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Class Information
Number: 315/283
Name: Electric lamp and discharge devices: systems > Pulsating or a.c. supply > Inductance in the supply circuit
Description: Systems provided with an inductance connected either in electrical series relation or electrical shunt relation to the load device and the source of current supply for the load device.

Sub-classes under this class:

Class Number Class Name Patents
315/284 Variable inductance 52

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8593072 Circuit assembly and method for operating a high pressure discharge lamp Nov. 26, 2013
8525430 Helical structure and method for plasma lamp Sep. 3, 2013
8441200 Electronic ballast and method for operating at least one first and second discharge lamp May. 14, 2013
8436543 Plasma supply device May. 7, 2013
8339063 Circuits and methods for driving light sources Dec. 25, 2012
8319451 Two light level control circuit Nov. 27, 2012
8278843 Method for operating a switching-mode power supply Oct. 2, 2012
8232734 Electronic ballast having a partially self-oscillating inverter circuit Jul. 31, 2012
8164271 Uni-directional light emitting diode drive circuit in bi-directional power series resonance Apr. 24, 2012
8159142 Ballast being capable of saving the use of internal connection terminals Apr. 17, 2012
8115409 Driving circuit and method of backlight module Feb. 14, 2012
8084952 Method and system to detect zero current conditions in an electronic ballast by monitoring voltage across a buck inductor Dec. 27, 2011
8049430 Electronic ballast having a partially self-oscillating inverter circuit Nov. 1, 2011
8049432 Measurement circuit for an electronic ballast Nov. 1, 2011
7938548 Projection device May. 10, 2011
7919926 Aggregate ignition method in high frequency metal halide lamps Apr. 5, 2011
7755299 Transformer for balancing currents Jul. 13, 2010
7598685 Off line LED driver with integrated synthesized digital optical feedback Oct. 6, 2009
7443109 LED current pulse limiter arrangement Oct. 28, 2008
7385357 Inductively coupled ballast circuit Jun. 10, 2008
7382101 Lighting system Jun. 3, 2008
7355351 Circuit arrangement having a converter without a transformer but with an inductor for the pulsed operation of dielectric barrier discharge lamps Apr. 8, 2008
7352136 DC-DC converter with reduced surge voltage and an electronic ballast including the converter for a discharge lamp Apr. 1, 2008
7180248 Inductively coupled ballast circuit Feb. 20, 2007
7129647 Electronic ballast with programmable processor Oct. 31, 2006
7075275 DC-DC converter Jul. 11, 2006
6969957 Ignition system for a high-frequency high-intensity discharge lamp system Nov. 29, 2005
6917163 Inductively powered lamp assembly Jul. 12, 2005
6876157 Lamp inverter with pre-regulator Apr. 5, 2005
6825620 Inductively coupled ballast circuit Nov. 30, 2004
6788010 Operating appliance and an operating method for high-pressure lamps Sep. 7, 2004
6768271 Ballast and method for operating a lamp Jul. 27, 2004
6753659 Operating device for discharge lamps having a preheating device Jun. 22, 2004
6734637 Hot-restrike ignition system for a high-frequency high-intensity discharge lamp assembly May. 11, 2004
6731071 Inductively powered lamp assembly May. 4, 2004
6713965 Microwave oven Mar. 30, 2004
6700332 Electrodeless discharge lamp system Mar. 2, 2004
6677716 Operating device for gas discharge lamp Jan. 13, 2004
6653800 Ballast circuit with lamp cathode protection and ballast protection Nov. 25, 2003
6583586 Brightness- regulating voltage-transforming circuit for high-pressure discharge lamp Jun. 24, 2003
6577075 High intensity discharge lamp magnetic/electronic ballast Jun. 10, 2003
6545429 Lighting assembly having regulating transformer distally located from ballast Apr. 8, 2003
6545428 Light fixture with submersible enclosure for an electric lamp Apr. 8, 2003
6531833 Single ballast for powering at least one high intensity discharge lamp Mar. 11, 2003
6504322 Discharge lamp operating apparatus Jan. 7, 2003
6433493 Electronic power converter for triac based controller circuits Aug. 13, 2002
6414447 Discharge lamp lighting device and illuminating device Jul. 2, 2002
6407507 Personal electronic device having EL lamp and buzzer powered from a single inductor Jun. 18, 2002
6396220 Lamp ignition with compensation for parasitic loading capacitance May. 28, 2002
6377000 Electronic ballast for gas discharge lamp Apr. 23, 2002

1 2 3 4

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