Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 8174193 | Vehicular discharge lamp A vehicular discharge lamp includes a pair of electrodes including sealed portions sealed in a pair of pinch seal portions of a light emitting tube, wherein each of the sealed portions is segmented into: a first intermediate region positioned in the middle of the el... | 05/08/2012 |
| 8148901 | Light source apparatus with power feeder structure A light source apparatus, comprises a lamp housing, a xenon lamp provided in the lamp housing, a reflection mirror which reflects light emitted from the xenon lamp, and first and second power feeders which supply electric power to the xenon lamp, wherein a direction... | 04/03/2012 |
| 8148902 | Mercury-free arc tube for discharge lamp device and method for manufacturing the same In a mercury-free arc tube, regions including molybdenum foils 17 of electrode assemblies each of which is formed by connecting and integrating an electrode 16, a molybdenum foil 17, and a lead wire 18, are pinch-sealed where the electrod... | 04/03/2012 |
| 8115389 | High pressure discharge lamp To provide a high pressure discharge lamp in which no fusing of the metal foil occurs even if the high pressure discharge lamp is switched on for a certain time a high pressure discharge lamp is provided having a discharge vessel comprised of a light emission part a... | 02/14/2012 |
| 8084944 | Lamp device and method for the production of a lamp device A lamp device (1), wherein the lamp device (1) has at least one contact conductor (31) and a vessel (20) for enclosing a gas. The vessel (20) delimits a primary volume (40) and a secondary volume (41), the primary vol... | 12/27/2011 |
| 8072145 | Extra high pressure mercury lamp with each electrode held by a sealing portion An extra high pressure mercury lamp that includes an arc tube, which includes a light emission section enclosing 0.2 mg/mm3 or more of mercury, sealing sections that respectively extend from both ends of the light emission section, a pair of electrodes th... | 12/06/2011 |
| 8053990 | High intensity discharge lamp having composite leg A system, in certain embodiments, includes a high intensity discharge lamp having a composite leg. The composite leg includes a plurality of leg sections coupled together in series. The plurality of leg sections includes different materials, coefficients of thermal ... | 11/08/2011 |
| 8035304 | Ceramic high intensity discharge lamp having uniquely shaped shoulder A high intensity discharge lamp, in certain embodiments, includes a uniquely shaped shoulder and dimensions selected to reduce stress and associated cracking. The uniquely shaped shoulder has a variable diameter, such as, e.g., a cup-shaped geometry, a curved funnel... | 10/11/2011 |
| 8004194 | High-pressure discharge lamp The lamp uses a sealing system with a ceramic supporting element (17) having a short length LA together with a W—Nb leadthrough part (18, 19, 20) and a specially adapted glass solder (21), which is based on an Al2O3 rare ... | 08/23/2011 |
| 7994720 | High pressure discharge lamp containing a getter device A miniaturized high pressure discharge lamp containing a getter device is provided in which the getter device is positioned in such a way as to minimize or completely suppress the shadow effect with respect to the light emitted by the lamp burner. ... | 08/09/2011 |
| 7982399 | High-pressure gas discharge lamp having electrode rods with crack-initiating means A high-pressure gas discharge lamp has a bulb of quartz glass and two electrode rods. One end of each electrode rod is connected to a molybdenum foil member embedded in the quartz glass material, while the other end of each electrode rod projects into the gas discha... | 07/19/2011 |
| 7977885 | High intensity discharge lamp having compliant seal In certain embodiments, a lamp is provided with an arc envelope including a ceramic, an end member including a material different from the ceramic, and a compliant seal disposed between the end member and the arc envelope. The compliant seal includes a plurality of ... | 07/12/2011 |
| 7977884 | High-pressure discharge lamp having cooling laminates fitted at the end of the discharge vessel Laminates, which are used for cooling the discharge vessel, are fitted to the seals of the ceramic discharge vessel. They are an integral part of the seal. ... | 07/12/2011 |
