| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
|---|
| 03/27/1979 | US4146819 Method for varying voltage in a high intensity discharge mercury lamp |
| 03/20/1979 | US4145638 Discharge lamp lighting system using series connected starters |
| 03/20/1979 | US4145637 Capacitor charge indicator in an electronic photoflash |
| 03/20/1979 | US4145636 Fluorescent lamp driving circuit |
| 03/13/1979 | US4144478 Lamp system take control dimming circuit |
| 03/13/1979 | US4144475 Gas and/or vapor discharge lamp |
| 03/13/1979 | US4144462 Emergency lighting fluorescent pack |
| 03/06/1979 | US4143304 Positive starting and operating apparatus for high-pressure sodium lamps |
| 03/06/1979 | US4143302 Energizing circuit for a fluorescent lamp |
| 02/27/1979 | US4142130 Multiflash operating circuit directly coupled to AC source |
| 02/13/1979 | US4139805 Multiflash system |
| 01/30/1979 | US4137484 Color improvement of high pressure sodium vapor lamps by pulsed operation |
| 01/30/1979 | US4137483 High pressure discharge lamp with a starting circuit contained therein |
| 01/16/1979 | US4135115 Wattage reducing device for fluorescent fixtures |
| 01/16/1979 | US4135114 Starting device for discharge lamp |
| 01/16/1979 | CA1046576A1 Sunlamp delayed extinction circuit |
| 01/09/1979 | US4134044 High frequency circuit for operating a high-intensity gaseous discharge lamp |
| 01/09/1979 | US4134043 Lighting circuits |
| 01/09/1979 | US4134042 Electric discharge lamp control circuit having a temperature dependent capacitor |
| 01/09/1979 | CA1046165A1 Multiple output level power supply apparatus for thermionic device |
| 01/02/1979 | US4132926 Electronic flash devices |
| 01/02/1979 | US4132925 Direct current ballasting and starting circuitry for gaseous discharge lamps |
| 01/02/1979 | US4132923 Circuit for light-integrator-controlled electronic flash unit |
| 12/19/1978 | US4130780 Electronic photoflash |
| 12/12/1978 | US4129805 Impulse generator for use with phosphor energizable lamps |
| 12/12/1978 | CA1044311A1 Dimmer for discharge lamp utilizing a pulse enabling circuit |
| 12/12/1978 | CA1044310A1 Synthesis of dimmer output waveform within the dimmer logic circuit |
| 12/12/1978 | CA1044309A1 Starterless circuit arrangement for the ignition and operation of one or a number of low voltage fluorescent lamps connected in series |
| 12/05/1978 | US4128789 Sodium |
| 12/05/1978 | US4128788 Method and apparatus for operating a gaseous discharge lamp with improved efficiency |
| 12/05/1978 | US4128786 Control of electronically generated light pulses |
| 11/28/1978 | US4127893 Tuned oscillator ballast circuit with transient compensating means |
| 11/28/1978 | US4127798 Lamp circuit |
| 11/28/1978 | US4127797 Inverter oscillator with current feedback |
| 11/28/1978 | US4127795 Lamp ballast circuit |
| 11/21/1978 | CA1042977A1 Voltage monitoring controlling and protecting apparatus employing programmable unijunction transistor |
| 11/14/1978 | CA1042512A1 Voltage indication means of an electronic flashing device |
| 11/14/1978 | CA1042501A1 High frequency lamp operating circuit |
| 11/14/1978 | CA1042500A1 Solid state chopper ballast for gaseous discharge lamps |
| 11/14/1978 | CA1042499A1 Ballast circuit with integral time delay relay |
| 11/14/1978 | CA1042498A1 Thermal regulator ballast |
| 11/07/1978 | US4124842 Morse code signalling device |
| 11/07/1978 | CA1042064A1 Circuit for powering fluorescent lamps |
| 11/07/1978 | CA1042063A1 Electronic flash device |
| 10/31/1978 | US4123690 Discharge lamp ballast circuit |
| 10/31/1978 | CA1041595A1 Emergency lighting system |
| 10/24/1978 | US4122465 Device for indicating condition of exposure in an automatic control type electronic flash unit for flash photography |
| 10/24/1978 | US4122375 Circuit arrangement for increasing the luminous flux in fluorescent tube hand lamps |
| 10/24/1978 | US4122374 Circuit arrangement for increasing the luminuous flux in fluorescent tube hand lamps |
