Tungsten-halogen Cycle Lamp Patents (Class 313/579)
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Patent number: 6913503Abstract: A high pressure discharge lamp includes a quartz glass bulb and a pair of electrodes. Each electrode of the pair of electrodes is disposed so as to be opposite the other in the quartz glass bulb. The quartz glass bulb of the high pressure discharge lamp contains at least mercury and a halogen gas which are airtightly sealed in the quartz glass bulb. The partial pressure of oxygen (O) in the quartz glass bulb is about 2.5×10?3 Pa or less and the partial pressure of the halogen gas in the quartz glass bulb is in the range between about 1×10?6 ?mol/mm3 and 1×10?8 ?mol/mm3. The pair of electrodes contain potassium oxide in the range between about 20 ppm and 40 ppm.Type: GrantFiled: May 23, 2003Date of Patent: July 5, 2005Assignee: NEC Microwave Tube, Ltd.Inventors: Kazuhisa Nishida, Toshimoto Makino
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Patent number: 6879102Abstract: The invention relates to an incandescent lamp for motor vehicle headlights, having at least one incandescent filament (2) arranged inside the lamp vessel, and a shading device (4). A coil exit (2a) of the incandescent filament (2) is joined to an edge section (41) of the shading device (4) running substantially parallel to the coil axis, in order to ensure an improved suspension of the incandescent filament (2).Type: GrantFiled: May 1, 2003Date of Patent: April 12, 2005Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventors: Gerhard Behr, Manfred Bühler, Christian Seichter, Klaus Wittmann
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Publication number: 20040239244Abstract: A 3-way halogen light bulb.Type: ApplicationFiled: May 27, 2003Publication date: December 2, 2004Inventor: Brian Brandes
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Publication number: 20040232836Abstract: A halogen lamp of a 12V type including: a glass part, a portion of which is a light emitting portion having a space therein and the rest of which is a sealing portion, both portions being made of quartz glass; an infrared reflective coating formed to cover an outer surface of the glass part; a filament which, supported by the sealing portion, is provided in the inner space of the light emitting portion; a molybdenum foil which is embedded in the sealing portion and is electrically connected to the filament; and a power supply line, one end of which is connected to the molybdenum foil, the other end exposed to outside. The halogen lamp satisfies 450 mm2≦Sb<650 mm2 and Se≧−0.35Sb+520, where Sb and Se designate outer surface areas of the light emitting portion and the sealing portion, respectively.Type: ApplicationFiled: February 25, 2004Publication date: November 25, 2004Inventors: Naotaka Hashimoto, Taku Ikeda, Ichiro Shibagaki, Ichiro Takeuchi
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Publication number: 20040201352Abstract: In a foil sealed lamp, a lamp container made of transparent material, has at least one sealing portion made of molybdenum wherein a metallic foil is buried, a light emitting section which is connected to one end of the metallic foil and a lead rod extending outward and connected to other end of the metallic foil, and wherein, in the sealing portion, a gap formed around a circumference portion of the lead rod is filled with sealing agent made of rubidium oxide or cesium oxide, and glass having boron oxide and bismuth oxide as principal components is coated on an outer end surface of the sealing portion so as to close the gap.Type: ApplicationFiled: April 14, 2004Publication date: October 14, 2004Inventors: Toshiyuki Okamoto, Yukiharu Tagawa
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Patent number: 6803721Abstract: The invention relates to a halogen incandescent lamp for operating on line voltage, at least comprising a hermetically sealed, cylindrical bulb (2) made from transparent material, a filling made from inert gas and a halogen additive, a luminous element (4), a current supply system, and a mount (5), which is formed from a single-piece support wire, one end region of which is bent away transversely to the lamp axis, and which retains the luminous element (4) in the vicinity of the end of the bulb (2) remote from the pinch, wherein a luminous element (4) bent virtually into a U-shape is arranged symmetrically relative to the lamp axis, the luminous element (4) is held twice by the mount (5) in the region of the portion of the luminous element (4) which is arranged transverse to the lamp axis, and one end of the mount (5) is fixed in a pinch (3).Type: GrantFiled: October 15, 2002Date of Patent: October 12, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Bernd Hofmann, Andreas Wever, Heinz-Josef Offermanns, Dieter Rosenbaum