| 7973478 | Electrode rod holder in a high-pressure discharge lamp The invention relates to an improved electrode rod (1) holder with the aid of a metal tube piece 5 and a metal plate 6 connected in a fixed manner to the metal tube piece for a mercury ultra-high pressure discharge lamp. ... | 07/05/2011 |
| 7960915 | Cement for bonding an aluminum nitride arc tube body to a molybdenum electrode support, articles made therefrom, and methods for making same A cement for bonding an arc tube body made of an aluminum nitride sintered body and an electrode support made of molybdenum achieves high gas tightness in the obtainable arc tube without impairing the excellent translucency of the aluminum nitride sintered body. The... | 06/14/2011 |
| 7952282 | Brazing alloy and ceramic discharge lamp employing same There is described a brazing alloy having a first component comprising a source of molybdenum and a source of aluminum and a second component comprising boron, wherein a weight ratio of said second component to said first component is not greater than 1:20. The addi... | 05/31/2011 |
| 7911143 | Discharge lamp with a holding apparatus for the electrodes The invention relates to a discharge lamp, in particular a high-pressure discharge lamp, having a discharge vessel (1) which has two diametrically opposite necks (2, 3) into each of which a holding rod (5, 10) is fused at least in places, with a... | 03/22/2011 |
| 7898180 | High pressure discharge lamp A high pressure discharge lamp having a hermetically sealed portion on opposite sides of an arc tube made of quartz glass and in which a pair of opposed electrodes is located is improved so that electrode rod warping is prevented even when the lamp is repeatedly lit... | 03/01/2011 |
| 7898179 | Discharge lamp exhibiting reduced thermal stress and method of making such a lamp A lamp (100) comprises an outer envelope (120) having first and second electrical lead-ins (140, 160) sealed into a base (180) of the envelope (120). A ceramic arc tube (200) is operatively mounted within the envelope (12... | 03/01/2011 |
| 7888872 | Electric lamp An electric lamp includes a quartz-glass envelope having at least one sealed end, a thin foil including molybdenum at least partly embedded within said sealed end, a first current conductor connected to the foil extending interiorly of the envelope, and a second cur... | 02/15/2011 |
| 7884549 | Gas-discharge lamp A gas-discharge lamp (1) is described having an inner envelope (2) comprising a discharge vessel (3) and two tubular sections (6, 7) arranged on the discharge vessel, having two electrodes (4, 5) that project from the tubular secti... | 02/08/2011 |
| 7880389 | LED lighting lamp The present invention is an LED lighting lamp which comprises a lamp body including a light emitting part in which a plurality of LED elements are arranged on each of side surfaces of a polygonal supporting member and a connection part which is provided at a differe... | 02/01/2011 |
| 7876051 | Electrode mount, arc tube, low-pressure mercury vapor discharge lamp, compact self-ballasted fluorescent lamp and method of manufacturing the arc tube The electrode mount includes a filament coil, paired lead wires supporting the filament coil therebetween in a manner that the filament coil hangs across the lead wires; and bead glass retaining the paired leadwires. The arc tube includes an arc tube main body forme... | 01/25/2011 |
| 7868552 | Short arc lamp A short arc lamp comprises a body portion made from an insulating material and having a curved reflective surface, in which a concave discharge space is formed; a pair of cathode and anode disposed at a focal point of the reflective surface with a gap; a support mem... | 01/11/2011 |
| 7839089 | Hermetical lamp sealing techniques and lamp having uniquely sealed components A system and method for hermetically sealing a lamp. Certain embodiments of the lamp have an arc envelope having an open end and, also, an end structure diffusion bonded to the arc envelope at the open end. The end structure also has a dosing passageway extending in... | 11/23/2010 |
| 7825597 | Discharge lamp A discharge lamp has an electrode comprising a base portion having a base portion side flange portion, and a lid portion having a lid portion side flange portion. In a sealed space of the electrode, heat conductive member is enclosed. At time of lighting, the electr... | 11/02/2010 |
