| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
|---|
| 02/05/1980 | CA1071292A1 Signalling device |
| 01/29/1980 | US4186328 Electronic flash |
| 01/29/1980 | CA1070763A1 Ac inverter with constant power output |
| 01/29/1980 | CA1070751A1 Light generation by an electrodeless fluorescent lamp |
| 01/22/1980 | US4185233 High efficiency ballast system for gaseous discharge lamps |
| 01/22/1980 | US4185232 Multiple flashlamp operating circuit |
| 01/22/1980 | US4185231 High efficiency ballast system for gaseous discharge lamps |
| 01/22/1980 | US4184756 Strobe without primary storage capacitor |
| 01/22/1980 | CA1070372A1 Starting and operating apparatus for high pressure sodium lamps |
| 01/15/1980 | US4184128 High efficiency push-pull inverters |
| 01/15/1980 | US4184103 Gas discharge lamp ballast with equally spaced windings |
| 01/15/1980 | US4183647 Electronic flash apparatus |
| 01/10/1980 | WO1980000039A1 Electronic flash with automatic light control |
| 01/08/1980 | US4182561 Fast charging electronic flash device |
| 01/01/1980 | US4181873 High frequency dimmer circuit for high intensity, gaseous discharge lamp |
| 01/01/1980 | US4181872 Starter for igniting a gas and/or vapor discharge lamp |
| 01/01/1980 | CA1069167A Circuits for operating electric discharge lamps |
| 12/25/1979 | US4180764 Control circuit for an A.C. discharge lamp |
| 12/25/1979 | CA1068771A Rapid pulse ultraviolet light apparatus |
| 12/18/1979 | US4179641 Circuits for operating discharge lamps |
| 12/11/1979 | CA1067951A1 Ballast unit for gas discharge lamps |
| 12/04/1979 | US4177403 Electronic starter for igniting a discharge lamp |
| 11/28/1979 | EP0005595A1 Laser flashtube power supply |
| 11/27/1979 | US4176296 Core mounting for solenoidal electric field lamps |
| 11/20/1979 | US4174896 Adapter for electronic flash unit |
| 11/13/1979 | CA1066356A1 Wide range power control for electric discharge lamp and press using the same |
| 11/06/1979 | US4173730 Compact fluorescent lamp unit having integral circuit means for DC operation |
| 10/30/1979 | US4172981 Lighting system |
| 10/30/1979 | CA1065391A1 Correct exposure annunciator circuit |
| 10/23/1979 | CA1065007A1 Ignition circuit for a discharge lamp |
| 10/18/1979 | WO1979000793A1 Ignitting means for discharge lamp of reproducer |
| 10/09/1979 | US4170747 Fixed frequency, variable duty cycle, square wave dimmer for high intensity gaseous discharge lamp |
| 10/09/1979 | US4170746 High frequency operation of miniature metal vapor discharge lamps |
| 10/09/1979 | US4170745 Lamp flashing circuit for line generating photoexposure device |
| 10/09/1979 | US4170744 Combination discharge-incandescent lamp with thermal switch control |
| 10/09/1979 | CA1064100A1 Positive starting and operating apparatus for high-pressure sodium lamps |
| 10/09/1979 | CA1064099A1 Lead-lag, series-sequence starting and operating apparatus for three to six fluorescent lamps |
| 10/09/1979 | CA1064098A1 Flashing circuitry |
| 10/09/1979 | CA1064097A1 Apparatus and method for sustaining the operation of hid lamps |
| 10/09/1979 | CA1064096A1 Regulated strobe with hysteresis |
| 10/09/1979 | CA1064095A1 Electronic flash power conserving circuit |
| 09/25/1979 | US4169259 Frequency sensitive switching circuit |
| 09/25/1979 | CA1063161A1 Pulsed metal or metal halide lamps for photocopying applications |
| 09/19/1979 | EP0004082A1 Method for energizing high pressure metal vapour discharge lamps |
| 09/18/1979 | US4168453 Variable intensity control apparatus for operating a gas discharge lamp |
| 09/18/1979 | CA1062765A1 Ballast circuit for eliminating flicker in gaseous discharge lamps |
| 09/18/1979 | CA1062764A1 Lamp starting and operating circuit |
| 09/11/1979 | US4167689 Solid state lamp ballast |
| 09/06/1979 | WO1979000615A1 Electronic arrangement for adjusting the light intensity of an electrical discharge lamp without incandescent cathode |
| 08/28/1979 | CA1061401A1 Device for the supply of an electric discharge lamp |
| 08/22/1979 | EP0003528A1 Electronic device for controlling the light intensity of a gaseous discharge lamp without a heated cathode |
