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Class Information
Number: 315/94
Name: Electric lamp and discharge devices: systems > With cathode or cathode heater supply circuit
Description: Systems having a load device connected in the system, the load device being a discharge device provided with (1) a thermionic cathode adapted to be heated by electric current other than the discharge current flowing through the cathode, or (2) a cathode of the indirectly heated type, that is, a thermionic cathode which is heated by the heat generated in an electric heater element adjacent the cathode, the system being provided with electric circuit means to apply electric current to the cathode or the cathode heater element.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 8692166 |
Substrate heating device and substrate heating method |
Apr. 8, 2014 |
| 8664860 |
Cathode heating device of magnetron, microwave generating device and method of preheating cathode of magnetron |
Mar. 4, 2014 |
| 8593078 |
Universal dimming ballast platform |
Nov. 26, 2013 |
| 8492978 |
Dual element switched electron gun |
Jul. 23, 2013 |
| 8476561 |
Substrate heating device and substrate heating method |
Jul. 2, 2013 |
| 8441211 |
Electronic ballast capable of self-protection at natural or premature end of life of fluorescent light tube |
May. 14, 2013 |
| 8378579 |
Ballast circuit for a gas discharge lamp with a control loop to reduce filament heating voltage below a maximum heating level |
Feb. 19, 2013 |
| 8358072 |
Circuit arrangement, and method for the operation of a fluorescent lamp |
Jan. 22, 2013 |
| 8338808 |
Ultraviolet radiation lamp and source module and treatment system containing same |
Dec. 25, 2012 |
| 8324813 |
Electronic ballast with frequency independent filament voltage control |
Dec. 4, 2012 |
| 8319434 |
OLED illumination device with integrated proximity sensor |
Nov. 27, 2012 |
| 8314557 |
Light source device, discharge lamp and its control method |
Nov. 20, 2012 |
| 8232727 |
Ballast circuit for a gas-discharge lamp having a filament drive circuit with monostable control |
Jul. 31, 2012 |
| 8228000 |
Circuit arrangement for operating a low-pressure gas discharge lamp and corresponding method |
Jul. 24, 2012 |
| 8212489 |
Circuit arrangement and method for starting and operating one or more discharge lamps |
Jul. 3, 2012 |
| 8203273 |
Ballast circuit for a gas discharge lamp that reduces a pre-heat voltage to the lamp filaments during lamp ignition |
Jun. 19, 2012 |
| 8188451 |
Electron generation and delivery system for contamination sensitive emitters |
May. 29, 2012 |
| 8138676 |
Methods and systems for dimmable fluorescent lighting using multiple frequencies |
Mar. 20, 2012 |
| 8129911 |
Magnetron |
Mar. 6, 2012 |
| 8004199 |
Method for powering a control circuit for a gas discharge lamp during pre-heating of said lamp, and a device for performing said method |
Aug. 23, 2011 |
| 7952303 |
Electronic ballast for a gas discharge lamp with controlled filament heating during dimming |
May. 31, 2011 |
| 7834552 |
Controlling a lamp ballast |
Nov. 16, 2010 |
| 7808183 |
Arrangement for the regulation of the electron beam power of an electron gun |
Oct. 5, 2010 |
| 7750570 |
Glow-switch starter, lighting device and lighting system therewith, and use thereof |
Jul. 6, 2010 |
| 7635953 |
Insulation detection power supply and electronic ballast |
Dec. 22, 2009 |
| 7629750 |
Lamp driving device and driving method thereof |
Dec. 8, 2009 |
| 7589472 |
Electronic ballast with lamp type determination |
Sep. 15, 2009 |
| 7573046 |
Thermal field emission electron gun with reduced arcing |
Aug. 11, 2009 |
| 7560867 |
Starter for a gas discharge light source |
Jul. 14, 2009 |
| 7560868 |
Ballast with filament heating and ignition control |
Jul. 14, 2009 |
| 7429826 |
Indirectly heated electrode for gas discharge tube, gas discharge tube using said indirectly heated electrode, and lighting device for said gas discharge tube |
Sep. 30, 2008 |
| 7391041 |
Germicidal UV reactor and UV lamp |
Jun. 24, 2008 |
| 7339322 |
Apparatus and methods for making spectroscopic measurements of cathode fall in fluorescent lamps |
Mar. 4, 2008 |
| 7279844 |
Electronic ballast |
Oct. 9, 2007 |
| 7259519 |
Apparatus and methods for making capacitive measurements of cathode fall in fluorescent lamps |
Aug. 21, 2007 |
| 7256549 |
Three electrode arc-discharge lamp |
Aug. 14, 2007 |
| 7224124 |
Apparatus and methods for making capacitive measurements of cathode fall in fluorescent lamps |
May. 29, 2007 |
| 7196476 |
Apparatus and methods for making capacitive measurements of cathode fall in fluorescent lamps |
Mar. 27, 2007 |
| 7193367 |
Indirectly heated electrode for gas discharge tube, gas discharge tube with this, and its operating device |
Mar. 20, 2007 |
| 7187132 |
Ballast with filament heating control circuit |
Mar. 6, 2007 |
| 7063431 |
Resistive bubble lamp structure |
Jun. 20, 2006 |
| 7061173 |
Amalgam-doped low mercury low-pressure UV irradiator |
Jun. 13, 2006 |
| 7002301 |
Apparatus and methods for making capacitive measurements of cathode fall in fluorescent lamps |
Feb. 21, 2006 |
| 6969952 |
System and method for automatically routing power for an integrated circuit |
Nov. 29, 2005 |
| 6894439 |
Portable power converter pack |
May. 17, 2005 |
| 6806649 |
Starter assembly for a gas discharge lamp |
Oct. 19, 2004 |
| 6788001 |
Lighting system with caring preheating of gas discharge lamps |
Sep. 7, 2004 |
| 6736927 |
Apparatus for increased workpiece throughput |
May. 18, 2004 |
| 6731073 |
Safety starter for fluorescent lamps |
May. 4, 2004 |
| 6696791 |
Method for starting a discharge lamp |
Feb. 24, 2004 |
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