Patents
Sitemap › H05 - Electric techniques not otherwise provided for › H05B - Electric heating; Electric lighting not otherwise provided for › H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps
Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100)
12/1981
12/22/1981CA1114890A1 Starter for igniting a gas and/or vapour discharge lamp
12/22/1981CA1114889A1 Electronic starter for igniting a discharge lamp
12/22/1981CA1114888A1 Lamp unit
12/22/1981CA1114887A1 Adjustable dc pulse circuit for variation over a predetermined range using two timer networks
12/22/1981CA1114886A1 Non-interfering, overlapping high frequency signalling for lamp dimmer circuit
12/16/1981EP0041722A1 Photoflash array with selective pairing of lamps and switching of common circuit
12/16/1981EP0041589A1 Electronic fluorescent lamp ballast
12/15/1981US4306281 DC-DC Converter for electronic flash unit
12/15/1981US4306177 Discharge lamp lighting device with a delayed-output oscillation circuit
12/15/1981US4306176 Operation indicator for automatic flash device
12/10/1981WO1981003596A1 A feedback control system for applying ac power to ballasted lamps
12/09/1981EP0041499A1 System for instant ignition and long-life operation of discharge lamps
12/02/1981EP0041027A1 Supply circuit for discharge lamps comprising voltage multipliers
12/01/1981US4303849 Process and apparatus for charging a capacitor and application of the process
11/1981
11/25/1981EP0040547A1 Illumination system including a low pressure arc discharge lamp
11/25/1981EP0040449A1 Glow-discharge starter and discharge lamp comprising such a starter
11/24/1981US4302707 Electric flash discharge device
11/17/1981US4301392 Electronic flash system capable of automatic flash duration control
11/17/1981CA1112713A1 Arc discharge lamp including starting circuit
11/17/1981CA1112712A1 Lighting circuits
11/10/1981US4300075 AC Regulator system for quartz iodine lamps
11/10/1981CA1112296A1 Instant light lamp control circuit
11/10/1981CA1112295A1 Programmable lighting control system
11/10/1981CA1112294A1 Optocoupler dimmer circuit for high intensity, gaseous discharge lamp
11/10/1981CA1112293A1 Electronic device for controlling the brightness of an electric gas-discharge lamp without an incandescent cathode
11/03/1981US4298827 Power source circuit for a flash discharge lamp
11/03/1981US4298826 Automatic flash unit
10/1981
10/29/1981WO1981003103A1 Supply apparatus
10/29/1981WO1981003102A1 Ballast for connecting a discharge lamp
10/27/1981US4297617 Light producing device
10/27/1981US4297616 Fluorescent lamp with incandescent ballasting systems
10/21/1981EP0038035A1 Light source comprising a high pressure discharge lamp
10/15/1981WO1981002965A1 Control device for a converter-current valve for operating a gas discharge tube from a d.c.source
10/06/1981US4293799 Power supply systems
10/06/1981US4293798 Inductive-capacitive cyclic charge-discharge ignition system
10/06/1981CA1110319A1 Every half cycle ignited discharge lamp operating circuit
10/06/1981CA1110317A1 Two level inverter circuit
10/06/1981CA1110316A1 Multiple flashlamp operating circuit
10/06/1981CA1110315A1 Operating circuit for flash lamp directly coupled to ac source
09/1981
09/30/1981EP0036647A1 Electronic flash apparatus
09/29/1981US4292570 Energy-conserving illumination system
09/23/1981EP0036196A2 A light supply device for an endoscope
09/22/1981US4291254 Discharge lamp energization circuit, particularly for audio and supersonic frequency operation of high-pressure discharge lamps
09/22/1981US4290692 Photographic strobe apparatus
09/22/1981CA1109516A1 Direct current ballasting and starting circuitry for gaseous discharge lamps