| 08/21/1979 | US4165475 Discharge lamp with starter circuit |
| 08/21/1979 | CA1060945A1 Starting and operating circuit for gaseous discharge lamps |
| 08/14/1979 | US4164686 Load current pulse control devices |
| 08/14/1979 | US4164679 Strobe lamp series triggering circuit |
| 08/14/1979 | CA1060536A1 Starting and operating circuit for gaseous discharge lamps |
| 08/07/1979 | US4163925 Two-wire ballast for fluorescent tube dimming |
| 08/07/1979 | US4163924 Circuit for turning on a charging-completion indicator separate from a flash unit |
| 07/31/1979 | US4163178 Flash light discharge device |
| 07/31/1979 | US4163177 Oscillation generator providing oscillations of varying amplitude |
| 07/31/1979 | US4163176 Energy saving fluorescent lamp |
| 07/31/1979 | CA1059580A1 Voltage doubler type power supply for a gas discharge lamp |
| 07/26/1979 | WO1979000449A1 Variable intensity control apparatus for operating a gas discharge lamp |
| 07/24/1979 | US4162430 Compact ballast for fluorescent lamp which provides excellent lamp power regulation |
| 07/24/1979 | US4162429 Ballast circuit for accurately regulating HID lamp wattage |
| 07/24/1979 | US4162428 Variable inductance ballast apparatus for HID lamp |
| 07/24/1979 | US4162426 Zone responsive, light-sensing circuit for controlling flash photographing |
| 07/17/1979 | CA1058690A1 Fluorescent lamp insert with conductive rod support |
| 07/10/1979 | US4160933 Accidental flash prevention in a photographic flash device |
| 07/10/1979 | CA1058279A1 Low-cost power-reducing device for hid lamp |
| 07/10/1979 | CA1058278A1 Solid-state dimmer for dual high pressure disclosure lamps |
| 07/10/1979 | CA1058277A1 High pressure discharge lamp dimming circuit utilizing variable duty-cycle photocoupier |
| 07/10/1979 | CA1058276A1 Electronic flash unit for cameras adapted to receive flashbulbs |
| 07/03/1979 | US4160193 Metal vapor electric discharge lamp system |
| 07/03/1979 | US4160190 Circuit comprising an air gap for driving a laser |
| 07/03/1979 | US4160160 Circuit for integrating a quantity of light in an automatic control type flash unit |
| 06/19/1979 | US4158793 Gas discharge lamp control circuit |
| 06/19/1979 | US4158792 Light control device for high frequency lighted fluorescent lamp |
| 06/19/1979 | CA1056900A1 Dimming circuit with saturated semiconductor device |
| 06/12/1979 | US4158156 Electron ballast apparatus for gaseous discharge lamps |
| 06/12/1979 | US4158155 Ignition circuit for extinguishing tubes in electronic flash equipment |
| 05/29/1979 | US4156810 Transmitting device of light signal for remote control |
| 05/29/1979 | CA1055562A1 Capacitive ballast circuit for a discharge lamp |
| 05/15/1979 | US4155031 Electronic flash apparatus |
| 05/15/1979 | US4155029 Auxiliary electronic flash apparatus |
| 05/15/1979 | CA1054667A1 Device for replacing a fluorescent lamp in a serially connected fluorescent lamp system |
| 05/01/1979 | US4152628 Circuit arrangement for starting and feeding a gas and/or vapor discharge lamp |
| 05/01/1979 | CA1053744A1 Discharge lamp lighting device using a backswing booster |
| 04/24/1979 | US4151446 Electronic flash apparatus |
| 04/24/1979 | US4151445 Instant light lamp control circuit |
| 04/24/1979 | CA1053320A1 Trigger device for an electronic flash unit |
| 04/24/1979 | CA1053052A1 Camera with detachable electronic flash unit and exposure control system therefor |
| 04/17/1979 | US4150323 Intensity control of fluorescent lamps |
| 04/10/1979 | US4149113 D. C. Powered control circuit for energizing a cold cathode lamp |
| 04/10/1979 | CA1052441A1 Starting and operating ballast for high pressure sodium lamps |
| 04/10/1979 | CA1052440A1 Fluorescent lamp dimming circuit employing an improved auxiliary circuit |
| 04/03/1979 | US4147962 Energy-conserving illumination system |
| 04/03/1979 | US4147961 Energy-conserving solid-state-controlled illumination system |
| 03/27/1979 | US4146821 Ac powered flash tube control circuit |
| 03/27/1979 | US4146820 Fluorescent lamp power reducer |