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Patent number: 6784605Abstract: A halogen incandescent lamp comprises a light-transmitting envelope filled with a gas including a halogen gas and an inert gas. A pair of inner conductive wires is arranged in the envelope. A triple-coiled filament, which has a first coiling, a second coiling, and a third coiling having about 1.5 to about 4 turns, is re-crystallized, is arranged in the envelope, and is connected between ends of the inner conductive wires. The triple-coiled filament is held by a support member. The halogen incandescent lamp may be utilized to a lighting apparatus.Type: GrantFiled: March 29, 2001Date of Patent: August 31, 2004Assignee: Toshiba Lighting & Technology CorporationInventors: Makoto Sakai, Hideto Mochizuki, Makoto Bessho, Kazuhiro Ikejiri, Masayuki Takahashi
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Patent number: 6717339Abstract: The invention relates to a light bulb comprising a base BA to which a filament FIL is connected, which filament is intended to emit a luminous radiation and has turns arranged in spiraling fashion around an axis of revolution AX. According to the invention, the light bulb in addition comprises a plurality of hooks H1, H2, and H3, each being in contact with one of the turns of the filament, and being connected to the base BA by means of a support SUP. The invention enables to keep the filament FIL securely in position, which reduces the risk that several turns of said filament will come into contact with the support SUP, thus creating a destructive short-circuit.Type: GrantFiled: September 24, 2001Date of Patent: April 6, 2004Assignee: Koninklijke Philips Electronics N.V.Inventor: Jacky Paul Marchand
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Patent number: 6690102Abstract: The electric lamp has a light source (3) having a first (31) and a second light-generating portion (32) in a concave reflector (2). The reflector has an axis of symmetry (20) and a first (21) and a second reflector portion (22), each having an optical axis (23 and 24, respectively) which is parallel to the axis of symmetry (20). Each reflector portion (21, 22) surrounds its optical axis (23, 24) for the greater part. The light source portions (31, 32) each coincide with a respective one of the optical axes (23, 24). The lamp produces a light beam which has only one maximum.Type: GrantFiled: February 20, 2002Date of Patent: February 10, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Egbertus Johannes Petrus Maassen, Raoul Meerten, Cornelis Versluijs
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Patent number: 6686694Abstract: The present invention relates to a method for marking quartz glass lamps having at least one fusible metal foil 10, 12, which is surrounded by quartz glass, for supplying electric voltage to luminous means 15 arranged in the interior chamber of a lamp vessel, in which method the fusible metal foil 10, 12 is marked through the quartz glass by means of a laser. The invention also relates to a quartz glass lamp having at least one fusible metal foil 10, 12 which is surrounded by quartz glass, for supplying electric voltage to luminous means 15 arranged in the interior chamber of a lamp vessel, in which lamp the fusible metal foil 10, 12 forms a marking area 16, the marking of the marking area 16 taking place through the quartz glass by means of a laser.Type: GrantFiled: May 1, 2001Date of Patent: February 3, 2004Assignee: Patent Treuhand-Gesellschaft fuer e{overscore (l)}ektrische Gluehlampen mbHInventors: Johann Rechermann, Xaver Brems, Georg Rosenbauer
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Patent number: 6667573Abstract: A halogen incandescent lamp, in particular a miniature halogen incandescent lamp with an electrical power consumption of at most 10 W, that is suitable for use in a pocket lamp. The outside diameter of the lamp bulb is 3.0 mm to 6.2 mm, and the sections (4a, 5a) arranged in the interior (3) of the lamp bulb (1), of the supply leads (4, 5) for the incandescent filament (2) are constructed as flattened wires in order to minimize shading effects.Type: GrantFiled: April 19, 2002Date of Patent: December 23, 2003Assignee: Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbHInventors: Axel Bunk, Walter Ciupke, Guenter Kreis, Thomas Kass, Joachim Koziol, Rolf Minder
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Patent number: 6661177Abstract: 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 a series arrangement of a glow starter and an ohmic impedance. According to the invention, the ohmic impedance is formed by a halogen incandescent lamp.Type: GrantFiled: August 7, 2001Date of Patent: December 9, 2003Assignee: Koninklijke Philips Electronics N.V.Inventors: Gerardus Marinus Josephus Franciscus Luijks, Johan Leopold Victorina Hendrix
