| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
|---|
| 06/02/1981 | CA1102402A1 Discharge lamp |
| 05/26/1981 | US4270079 Flash device |
| 05/26/1981 | US4270071 Composite base and ballast member for compact single-ended fluorescent lamp |
| 05/26/1981 | CA1101922A1 Strobe lamp series triggering circuit |
| 05/20/1981 | EP0028986A1 Feeding device for a discharge lamp with preheating circuit |
| 05/19/1981 | US4268780 Integrated fluorescent-incandescent lamp assembly |
| 05/19/1981 | CA1101487A1 Trigger circuit for flash lamp directly coupled to ac source |
| 05/19/1981 | CA1101486A1 Multiflash operating circuit directly coupled to ac source |
| 05/05/1981 | US4266165 High intensity discharge lamp starting circuit |
| 05/05/1981 | US4266163 Incident metering electronic flash control |
| 05/05/1981 | US4266162 Electromagnetic discharge apparatus with double-ended power coupling |
| 04/29/1981 | EP0027764A1 Method and device for enhancing ionization in gas discharge tubes, and lighting installation relating thereto |
| 04/29/1981 | EP0027605A1 Light source device for an endoscope |
| 04/15/1981 | EP0027039A2 Power supply systems for hazardous locations |
| 04/14/1981 | US4262234 SCR Lamp supply trigger circuit |
| 04/08/1981 | EP0026531A1 Starter for lamps such as discharge lamps |
| 04/07/1981 | USRE30571 Radiation-sensitive control circuit for driving lamp at various power levels |
| 04/07/1981 | US4260934 Electric device provided with a switch which is designed as a discharge tube |
| 04/07/1981 | US4260932 Method and circuit for facilitating the starting and steady state flickerless operation of a discharge lamp |
| 03/31/1981 | US4259616 Multiple gaseous lamp electronic ballast circuit |
| 03/31/1981 | US4259615 Photographic flash device |
| 03/31/1981 | US4259614 Electronic ballast-inverter for multiple fluorescent lamps |
| 03/24/1981 | US4258338 Pulse generator producing short duration high current pulses for application to a low impedance load |
| 03/24/1981 | US4258297 Voltage indicator for a stroboscope |
| 03/24/1981 | US4258295 Timed ballast circuit for sodium vapor lamp |
| 03/24/1981 | US4258294 Control circuit for flash tube apparatus |
| 03/24/1981 | US4258293 High intensity discharge lighting system |
| 03/24/1981 | US4258290 Operation indicator for auto-strobo unit |
| 03/24/1981 | US4258289 Metal halide lamp for operation with a mercury ballast |
| 03/24/1981 | US4258288 Resistor-aided starting of metal halide lamps |
| 03/17/1981 | US4256995 Electronic pre-emission flash device |
| 03/17/1981 | US4256994 Actuating circuit for light measuring circuit in electronic flash device |
| 03/17/1981 | US4256993 Energy saving device for rapid-start fluorescent lamp system |
| 03/17/1981 | US4256992 Electric device for starting and feeding a metal vapor discharge lamp provided with a preheatable electrode |
| 03/17/1981 | US4256991 Electronic igniter for fluorescent lamps |
| 03/17/1981 | CA1097730A1 Ballast circuit for high intensity discharge (hid) lamps |
| 03/17/1981 | CA1097729A1 Direct drive ballast with starting circuit |
| 03/17/1981 | CA1097728A1 Direct drive ballast circuit |
| 03/17/1981 | CA1097727A1 Lamp ballast circuit |
| 03/11/1981 | EP0024522A2 Inverter for operating at least two gas discharge lamps |
| 03/10/1981 | US4255692 Non-light producing phosphor energizable lamp simulator and methods of using same and making same |
| 03/10/1981 | US4255691 Shockproof electronic flash device |
| 03/04/1981 | EP0024319A1 Process for making E-shaped core laminations and I-shaped yoke laminations for a choke or transformer, particularly for gas discharge lamps |
| 03/03/1981 | US4254364 Lamp regulator circuit for rotary camera |
| 03/03/1981 | CA1096931A1 Power supply for flash lamp |
| 02/24/1981 | US4253046 Variable intensity control apparatus for operating a gas discharge lamp |
| 02/24/1981 | US4253043 Electric arrangement including at least one gas and/or vapor discharge tube |
| 02/17/1981 | US4251753 Power supply circuit for strobo unit |
