| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
|---|
| 06/13/1978 | US4095141 Electronic flash device |
| 06/13/1978 | US4095140 Trigger circuit for flash lamp directly coupled to ac source |
| 05/30/1978 | US4092565 Pulse circuit for gaseous discharge lamps |
| 05/30/1978 | US4092564 Discharge lamp operating circuit |
| 05/30/1978 | US4092562 Fluorescent lamp unit for multiple installation |
| 05/23/1978 | US4091398 Electronic photoflash unit having remote control device transmitter function |
| 05/23/1978 | US4091308 Electronic photographic flash apparatus |
| 05/23/1978 | US4091307 Emergency lighting system for gaseous-discharge lamps |
| 05/02/1978 | US4087723 Arrangement for starting and operating a discharge lamp |
| 05/02/1978 | US4087722 Apparatus and method for supplying power to gas discharge lamp systems |
| 04/18/1978 | US4085353 Remote sensor trigger circuit |
| 04/04/1978 | US4082985 Gas discharge flash lamp with piezoelectric trigger generator |
| 04/04/1978 | US4082984 Electric flash device with printed coil transformer |
| 04/04/1978 | US4082983 Capacitor charging system for electronic flash apparatus |
| 04/04/1978 | US4082982 Automatic electronic flash device |
| 04/04/1978 | US4082981 Energy saving device for a standard fluorescent lamp system |
| 03/28/1978 | US4081718 Discharge lamp lighting device using a backswing booster |
| 03/14/1978 | US4079292 Arc discharge sustaining circuit system for a discharge lamp |
| 02/21/1978 | US4075536 Capacitor charging system |
| 02/21/1978 | US4075476 Sinusoidal wave oscillator ballast circuit |
| 02/14/1978 | US4074172 Discharge lamp operating circuit |
| 02/14/1978 | US4074171 Electronic flash device |
| 02/14/1978 | US4074170 Voltage regulator with thermal overload protection |
| 02/07/1978 | US4072878 Starting and operating apparatus for high pressure sodium lamp ballasts |
| 01/31/1978 | US4071884 Integrated circuit high voltage DC converter |
| 01/31/1978 | US4071812 AC Inverter with constant power output |
| 01/31/1978 | US4071808 Method and circuit for operating an electrical flash-tube |
| 01/31/1978 | US4071807 Fluorescent lamp lighting device |
| 01/24/1978 | US4070601 Circuit arrangement for igniting at least one gas discharge flash tube |
| 01/17/1978 | US4069442 Pulse circuit for gaseous discharge lamps |
| 01/10/1978 | US4068151 Regulated strobe with hysteresis |
| 01/10/1978 | US4068150 Voltage indication means for an electronic flashing device |
| 01/03/1978 | US4067028 Proper synchronization of the firing of electronic flash units |
| 01/03/1978 | US4066932 Saturable reactor device for operating a discharge lamp |
| 01/03/1978 | US4066931 Shunt modulator for high current arc lamp |
| 01/03/1978 | US4066930 Energizing circuits for fluorescent lamps |
| 12/27/1977 | US4065700 D. C. powered strobe light |
| 12/20/1977 | US4064519 Regulated strobe for camera with sixth flash inhibit |
| 12/20/1977 | US4064418 Controlled arc stream in high intensity discharge lamps |
| 12/20/1977 | US4064416 Starting and operating device for a high pressure discharge lamp |
| 12/20/1977 | US4064414 Apparatus for simulating the light produced by a fire |
| 12/06/1977 | US4062027 Data exposure device for camera |
| 11/29/1977 | US4060752 Discharge lamp auxiliary circuit with dI/dt switching control |
| 11/29/1977 | US4060751 Dual mode solid state inverter circuit for starting and ballasting gas discharge lamps |
| 11/08/1977 | US4057750 Apparatus and method for sustaining the operation of HID lamps |
| 10/18/1977 | US4054815 Circuit arrangement for igniting a gas discharge flash tube |
| 10/11/1977 | US4053814 Continuous automatic starting assist uv circuit for microwave powered electrodeless lamps |
| 10/11/1977 | US4053813 Discharge lamp ballast with resonant starting |
| 10/11/1977 | US4053811 Fluorescent lamp simulator |
| 10/04/1977 | US4052644 Electronic flash unit with operational signal |
