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| Number | Title | Issue Date |
| 7331837 | Coil antenna/protection for ceramic metal halide lamps The invention relates to a high-pressure discharge lamp of the ceramic metal halide type of the Philips MasterColor series having a molybdenum coil wrapped around the discharge vessel and at least a portion of the electrode feed through means, and having power range... | 02/19/2008 |
| 7317171 | Method and apparatus for generating an electric arc A method and apparatus for reducing the gap resistance between two electrodes, such as the electrodes used fusion splicing one optical fiber to another, by injecting negative ions into the gas or gasses that are located between the electrodes. As a result, the volta... | 01/08/2008 |
| 7301283 | Starting aid for low wattage metal halide lamps An arc discharge lamp (60) contains an arc tube (62) containing an arc generating and sustaining medium. The arc tube (62) has at least one press seal (64). Means (66) for coupling electrical energy to the interior of the arc tube ... | 11/27/2007 |
| 7170200 | Starter assembly for a gas discharge lamp The present invention comprises a unique starter assembly for a gas discharge lamp. The starter assembly comprises a main current path with a first leg connected to one electrode of a gas discharge lamp, and a second leg connected to a second electrode of the gas di... | 01/30/2007 |
| 7132800 | High-pressure discharge lamp A high-pressure discharge lamp has a discharge vessel that is enclosed, with an interspace, by an outer bulb. The end of the outer bulb is provided with a lamp cap. The lamp has an ignition circuit including a series connection of a glow starter and an ohmic impedan... | 11/07/2006 |
| 7057345 | Short arc discharge lamp and light source device A short arc discharge lamp has improved starting properties in which there is no danger of damaging the arc tube that surrounds a discharge space and in which the radiant light from the arc tube is not adversely shielded. This is achieved by providing the short arc ... | 06/06/2006 |
| 6972529 | Switch mode power supply for a gas discharge lamp A switch mode power supply for igniting and operating a high-pressure gas discharge lamp includes an ignition sub-circuit which is coupled via a transformer to the circuit. The ignition sub-circuit has at least an ignition capacitor, and a switching element for disc... | 12/06/2005 |
| 6956555 | Light modulation information display device and illumination control device An illumination control device for illuminating an light modulation information display device with light includes: at least one illumination device for irradiating light which is generated through discharging; and a driving waveform generation section for controlli... | 10/18/2005 |
| 6919686 | Discharge lamp having an auxiliary light source to produce light with a short wavelength The discharge lamp of the invention includes a main discharge vessel which is filled with a discharge medium for the main discharge via a pair of opposed main discharge electrodes, and has a first electrode sealing part and a second electrode sealing part for connec... | 07/19/2005 |
| 6917163 | Inductively powered lamp assembly A lamp assembly configured to inductively receive power from a primary coil. The inductively powered lamp assembly includes a lamp circuit including a secondary and a lamp connected in series. In a first aspect, the lamp circuit includes a capacitor connected in ser... | 07/12/2005 |
| 6908586 | Free radical polymerization method having reduced premature termination, apparatus for performing the method and product formed thereby A method of polymerizing by a free radical polymerization mechanism, product formed thereby, and apparatus for performing this method, are disclosed. The composition to be polymerized by the free radical polymerization mechanism is irradiated by a substantially cons... | 06/21/2005 |
| 6661177 | High-pressure discharge lamp with ignition circuit including halogen incandescent lamp The invention relates to a high-pressure discharge lamp comprising a discharge vessel which is enclosed, with clearance, by an outer bulb. The outer bulb is closed at one end by a lamp cap. The lamp is provided with an ignition circuit including at least ... | 12/09/2003 |
| 6639365 | Ultra-compact arc discharge lamp system with an additional electrode An arc discharge lamp system comprises a third electrode for igniting the arc discharge lamp in addition to first and second electrodes which provide a main discharge current path for sustaining arc discharge after the lamp has been ignited by a high-volt... | 10/28/2003 |