| 02/17/1981 | US4251752 Solid state electronic ballast system for fluorescent lamps |
| 02/17/1981 | CA1095974A1 Dual mode solid state inverter circuit for starting and ballasting gas discharge lamps |
| 02/17/1981 | CA1095973A1 Discharge lamp auxiliary circuit with di/dt switching control |
| 02/11/1981 | EP0023709A1 System for controlling the exposure time of a photoresist layer |
| 02/04/1981 | EP0023263A1 Transistor converter circuit |
| 02/03/1981 | US4249110 Controlled energy cut-off for an electronic flash device |
| 02/03/1981 | CA1095116A1 Color improvement of high pressure sodium vapor lamps by pulsed operation |
| 02/03/1981 | CA1095115A1 Electric multiple flash arrangement |
| 01/27/1981 | US4247803 Trigger pulse generator for gas discharge lamps |
| 01/27/1981 | US4247800 Radioactive starting aids for electrodeless light sources |
| 01/27/1981 | CA1094633A1 Electronic ballast for gaseous discharge lamps |
| 01/22/1981 | WO1981000184A1 Dimmer circuit for fluorescent lamps |
| 01/21/1981 | EP0022699A1 High efficiency mains power supply for gas discharge tubes |
| 01/20/1981 | US4246515 Energy-regulating firing circuit for an electronic strobe flash unit |
| 01/20/1981 | US4246514 Energy-saving electronic strobe flash apparatus having dual flashtubes |
| 01/20/1981 | US4246513 Flash lamp discharge using radiant energy |
| 01/13/1981 | US4245179 Planar electrodeless fluorescent light source |
| 01/13/1981 | US4245178 High-frequency electrodeless discharge device energized by compact RF oscillator operating in class E mode |
| 01/13/1981 | US4245177 Inverter for operating a gaseous discharge lamp |
| 01/07/1981 | EP0021508A1 Firing and operating circuit arrangement for gas and/or vapour discharge lamps |
| 01/07/1981 | EP0020493A1 Fluorescent lamp lighting system. |
| 01/07/1981 | EP0020390A1 Improvements in lamp drive circuits, and cine film projectors or cameras incorporating the same |
| 01/06/1981 | US4243917 Flash lamp drive circuit |
| 01/06/1981 | CA1093145A1 Method of operating gaseous discharge lamps |
| 01/06/1981 | CA1093144A1 Discharge lamp ballast with resonant starting |
| 01/06/1981 | CA1093143A1 Discharge lamp operating circuit |
| 12/30/1980 | US4242616 Photographic flash apparatus |
| 12/30/1980 | US4242615 Gas discharge tube driver and level shifter circuit |
| 12/30/1980 | US4242614 Lighting control system |
| 12/30/1980 | CA1092642A1 Multiflash system |
| 12/23/1980 | US4241369 Electrical power source for an electronic flash unit |
| 12/23/1980 | US4241294 Brightness control circuit for a vacuum fluorescent display |
| 12/23/1980 | US4241280 Light integrator circuit with built-in anticipation |
| 12/23/1980 | US4241279 Control circuit for an automatic electronic flash light device |
| 12/16/1980 | US4240009 Electronic ballast |
| 12/16/1980 | US4240008 Automatic electronic flash light device |
| 12/16/1980 | CA1091760A1 Combination discharge-incandescent lamp with thermal switch control |
| 12/11/1980 | WO1980002778A1 A dc to dc converter adjustable dynamically to battery condition |
| 12/09/1980 | US4238711 Circuit for selective individual operation of multiple arc discharge lamps |
| 12/09/1980 | US4238710 Symmetry regulated high frequency ballast |
| 12/09/1980 | US4238708 Discharge lamp operating system |
| 12/09/1980 | CA1091290A1 Discharge lamp operating circuit |
| 12/09/1980 | CA1091289A1 Discharge lamp operating circuit |
| 12/09/1980 | CA1091288A1 High pressure metal halide lamp with electron collector |
| 12/02/1980 | US4237403 Power supply for fluorescent lamp |
| 11/25/1980 | US4236100 Lighting circuits |
| 11/25/1980 | CA1090409A1 Piezo-electrically actuated electronic flash l.c. ignition circuit |
| 11/18/1980 | US4234823 Ballast circuit for low pressure gas discharge lamp |
| 11/18/1980 | US4234822 Control circuit providing constant power source |
| 11/18/1980 | US4234820 Light regulation system |
| 11/18/1980 | CA1089923A1 Energy-conserving illumination system |
| 11/11/1980 | US4233541 Start winding for solenoidal electric field discharge lamps |