
Feb. 20, 1996 |
| 5453667 |
Inverter having frequency changing function |
Sep. 26, 1995 |
| 5327048 |
Bi-level lighting control system for hid lamps |
Jul. 5, 1994 |
| 5298837 |
Ultraviolet flash dryer |
Mar. 29, 1994 |
| 5289083 |
Resonant inverter circuitry for effecting fundamental or harmonic resonance mode starting of a gas discharge lamp |
Feb. 22, 1994 |
| 5162700 |
Controllable ballast and operating system utilizing same |
Nov. 10, 1992 |
| 5118997 |
Dual feedback control for a high-efficiency class-d power amplifier circuit |
Jun. 2, 1992 |
| 5063332 |
Feedback control system for a high-efficiency class-D power amplifier circuit |
Nov. 5, 1991 |
| 5046152 |
Ignition circuit for a gas discharge lamp |
Sep. 3, 1991 |
| 5039919 |
Control arrangement for electronic ballast |
Aug. 13, 1991 |
| 5019749 |
Back-light device for a video display apparatus |
May. 28, 1991 |
| 5015921 |
Soft start solid state switch |
May. 14, 1991 |
| 4982139 |
Method and apparatus for controlling light intensity |
Jan. 1, 1991 |
| 4949020 |
Lighting control system |
Aug. 14, 1990 |
| 4939427 |
Ground-fault-protected series-resonant ballast |
Jul. 3, 1990 |
| 4902958 |
Incandescent light regulation and intensity controller |
Feb. 20, 1990 |
| 4855647 |
Flashlight with soft turn on control |
Aug. 8, 1989 |
| 4855649 |
Single-wired switching circuit directed to limit surge into lamp |
Aug. 8, 1989 |
| 4758767 |
Self-contained analog photodiode light sensing head |
Jul. 19, 1988 |
| 4739225 |
Reduced requirement energy storage for load having non-zero minimum operating potential |
Apr. 19, 1988 |
| 4644229 |
Power supply for lighting incandescent lamp wth high-brightness |
Feb. 17, 1987 |
| 4634936 |
Intrinsically safe miner's lamp |
Jan. 6, 1987 |
| 4618803 |
Current limited strobe charge circuit |
Oct. 21, 1986 |
| 4617496 |
Warm-up circuit with timed shut-off of the warm-up current |
Oct. 14, 1986 |
| 4590407 |
Scale illumination lamp control circuit for an oscilloscope |
May. 20, 1986 |
| 4587591 |
Power supply for ozone generator |
May. 6, 1986 |
| 4574223 |
Fast warmup ballast for HID lamps |
Mar. 4, 1986 |
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