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Patent number: 6650042Abstract: A low-wattage fluorescent lamp is provided. The lamp has at least one mercury cold spot region effective to maintain the mercury in the lamp at less than 30° C., preferably 25° C., in an enclosed lamp fixture. The lamp also features a reduced distance between electrodes resulting in less power being required to sustain an electric arc discharge during operation of the lamp. The lower power electric arc generates less heat to raise the temperature of mercury vapor within the lamp.Type: GrantFiled: April 26, 2001Date of Patent: November 18, 2003Assignee: General Electric CompanyInventor: Edward E. Hammer
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Patent number: 6630770Abstract: A light source bulb in an automotive headlamp having a lamp chamber defined by a lamp housing and a lens, where the lamp chamber includes a reflector and the light source bulb arranged therein. The reflector includes a reflecting surface constituted by a complex reflecting surface. The light source bulb includes a high-beam filament arranged obliquely below and behind with respect to a low-beam filament. When lit, high and low beam distribution patterns are formed by entire-surface reflection light distribution control of the reflecting surface. The light source bulb is used for right traffic and for left traffic. A second support wire is, in a side view of said light source bulb, bent to rearward of the rear end of said high-beam filament and positioned above the lower end of said low-beam filament.Type: GrantFiled: November 18, 1999Date of Patent: October 7, 2003Assignee: Ichikoh Industries, Ltd.Inventor: Yasuhiro Okubo
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Patent number: 6624577Abstract: A tungsten-rhenium filament for an operation temperature between 2900 and 3200° K is disclosed. The filament comprises an aluminum-potassium-silicon (AKS) additive. The filament has a grain microstructure comprising substantially exclusively elongated interlocking grains with a Grain Aspect Ratio (GAR) not less than 12. The rhenium content of the filament is between 0.2-0.4% by weight. A method for manufacturing a rhenium-tungsten filament is also disclosed. The method comprises the following steps. An AKS doped tungsten-rhenium alloy powder is prepared with a rhenium content of 0.2-0.4% by weight. The alloy powder is pressed and presintered, and thereafter sintered with direct current. A rhenium-tungsten filament is formed, which has a metastable crystal structure. The filament is annealed below the recrystallisation temperature, and recrystallised above the crystallization temperature. There is also provided a halogen incandescent lamp with a glass envelope enclosing a tungsten-rhenium filament.Type: GrantFiled: March 19, 2001Date of Patent: September 23, 2003Assignee: General Electric CompanyInventors: István Mészáros, Tamás Gál, György Nagy, Béla Szeles
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Patent number: 6611102Abstract: The present invention provides a tungsten-halogen light bulb having an arc tube with a seal portion at one end. A filament is provided in the interior of the arc tube, and a basic gas mainly comprising at least either gaseous xenon or gaseous krypton is filled in the arc tube. When V (V) denotes a rated voltage of the tungsten-halogen light bulb, P(MPa) denotes a filling pressure of the basic gas at a room temperature, and Xe vol. % and Kr vol. % respectively denote composition ratios of the gaseous xenon and of the gaseous krypton, the following formulas (1) and (2) are satisfied simultaneously, in which ‘%’ means ‘volume %’. V≧100 (Volt) (1) P≧0.7+{0.1×(Kr%/(Kr%+Xe%))} (2) In these formulas, Kr %+Xe %=100(%), 0≦Kr %≦100, and 0≦Xe %≦100. Accordingly, a crack at the seal portion of the arc tube is prevented and the lifetime is improved.Type: GrantFiled: March 2, 2001Date of Patent: August 26, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mituhiko Kimoto, Taku Ikeda, Hiroshi Sugimoto, Takeshi Fujikawa
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Patent number: 6608440Abstract: A high pressure discharge lamp includes a quartz glass bulb and a pair of electrodes. Each electrode of the pair of electrodes is disposed so as to be opposite the other in the quartz glass bulb. The quartz glass bulb of the high pressure discharge lamp contains at least mercury and a halogen gas which are airtightly sealed in the quartz glass bulb. The partial pressure of oxygen (O) in the quartz glass bulb is about 2.5×10−3 Pa or less and the partial pressure of the halogen gas in the quartz glass bulb is in the range between about 1×10−6 &mgr;mol/mm3 and 1×10−8 &mgr;mol/mm3. The pair of electrodes contain potassium oxide in the range between about 20 ppm and 40 ppm.Type: GrantFiled: July 5, 2001Date of Patent: August 19, 2003Assignee: NEC Microwave Tube, Ltd.Inventors: Kazuhisa Nishida, Toshimoto Makino