| 7764019 | Lamp and method of manufacturing a lamp A lamp includes an envelope of a vitreous composition, having a pinched part at least one end to form a seal isolating an interior of the envelope from the environment of the envelope, and an arrangement for conducting electrical current to the interior of the envel... | 07/27/2010 |
| 7759871 | High temperature seal for electric lamp An improved seal for an electric lamp is provided. An oxidation-resistant coating is provided on the current conductor where the outer lead joins the seal foil, preferably at the pinch seal. The coating is preferably a chromium layer covered by a chromium layer or a... | 07/20/2010 |
| 7755291 | Incandescent lamp that emits infrared light and a method of making the lamp An incandescent lamp that emits infrared light and a method of making the lamp includes a filament assembly inside a polycrystalline aluminum oxide (PCA) envelope, where the filament assembly preferably has a coiled tungsten filament, solid metal ends of tungsten or... | 07/13/2010 |
| 7745999 | Lamp which is closed on two sides The elongate bulb (1) of the lamp, which defines a longitudinal axis (A), is closed at opposite ends by sealing parts (6; 32), with in each case one cap being fitted at one end, the cap having an electrical contact element (13; 25) which is conn... | 06/29/2010 |
| 7745998 | Lighting unit A lighting unit of the present invention comprises a light guide board, a fluorescent discharge tube provided on a side surface of the light guide board, having an electrode portion at its end portion, a lead wire having a contact connected to the electrode portion ... | 06/29/2010 |
| 7719192 | Metal halide lamp with intermetal interface gradient The invention relates to a metal halide lamp comprising a ceramic discharge vessel (21), characterized in that a molybdenum leadthrough (11) is connected to a cermet stopper (15) via an intermetal interface gradient (20). ... | 05/18/2010 |
| 7687996 | Compound body and a process for the production of a mechanical connection A compound body has a first body part (15) made of glass and a mechanical connection (20, 60) which is melted on the first body part (15) and contains aluminum. ... | 03/30/2010 |
| 7667406 | Electrode for metal halide lamp with ceramic discharge vessel Metal halide lamp with ceramic discharge vessel (4), the discharge vessel having two ends (6) which are closed off by stoppers, and an electrically conductive leadthrough (9) being passed through this stopper (12), an electrode (15... | 02/23/2010 |
| 7656093 | Discharge lamp and metal foil for a discharge lamp An ultra high pressure mercury lamp having a light emitting part, a pair of electrodes; hermetically sealed portions; part of the electrodes and metal foils installed in the hermetically sealed portions and connected to the base parts of the electrodes; and outer le... | 02/02/2010 |
| 7629749 | Quartz metal halide lamp with improved structural and electrical properties The invention relates to a discharge lamp having and envelope and at least one pair of inner leads and at least one pair of outer leads corresponding thereto, at least one end of each lead disposed in the interior of the lamp, with a substantially planar foil betwee... | 12/08/2009 |
| 7619362 | Outer jacket leak detection method and ballast implementing the method A method of detecting a leak in an outer jacket of a metal halide lamp having an arc tube inside the outer jacket and operated by a ballast, where the ballast monitors an electrical characteristic of the lamp during start and detects a leak in the outer jacket when ... | 11/17/2009 |
| 7598676 | Discharge lamp A discharge lamp includes a coaxial waveguide for high-frequency electromagnetic wave transmission and a discharge tube for emitting light of discharge by plasma generated by electromagnetic waves. The coaxial waveguide includes an internal conductor and a pipe-shap... | 10/06/2009 |
| 7595592 | Discharge lamp and method of making same A discharge lamp can be configured to include a glass tube bulb; a pair of discharge electrodes arranged within the glass tube bulb; and metal foils enclosed within sealing portions at both axial ends of the glass tube bulb so as to connect the discharge electrodes ... | 09/29/2009 |
| 7521869 | Electric discharge lamp with halide resistant conductor An electric discharge lamp comprising: a light-transmissive ceramic discharge vessel (1); a first and a second current conductor (2,3) entering the discharge vessel (1)and each supporting an electrode (4,5) in the discharge vessel (1 | 04/21/2009 |