09/17/1981WO1981002642A1 Electric power control device
09/15/1981US4289993 Direct current power source for an electric discharge lamp
09/09/1981EP0035261A1 Automatic photoflash device
09/09/1981EP0035224A1 Electronic flash apparatus
09/08/1981US4288725 Lightweight fluorescent lamp ballast
09/08/1981US4288724 Impulse generator for use with phosphor energizable lamps
09/08/1981US4288722 Electronic flash device
09/01/1981US4287456 Portable fluorescent tube assembly having low voltage convenience outlet
09/01/1981US4287455 Power saving circuit for gaseous discharge lamps
09/01/1981US4287453 Electronic slave flash delay device
09/01/1981CA1108225A1 High frequency dimmer circuit for high intensity, gaseous discharge lamp
08/1981
08/26/1981EP0034401A2 Discharge lamp circuit
08/25/1981US4286196 Automatic dimmer cutout for arc lamp of fiber optic light source
08/25/1981US4286195 Dimmer circuit for fluorescent lamps
08/25/1981US4286194 Generator for use with loads having changing impedance characteristics
08/25/1981US4286193 Starting and operating circuit for gas discharge lamp
08/25/1981US4285589 Switch control for camera flash unit
08/25/1981US4285586 Camera controller for flashgun operation
08/25/1981CA1107526A1 Photoflash lamp array having high voltage shorting type flash lamps and radiation sensitive switching elements
08/19/1981EP0033890A1 Power source apparatus for an electric flash lamp
08/18/1981US4284925 Multiple level dimming circuit for fluorescent lamp
08/11/1981US4283661 Irradiation device and removable timer useful therewith
08/11/1981US4283658 Projection lamp control arrangement
08/11/1981US4283657 Exit illuminating system
08/11/1981CA1106908A1 Two-wire ballast for fluorescent tube dimming
08/05/1981EP0033002A2 Power saving circuit for gaseous discharge lamps
07/1981
07/29/1981EP0032546A1 Instant-on light source
07/28/1981CA1105985A1 Flash capacitor charging circuit
07/21/1981USRE30687 Energy saving device for a standard fluorescent lamp system
07/15/1981EP0032089A2 Circuit for supplying an electrical load, especially for discharge lamp
07/15/1981EP0031933A2 Low voltage fluorescent lamp operating circuit
07/14/1981US4278918 Display panel driver circuit
07/14/1981US4278916 Instant-on light source
07/08/1981EP0031372A1 Dimmer circuit for fluorescent lamps
07/07/1981US4277728 Power supply for a high intensity discharge or fluorescent lamp
07/07/1981US4277726 Solid-state ballast for rapid-start type fluorescent lamps
07/07/1981US4277725 Gas and/or vapor discharge lamp
06/1981
06/30/1981US4276497 Laser flashtube power supply
06/30/1981US4276496 Gas discharge lamp employing a pulse generator with a double stage amplification circuit
06/24/1981EP0030785A1 Electric discharge lamp adapter circuits
06/23/1981US4275337 Starting and operating circuit for gaseous discharge lamps
06/23/1981US4275335 Constant light intensity electronic flash device
06/23/1981US4274724 Indicator circuit for auto-strobo unit
06/23/1981US4274723 Auto electronic flash unit
06/23/1981CA1103749A1 Lamp ballast circuit
06/23/1981CA1103748A1 High power factor conversion circuitry
06/23/1981CA1103747A1 Tuned oscillator ballast circuit
06/16/1981US4274033 High-frequency lamp operating circuit
06/16/1981US4273959 Larynx stroboscope device
06/09/1981US4272806 DC to DC Converter adjustable dynamically to battery condition
06/09/1981US4272704 DC Power supply for high power discharge devices
06/09/1981US4272188 Exposure compensation circuit for a copier
06/09/1981US4272170 Photographic arrangement using various electronic flash devices
06/02/1981US4271375 Flash light discharge device
06/02/1981CA1102403A1 Gas and/or vapour discharge lamp
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