| 6566817 | High intensity discharge lamp with only one electrode A high intensity discharge (HID) lamp includes a starting gas, a vaporizable fill, and only one electrode sealed within a light transmissive envelope. The one electrode produces a high intensity discharge during operation of the lamp and is connected to a... | 05/20/2003 |
| 6541915 | High pressure arc lamp assisted start up device and method Start-up and re-ignition of a high pressure arc lamp are aided by injection of electrons toward a high pressure arc lamp electrode. A microdischarge device directs electrons toward an electrode of the arc lamp and is preferably turned off during normal op... | 04/01/2003 |
| 6459204 | Dual-element 3-way compact fluorescent lamp The present invention relates to a compact 3-way fluorescent lamp that is designed to serve as a replacement for a 3-way incandescent bulb. This novel compact 3-way fluorescent lamp uses only two fluorescent tubes, where one tube has twice the wattage rat... | 10/01/2002 |
| 6400087 | Unit comprising a high-pressure discharge lamp and an ignition antenna A short-arc discharge lamp (1) is provided with a light-transmitting, gastight lamp vessel (10), which is provided with an ionizable filling. A first electrode and a second electrode (11a, 11b), respectively, are arranged in the lamp vessel (10) and are e... | 06/04/2002 |
| 6392343 | Metal halide lamp The invention relates to a metal halide lamp having an outer bulb containing besides a discharge vessel a UV enhancer (UVE). The UVE has a ceramic wall and, according to the invention, is provided with a pair of internal electrodes. Preferably, at least o... | 05/21/2002 |
| 6380679 | Short-arc discharge lamp with a starting antenna A short-arc discharge lamp (1) is provided with a translucent lamp vessel (10) which is closed in a gas-tight manner and which is provided with an ionizable fill. A first and a second electrode (11a, 11b) are arranged in the lamp vessel (10) which are eac... | 04/30/2002 |
| 6288491 | Metal halide lamp To achieve the foregoing objects and in accordance with the purpose of the invention, as embodied and broadly described herein, the metal halide lamp of this invention comprises a vitreous arc tube containing an ionizable medium and having electrodes seal... | 09/11/2001 |
| 6194834 | Gas discharge lamp, in particular for a motor-vehicle headlight Proposed is a gaseous-discharge lamp, in particular for motor-vehicle headlamps, comprising a burner vessel of glass or the like having at least two electrodes, the burner vessel being provided with a lamp base that includes the electrical terminals and t... | 02/27/2001 |
| 6177765 | Active diode protection apparatus in metal halide lamps A metal halide lamp, having a cold fill pressure of at least 50 torr, incorporates a starter circuit with an active device to protect the diode included therein. The active portion of the starter circuit, either removes a voltage multiplying circuit porti... | 01/23/2001 |
| 6114809 | Planar fluorescent lamp with starter and heater circuit A planar fluorescent lamp having a resistive trace and optically transmissive cover electrodes is described. In one embodiment, the lamp includes an insulative lamp body with the transparent cover electrodes supported by the lamp cover. The resistive trac... | 09/05/2000 |
| 6034477 | High-pressure discharge lamp A high-pressure discharge lamp provided with an outer bulb enclosing a discharge tube accommodates a transformer having primary winding which forms part of a current conductor to one of the main electrodes of the discharge tube. The secondary winding is c... | 03/07/2000 |
| 5747946 | Gas discharge lamps and systems A fluorescent discharge lamp has two glow mode electrodes wound around it in a helical fashion. One circuit drives the main electrodes at opposite ends of the lamp at high levels of brightness. Another circuit drives the glow mode electrodes at low levels... | 05/05/1998 |
| 5331250 | Thick film resistor for use in a vacuum and a high pressure discharge lamp having such a resistor A high pressure discharge lamp having a thick film resistor comprising a plurality of resistive elements. A first resistive element is included in a starting circuit for the lamp and a second resistive element is in series with the arc tube during lamp op... | 07/19/1994 |
| 5323087 | Ultraviolet radiation starting source and lamp containing same An ultraviolet radiation starting source for an arc discharge lamp includes a sealed envelope with a press seal, a gaseous fill material within the envelope, a molybdenum ribbon which extends from the press seal into the interior region of the envelope an... | 06/21/1994 |
