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)
11/1980
11/11/1980CA1089526A1 Photographic flash device
11/04/1980US4232252 Lighting network including a gas discharge lamp and standby lamp
11/04/1980CA1089011A1 Discharge lamp ballast circuit
11/04/1980CA1088999A1 Fluorescent lamp unit for multiple installation
10/1980
10/29/1980EP0018308A1 Electronic flash device with automatic control of the quantity of light, and method of operation
10/29/1980EP0017849A1 Electronic flash apparatus
10/29/1980EP0017791A2 Adapter for gas discharge tubes fed from AC mains
10/28/1980US4230971 Variable intensity control apparatus for operating a gas discharge lamp
10/21/1980US4229681 Frequency/sensitive switching circuit
10/15/1980EP0017615A1 Circuit for varying the light intensity of fluorescent lamps and its use
10/15/1980EP0016756A4 Circuit for energising a gas discharge lamp.
10/15/1980EP0016756A1 Circuit for energising a gas discharge lamp.
10/14/1980US4228382 Power regulating inverter circuit
10/14/1980US4228381 Flash tube apparatus with delayed emission
10/07/1980US4227118 Circuits for operating electric discharge lamps
10/07/1980CA1087242A1 Fixed frequency, variable duty cycle, square wave dimmer for high intensity gaseous discharge lamp
10/01/1980EP0016687A2 Variable gain amplifier and device comprising it for the animation of illuminated signs
10/01/1980EP0016542A2 Electrodeless discharge lamp - radio frequency oscillator circuit combinations
09/1980
09/30/1980CA1086815A1 High frequency transistor ballast
09/30/1980CA1086814A1 Electric discharge lamp with voltage multiplier circuit
09/23/1980US4224563 Regulator circuit for photographic illumination
09/23/1980US4224555 Electronic flash with automatic duration control
09/17/1980EP0015454A1 Light source unit for an endoscope
09/17/1980EP0015304A1 Method and device for charging a capacitor
09/16/1980US4223247 Metal vapor discharge lamp
09/16/1980US4222647 Adaptor for auto strobo unit
09/09/1980US4221994 Photo curing light source
09/02/1980US4220896 High frequency lighting inverter with constant power ballast
09/02/1980US4220895 Non-interfering, overlapping high frequency signalling for lamp dimmer circuit
09/02/1980CA1084757A1 Regulated strobe for camera with sixth flash inhibit
08/1980
08/26/1980US4219760 SEF Lamp dimming
08/19/1980US4218637 Flasher circuit
08/12/1980US4217523 Photographic flash device
08/12/1980CA1083658A1 Ballast circuit for accurately regulating hid lamp wattage
08/05/1980US4216410 Emergency lighting system
07/1980
07/29/1980US4215292 Apparatus for operating a gaseous discharge lamp
07/22/1980US4214186 Circuit for transistor ballasts for the gentle ignition of fluorescent lamps
07/22/1980US4214171 Plural phase pulsed power supply
07/15/1980US4213076 Constant-current transformer for gas-discharge tubes
07/15/1980CA1081781A1 Discharge lamp operating circuit
07/15/1980CA1081765A1 Add-on instant restrike device for an hid lamp
07/15/1980CA1081764A1 Adapter for electronic flash unit
07/08/1980US4211958 Phantom fluorescent lamp with safety switch
07/08/1980US4211957 Amorphous metal lamp ballast having a capacitor integral with the magnetic core
07/08/1980CA1081310A1 Method for varying voltage in a high intensity discharge mercury lamp
07/08/1980CA1081307A1 Electric device provided with a switch which is designed as a discharge tube
07/01/1980US4210850 Circuits for operating electric discharge lamps
07/01/1980US4210849 Electronic control circuitry for terminating flash output
07/01/1980US4210846 Inverter circuit for energizing and dimming gas discharge lamps
06/1980
06/24/1980US4209730 Starting circuit for gaseous discharge lamps
06/17/1980US4208618 Compact single-ended fluorescent lamp