| 09/27/1977 | US4051412 Discharge lamp operating circuit |
| 09/27/1977 | US4051411 Discharge lamp operating circuit |
| 09/27/1977 | US4051410 Discharge lamp operating circuit |
| 09/27/1977 | US4051407 Or vapor discharge lamp |
| 09/20/1977 | US4050004 Cardiac pacer including controlled voltage multiplier |
| 09/20/1977 | US4049996 Control of electronically generated light pulses |
| 09/13/1977 | US4048543 Discharge lamp operating circuit |
| 09/13/1977 | US4048540 Electronic flash unit serving both as transmitter of a remote control and flash unit for flash photography |
| 09/13/1977 | US4048539 Alternating current ionizing potential |
| 08/30/1977 | US4045711 Tuned oscillator ballast circuit |
| 08/30/1977 | US4045710 Discharge lamp operating circuit |
| 08/30/1977 | US4045709 Discharge lamp operating circuit |
| 08/30/1977 | US4045708 Discharge lamp ballast circuit |
| 08/30/1977 | US4045664 Lighting fitting provided with at least two-low-pressure mercury vapor discharge lamps |
| 08/16/1977 | US4042856 Chopper ballast for gaseous discharge lamps with auxiliary capacitor energy storage |
| 08/16/1977 | US4042855 High frequency transistor ballast |
| 08/16/1977 | US4042852 Fluorescent lamps with high frequency power supply with inductive coupling and SCR starter |
| 08/16/1977 | US4042850 Microwave generated radiation apparatus |
| 08/09/1977 | US4041352 Automatic starting system for solid state powered electrodeless lamps |
| 08/09/1977 | US4041351 Flash lamp power supply with direct energization from an AC power supply source |
| 08/02/1977 | US4039898 Electronic flash apparatus |
| 08/02/1977 | US4039897 System for controlling power applied to a gas discharge lamp |
| 08/02/1977 | US4039895 Device for starting and feeding a discharge lamp |
| 07/19/1977 | US4037148 Ballast control device |
| 07/19/1977 | US4037136 Circuit arrangement for igniting at least one gas discharge flash lamp |
| 07/12/1977 | US4035814 Electronic flash apparatus controlled by a digital memory system |
| 07/05/1977 | US4034278 Charging circuit for a flash capacitor |
| 07/05/1977 | US4033263 Wide range power control for electric discharge lamp and press using the same |
| 06/28/1977 | US4032817 Wide range power control for electric discharge lamp and press using the same |
| 06/14/1977 | US4029992 Flash apparatus with flash terminating switch controlled by photosensor |
| 06/14/1977 | US4029989 Electric discharge lamp with voltage multiplier circuit having a capacitance which changes with temperature |
| 05/24/1977 | US4025817 Trigger device for an electronic flash unit |
| 05/24/1977 | US4025440 Device for regulating a xenon lamp with optical and temperature compensation |
| 05/17/1977 | US4024549 Auto-strobe means for cameras |
| 05/10/1977 | US4023068 Electronic flash apparatus for conserving flash battery life |
| 05/10/1977 | US4023067 Inverter ballast circuit |
| 05/10/1977 | US4023066 Operating circuit for a gas and/or vapour discharge lamp |
| 05/03/1977 | USRE29204 Controlled high voltage lighting system for gaseous-discharge lamps |
| 05/03/1977 | US4021698 Control device for automatically controlling the quantity of light from flash apparatus |
| 04/19/1977 | US4019092 Photographic flash apparatus |
| 04/12/1977 | US4017785 Power source for fluorescent lamps and the like |
| 04/12/1977 | US4017763 Device for triggering the discharge of flash tubes |
| 04/12/1977 | US4017761 Or vapor discharge lamp |
| 04/05/1977 | US4016477 Novel multi-path leakage transformer and inverter ballast |
| 04/05/1977 | US4016452 Lamp ballast circuit |
| 04/05/1977 | US4016451 High pressure discharge lamp dimming circuit utilizing variable duty-cycle photocoupler |
| 03/29/1977 | US4015167 Circuits for operating electric discharge lamps |
| 03/22/1977 | US4013922 Sunlamp device |
| 03/22/1977 | US4013921 Warning light control |
| 03/15/1977 | US4012665 Electronic flash device with capacitor discharge cut-off before full discharge |