| 5276385 | High-pressure discharge lamp and lighting method The invention provides a high-pressure discharge lamp incorporating an outer envelope storing a pair of electric terminals a plurality of arc tubes which are respectively stored in this outer envelope and electrically connected in parallel, and a pluralit... | 01/04/1994 |
| 5187416 | Arc discharge lamp with a vertical thermal switch extending between the lamp stem and inner neck wall An arc discharge lamp having an arc tube mounted within a lamp envelope includes a thermal switch for controlling application of electrical energy to a starting electrode. The thermal switch is mounted between the arc tube and the lamp base with its longi... | 02/16/1993 |
| 5159242 | High pressure discharge lamp having an integral thick film resistor with multiple resistive elements A high pressure discharge lamp having a thick film resistor comprising a plurality of resistive elements. A first resistive element is included in a starting circuit for the lamp and a second resistive element is in series with the arc tube during lamp op... | 10/27/1992 |
| 5079480 | Bimetal/resistor switch and ceramic bridge assembly for metal halide lamps A high pressure lamp assembly having an improved structure for supporting the discharge tube while providing an opening bi-metallic switch for electrically disconnecting the auxiliary electrode. Metallic frames are disposed at the upper and lower ends of ... | 01/07/1992 |
| 5045757 | Metal vapor discharge lamp A metal vapor discharge lamp comprising a FEC. a semiconductor switch and a thermal response switch and operated at a supply voltage of 100 to 130 V. The thickness if the FEC is 0.45 to 0.8 mm and the breakover voltage of the semiconductor switch is 60 to... | 09/03/1991 |
| 5015916 | Electric discharge lamp and thermal switch starter means therefor An electric discharge lamp is disclosed utilizing an improved thermally responsive switch for operation of an auxiliary starting electrode. The improved switch has a more compact structural configuration which further accommodates temperature excursions b... | 05/14/1991 |
| 4992703 | Metal halide lamp with dual starting electrodes and improved maintenance A metal halide high intensity discharge lamp having an arc tube assembly including a pair of discharge electrodes and a pair of starting electrodes. Each starting electrode is adjacent a respective discharge electrode. During starting, the lamp makes the ... | 02/12/1991 |
| 4987344 | Arc discharge lamp with internal starter A high intensity discharge lamp (e.g., a metal halide) containing an arc tube having first and second electrodes respectively sealed at opposite ends thereof. An outer envelope surrounds the arc tube and has a lamp base disposed at one end thereof. The la... | 01/22/1991 |
| 4981330 | High-pressure sodium vapor discharge lamp A high-pressure sodium vapor discharge lamp having a discharge vessel in which main electrodes are arranged and an ignition system which comprises an electric conductor surrounding the discharge vessel over at least a part of its circumference, which cond... | 01/01/1991 |
| 4962335 | Deuterium lamp voltage supply means A deuterium lamp starting circuit utilizing the arc-defining aperture cage of the lamp as the arc-starting electrode to enable the application of a positive, low starting voltage simultaneously with the application of the filament voltage. This positive, ... | 10/09/1990 |
| 4910437 | High-pressure discharge lamp A high-pressure discharge lamp comprising a discharge vessel provided with an external auxiliary electrode connected to a starter circuit in the lamp. The starter circuit comprises a voltage division circuit between the connection terminals of the lamp an... | 03/20/1990 |
| 4853591 | Multiple-tube compact low-pressure discharge fluorescent lamp At least two discharge units (2, 3; 14, 15, 16; 21, 22, 23, 27, 28, 29) are ocated adjacent each other, each of the discharge units preferably including a unitary U-shaped tube having two longitudinal leg portions (2a, 2b; 3a, 3b) extending parallel to eac... | 08/01/1989 |
| 4818915 | Arc discharge lamp with ultraviolet radiation starting source A metal halide arc discharge lamp comprises an arc tube containing a chemical fill including mercury and metal halides and having first and second electrodes respectively sealed at opposite ends thereof. An outer envelope surrounds the arc tube and has fi... | 04/04/1989 |