06/17/1980US4208617 Light measuring unit for an electronic flash device
06/17/1980US4208616 Inductive stabilization ballast for a discharge lamp
06/10/1980US4207498 System for energizing and dimming gas discharge lamps
06/10/1980US4207497 Ballast structure for central high frequency dimming apparatus
06/10/1980CA1079344A1 Tuned oscillator ballast circuit
06/03/1980US4206385 Ballast de-energizing circuit for high pressure metal vapor lamp system
06/03/1980CA1078914A1 Variable inductance ballast apparatus for hid lamp
05/1980
05/28/1980EP0011508A1 A method for determining the values of components for a control circuit for a gas discharge lamp
05/28/1980EP0011410A1 Electronic starter circuits for discharge lamps
05/27/1980CA1078452A1 Circuit arrangement for starting and feeding a gas and/or vapour discharge lamp
05/27/1980CA1078451A1 Ballastless discharge lamp operating circuit
05/20/1980US4204141 Adjustable DC pulse circuit for variation over a predetermined range using two timer networks
05/20/1980US4204140 Safety circuit for electronic flash apparatus
05/20/1980CA1078005A1 Extended range correct exposure annunciator
05/14/1980EP0010884A1 Electronic flash device
05/06/1980CA1077124A1 Photographic stroboscope
04/1980
04/29/1980US4200823 Strobe lamp warning apparatus
04/22/1980US4199710 Ballast circuit for high intensity discharge (HID) lamps
04/17/1980WO1980000776A1 Energy conserving automatic light output system
04/08/1980US4197485 Optocoupler dimmer circuit for high intensity, gaseous discharge lamp
04/08/1980US4197484 Electronic flash device with voltage display
04/08/1980CA1075303A1 Lamp ballast circuit
04/08/1980CA1075302A1 Low pressure sodium vapor discharge lamp starting and operating circuit
04/03/1980WO1980000647A1 Improvements in lamp drive circuits,and cine film projectors or cameras incorporating the same
04/01/1980US4196458 Photographic flashlight apparatus
04/01/1980CA1074851A1 Solid state device for lighting fluorescent tubes in emergency
03/1980
03/18/1980US4194143 Power supply for flash lamp
03/18/1980CA1073965A1 Push-pull inverter ballast for arc discharge lamps
03/11/1980CA1073568A1 Adjustable brilliance gas display system
02/1980
02/26/1980US4190795 Constant intensity light source
02/26/1980US4190790 Isolator circuit for use with frequency sensitive switching circuit
02/20/1980EP0008183A1 Photographic apparatus including an electronic flash unit
02/19/1980US4189665 Irradiation apparatus
02/19/1980US4189664 Power control unit for automatic control of power consumption in a lighting load
02/19/1980US4189663 Direct current ballasting and starting circuitry for gaseous discharge lamps
02/19/1980US4189661 Electrodeless fluorescent light source
02/19/1980US4189219 Control system for flash photographing apparatus
02/12/1980US4188661 Direct drive ballast with starting circuit
02/12/1980US4188660 Direct drive ballast circuit
02/12/1980CA1071698A1 Saturable coil starting and operating circuit for a discharge lamp
02/12/1980CA1071697A1 Energy-conserving solid-state-controlled illumination system
02/12/1980CA1071696A1 Discharge tube vapour pressure control circuit
02/05/1980US4187458 Constant power regenerative magnetic switching regulator
02/05/1980US4187450 High frequency ballast transformer
02/05/1980US4187449 Discharge lamp operating circuit
02/05/1980US4187448 Discharge lamp lighting device
02/05/1980CA1071297A1 Device for starting and feeding a discharge lamp
02/05/1980CA1071295A1 Device provided with a low-pressure sodium vapour discharge lamp
02/05/1980CA1071294A1 Automatic energy control lighting system with automatically variable dc source
1 ... 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351