| 10/24/1978 | CA1041160A1 High intensity lamp dimming circuit |
| 10/17/1978 | US4121136 Apparatus for feeding discharge lamps from a direct current source |
| 10/17/1978 | CA1040702A1 Arrangement provided with a gas and/or vapour discharge lamp |
| 10/17/1978 | CA1040701A1 Solid-state hid lamp dimmer |
| 10/10/1978 | US4120038 Flash unit with electronic exposure setting calculator |
| 10/10/1978 | US4119889 Method and means for improving the efficiency of light generation by an electrodeless fluorescent lamp |
| 10/10/1978 | US4119888 Operating circuit for flash lamp directly coupled to AC source |
| 10/10/1978 | US4119887 Starter for discharge lamp |
| 10/10/1978 | US4119886 Condenser, inductor, ceramics |
| 10/10/1978 | CA1040318A1 Manufacture of circuit boards with radiation-curable ink |
| 10/03/1978 | US4118758 Photoflash lamp array having high voltage shorting type flash lamps and radiation sensitive switching elements |
| 10/03/1978 | US4118715 Electronic photoflash having a terminal board |
| 10/03/1978 | CA1039795A1 Discharge lamp lighting apparatus and method |
| 10/03/1978 | CA1039794A1 Ballast control device |
| 09/26/1978 | US4117377 Circuits for starting and operating ionized gas lamps |
| 09/26/1978 | US4117373 Emergency/normal lighting circuit for a gaseous discharge lamp |
| 09/26/1978 | CA1039346A1 Spark sources with electronic switching tubes |
| 09/26/1978 | CA1039345A1 Ballast having integral time delay relay |
| 09/19/1978 | US4114531 Compacting apparatus |
| 09/05/1978 | US4112335 Rapid pulse ultraviolet light apparatus |
| 09/05/1978 | US4112334 Ignition system for extending the lifetime of gas filled electric lamps |
| 09/05/1978 | US4112331 Device for improving the efficiency of a low-pressure sodium vapor discharge lamp |
| 09/05/1978 | CA1038025A1 Turn on/turn off circuit for the direct current operation of gaseous discharge lamps |
| 09/05/1978 | CA1038024A2 Laser power supply |
| 09/05/1978 | CA1038022A2 Laser power supply |
| 09/05/1978 | CA1038021A1 Laser power supply |
| 08/29/1978 | US4110663 Plasma display panel driving circuit including apparatus for producing high frequency pulses without the use of clock pulses |
| 08/29/1978 | CA1037551A2 Electronic flash apparatus |
| 08/22/1978 | US4109307 High power factor conversion circuitry |
| 08/15/1978 | US4107581 Fluorescent lamp insert with conductive rod support |
| 08/15/1978 | US4107580 Ballast circuit for gas glow discharge devices |
| 08/15/1978 | US4107579 Starting and operating ballast for high pressure sodium lamp |
| 08/08/1978 | US4105929 Shunt triggered flashtube having safety feature |
| 08/01/1978 | US4104562 Traffic light dimmer system |
| 07/25/1978 | US4103298 Alarm device |
| 07/25/1978 | US4103209 Add-on instant restrike device for an hid lamp |
| 07/18/1978 | US4101812 Photographic flash unit |
| 07/18/1978 | US4101809 Discharge lamp operating circuit |
| 07/18/1978 | US4101807 Method and apparatus for controlling the temperature of low pressure metal or metal halide lamps |
| 07/18/1978 | US4101806 Ballast emi and shock hazard reduction |
| 07/11/1978 | US4100476 Single secondary dimming inverter/ballast for gas discharge lamps |
| 07/11/1978 | US4100462 Combination incandescent/fluorescent lighting system |
| 07/11/1978 | US4100459 Indicator circuit for electronic flash apparatus |
| 07/04/1978 | US4099100 Neon tube flashing device |
| 07/04/1978 | US4099095 Operating circuit for gaseous discharge and incandescent lamps |
| 06/27/1978 | US4097880 Photographic stroboscope |
| 06/27/1978 | US4097777 Arc discharge lamp including starting circuit |
| 06/20/1978 | US4096492 Camera with detachable electronic flash unit and exposure control system therefor |
| 06/20/1978 | US4096413 Flicker eliminating intensity controller for discharge lamp dimming circuit |
| 06/20/1978 | US4096411 Gas discharge tube and means for maintaining an invisible gas discharge therein |
| 06/20/1978 | US4096410 Inverter circuit protection |