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Class Information
Number: 315/310
Name: Electric lamp and discharge devices: systems > Current and/or voltage regulation > Automatic regulation > Shunted impedance-type regulator
Description: Systems wherein the system includes a current limiting impedance and means to open and close a low impedance shunt circuit about the current limiting impedance, the shunt circuit controlling means being operated automatically in response to some condition.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7495398 |
Discharge lamp lighting apparatus |
Feb. 24, 2009 |
| 7462995 |
Transistorized, voltage-controlled dimming circuit |
Dec. 9, 2008 |
| 7458490 |
Article carrier assembly with removable stowable cross-rails and latching mechanism therefor |
Dec. 2, 2008 |
| 7330000 |
Discharge lighting bulbs control system |
Feb. 12, 2008 |
| 6445144 |
Current surge limiting circuit |
Sep. 3, 2002 |
| 6310446 |
Method for adjusting at least one operating parameter of an operating unit for electric lamps |
Oct. 30, 2001 |
| 6225755 |
High power factor electronic ballast with simplified circuit topology |
May. 1, 2001 |
| 6181073 |
Piezoelectric illumination control for microscope |
Jan. 30, 2001 |
| 6034490 |
Lighting circuit for discharge lamp |
Mar. 7, 2000 |
| 5844379 |
Circuit arrangement for igniting a high pressure discharge lamp |
Dec. 1, 1998 |
| 5726535 |
LED retrolift lamp for exit signs |
Mar. 10, 1998 |
| 5642019 |
Safety protector for non-isolated ballasts |
Jun. 24, 1997 |
| 5565743 |
Lighting circuit for discharge lamp |
Oct. 15, 1996 |
| 5554859 |
Electron emission element with schottky junction |
Sep. 10, 1996 |
| 5517087 |
Fluorescent lamp ignition circuit |
May. 14, 1996 |
| 5514938 |
D.C. ciruit for starting high pressure discharge lamp |
May. 7, 1996 |
| 5449981 |
Electronic ballast and power controller |
Sep. 12, 1995 |
| 5324423 |
UV bulb intensity control for water treatment system |
Jun. 28, 1994 |
| 5140228 |
Apparatus for regulating the intensity of light emitted by a lamp |
Aug. 18, 1992 |
| 5030892 |
Means for preventing damage to electronic ballasts as a result of failure of gas discharge lamps |
Jul. 9, 1991 |
| 5027033 |
High-efficiency fluorescent lamp operating circuit |
Jun. 25, 1991 |
| 4985820 |
Driver circuit for switching on lamp with low cold resistance |
Jan. 15, 1991 |
| 4949020 |
Lighting control system |
Aug. 14, 1990 |
| 4904907 |
Ballast circuit for metal halide lamp |
Feb. 27, 1990 |
| 4855649 |
Single-wired switching circuit directed to limit surge into lamp |
Aug. 8, 1989 |
| 4739225 |
Reduced requirement energy storage for load having non-zero minimum operating potential |
Apr. 19, 1988 |
| 4736138 |
Apparatus for limiting surge currents in dc-illuminated incandescent lamp |
Apr. 5, 1988 |
| 4716511 |
Surge current-limiting circuit |
Dec. 29, 1987 |
| 4701675 |
Apparatus for limiting arc discharge current in incandescent lamp |
Oct. 20, 1987 |
| 4645982 |
Load control unit in an image forming apparatus |
Feb. 24, 1987 |
| 4644229 |
Power supply for lighting incandescent lamp wth high-brightness |
Feb. 17, 1987 |
| 4603281 |
Electronic fluorescent lamp starter |
Jul. 29, 1986 |
| 4593233 |
Lamp drive circuit |
Jun. 3, 1986 |
| 4572992 |
Device for regulating ac current circuit |
Feb. 25, 1986 |
| 4531086 |
Device for stabilizing the voltage of a single- or multi-phase a-c network |
Jul. 23, 1985 |
| 4520295 |
Step-wise dimmer control circuit for a discharge lamp |
May. 28, 1985 |
| 4503365 |
Power supply system for low cold resistance loads |
Mar. 5, 1985 |
| 4488092 |
Illumination mode selecting device for illumination lamp |
Dec. 11, 1984 |
| 4451767 |
Temperature sensitive ballast circuit for a fluorescent lamp |
May. 29, 1984 |
| 4237405 |
Method and apparatus for conserving energy |
Dec. 2, 1980 |
| 4230970 |
Method and apparatus for saving energy |
Oct. 28, 1980 |
| 4134044 |
High frequency circuit for operating a high-intensity gaseous discharge lamp |
Jan. 9, 1979 |
| 4104562 |
Traffic light dimmer system |
Aug. 1, 1978 |
| RE29245 |
Voltage regulator for alternating current lighting system |
May. 31, 1977 |
| 4024430 |
Modulator and clamper for variable impedance load |
May. 17, 1977 |
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