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Class Information
Number: 315/293
Name: Electric lamp and discharge devices: systems > Current and/or voltage regulation > Pre-selectable regulator systems
Description: Systems, wherein (1) the supply circuit of the load device includes at least two impedances, means being provided for selectively connecting either of the two impedances in the supply circuit of the load device, or (2) the regulator in the supply circuit of the load device is designed to have its impedance varied over a range of values, means being provided to preselect the value of the impedance to be connected in the circuit and means being provided to effect a transition from one of the impedance values and to stop such transition at the preselected impedance value.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7592758 |
Stabilizer with brightness control for high intensity discharge lamp |
Sep. 22, 2009 |
| 7495398 |
Discharge lamp lighting apparatus |
Feb. 24, 2009 |
| 7436123 |
Discharge lamp ballast device and lighting appliance |
Oct. 14, 2008 |
| 7405715 |
LED light apparatus with instantly adjustable color intensity |
Jul. 29, 2008 |
| 7382100 |
Lighting control device having improved long fade off |
Jun. 3, 2008 |
| 7359545 |
Method and system to compensate for lamp intensity differences in a photolithographic inspection tool |
Apr. 15, 2008 |
| 7245086 |
Lamp operating circuit and operating method for a lamp having active current measurement |
Jul. 17, 2007 |
| 7170238 |
Control systems and methods |
Jan. 30, 2007 |
| 7166970 |
Lighting control device having improved long fade off |
Jan. 23, 2007 |
| 7071634 |
Lighting control device having improved long fade off |
Jul. 4, 2006 |
| 6963178 |
Apparatus for controlling operation of gas discharge devices |
Nov. 8, 2005 |
| 6933686 |
Programmable AC power switch |
Aug. 23, 2005 |
| 6819059 |
Flash strobe power supply system and method |
Nov. 16, 2004 |
| 6774582 |
Light dimming control method and apparatus |
Aug. 10, 2004 |
| 6531836 |
Automatic light switch |
Mar. 11, 2003 |
| 6531830 |
Discharge-lamp drive apparatus |
Mar. 11, 2003 |
| 6369524 |
Addressable light dimmer and addressing system |
Apr. 9, 2002 |
| 6320331 |
Light source apparatus using electric lamp as light source |
Nov. 20, 2001 |
| 6242872 |
Programmable gradual illumination lighting device |
Jun. 5, 2001 |
| 6188181 |
Lighting control system for different load types |
Feb. 13, 2001 |
| 5994791 |
Portable controlled lighting system |
Nov. 30, 1999 |
| 5811940 |
Phase-shift lamp control |
Sep. 22, 1998 |
| 5804927 |
Light emitting apparatus for a bicycle |
Sep. 8, 1998 |
| 5757145 |
Dimming control system and method for a fluorescent lamp |
May. 26, 1998 |
| 5691605 |
Electronic ballast with interface circuitry for multiple dimming inputs |
Nov. 25, 1997 |
| 5629587 |
Programmable lighting control system for controlling illumination duration and intensity levels of lamps in multiple lighting strings |
May. 13, 1997 |
| 5612597 |
Oscillating driver circuit with power factor correction, electronic lamp ballast employing same and driver method |
Mar. 18, 1997 |
| 5610480 |
Control apparatus for copying machine or the like |
Mar. 11, 1997 |
| 5585699 |
Control circuit for fluorescent lamps |
Dec. 17, 1996 |
| 5530322 |
Multi-zone lighting control system |
Jun. 25, 1996 |
| 5519263 |
Three-way toggle dimmer switch |
May. 21, 1996 |
| 5465031 |
Programmable actuator for light dimmer |
Nov. 7, 1995 |
| 5406176 |
Computer controlled stage lighting system |
Apr. 11, 1995 |
| 5399940 |
Lighting indicating device having plural illuminating elements with all such elements being illuminated with one being greater than the others |
Mar. 21, 1995 |
| 5371444 |
Electronic ballast power supply for gas discharge lamp including booster start circuit responsive to power up condition |
Dec. 6, 1994 |
| 5254909 |
Automatic luminosity cyclical modulation device for a lighting facility |
Oct. 19, 1993 |
| 5248919 |
Lighting control device |
Sep. 28, 1993 |
| 5221877 |
Power reduction control for inductive lighting installation |
Jun. 22, 1993 |
| 5189344 |
Solid state strobe tube control circuit with programmable flash pattern |
Feb. 23, 1993 |
| 5177409 |
Controllable electronic ballast |
Jan. 5, 1993 |
| 5072216 |
Remote controlled track lighting system |
Dec. 10, 1991 |
| 5041767 |
Digital controller for gas discharge tube |
Aug. 20, 1991 |
| 5001398 |
Lamp intensity control system having over-current protection |
Mar. 19, 1991 |
| 4933607 |
Exposure device for reprographics and method |
Jun. 12, 1990 |
| 4924151 |
Multi-zone, multi-scene lighting control system |
May. 8, 1990 |
| 4885508 |
System for controlling the intensity of high power lights |
Dec. 5, 1989 |
| 4733136 |
Method of regulating the power of vapor discharge lamps |
Mar. 22, 1988 |
| 4733138 |
Programmable multicircuit wall-mounted controller |
Mar. 22, 1988 |
| 4727296 |
Lighting scene control panel and control circuit |
Feb. 23, 1988 |
| 4704563 |
Fluorescent lamp operating circuit |
Nov. 3, 1987 |
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