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Publication number: 20030127980Abstract: The invention relates to a halogen incandescent lamp for operating on line voltage, at least comprising a hermetically sealed, cylindrical bulb (2) made from transparent material, a filling made from inert gas and a halogen additive, a luminous element (4), a current supply system, and a mount (5), which is formed from a single-piece support wire, one end region of which is bent away transversely to the lamp axis, and which retains the luminous element (4) in the vicinity of the end of the bulb (2) remote from the pinch, wherein a luminous element (4) bent virtually into a U-shape is arranged symmetrically relative to the lamp axis, the luminous element (4) is held twice by the mount (5) in the region of the portion of the luminous element (4) which is arranged transverse to the lamp axis, and one end of the mount (5) is fixed in a pinch (3).Type: ApplicationFiled: October 15, 2002Publication date: July 10, 2003Inventors: Bernd Hofmann, Andreas Wever, Heinz-Josef Offermanns, Dieter Rosenbaum
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Publication number: 20030127979Abstract: A single-ended tungsten halogen lamp having a spherical or ellipsoidal envelope and an infrared reflective coating is manufactured using a mandrel alignment tool that radially centers an axially-oriented tungsten filament within the envelope. The manufacturing method includes forming the envelope in a glass tube. A filament assembly having an axially-oriented coiled tungsten filament is then placed into the interior of the envelope and the mandrel alignment tool is utilized to center the filament radially within the spherical or ellipsoidal envelope. The tool includes a tip that is inserted into the center of the tungsten coil to maintain the radial position of the filament during sealing of the glass tube around the filament assembly. After removing the tool, the glass tube is necked down and an inert halogen gas is placed within the envelope. The tube is then tipped off and the infrared reflective coating applied to form a completed bulb.Type: ApplicationFiled: January 9, 2002Publication date: July 10, 2003Applicant: FEDERAL-MOGUL WORLD WIDE, INC.Inventor: Ernest C. Weyhrauch
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Patent number: 6577065Abstract: An electric lamp is provided which includes a sealed thin-walled outer envelope containing a fill gas having a high thermal conductivity. A lamp capsule is contained within the outer envelope and is in series with an oxidizable fuse also contained within the outer envelope. The fill gas serves to reduce the temperature of the fuse during normal operation of the lamp thereby reducing the power loss in the fuse, increasing overall lamp efficacy and eliminating glow of the fuse. The lamp capsule is quickly extinguished if the outer envelope is broken and the fuse exposed to air. In one embodiment, an incandescent lamp is provided wherein the lamp capsule is a tungsten halogen capsule, the fuse is a tungsten coil wire and the fill gas is helium.Type: GrantFiled: September 26, 2001Date of Patent: June 10, 2003Assignee: Osram Sylvania Inc.Inventor: Michael R. Kling
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Patent number: 6559597Abstract: An incandescent light, which uses a rotating, liquefied filament. The rotating filament consists of a thin layer of filament metal deposited on the interior convex surface of a refractory filament mount, which is inside the torus. The filament device is designed to rotate at a speed sufficient to prevent the metal from boiling off from, or breaking away from, the refractory surface of the filament mount as it rotates. The rotational speed of the torus will create a centrifugal force greater than the thermal forces, which would otherwise destroy the molecular integrity of the filament metal. The temperature of the deposited filament metal will exceed its normal melting point as it rotates. As it becomes hotter it will luminesce more in exponential proportion to the current applied to the rotating torus filament assembly.Type: GrantFiled: August 13, 2001Date of Patent: May 6, 2003Assignee: The United States of America as represented by the Secretary of the Air ForceInventor: Jerome D. Friedman
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Publication number: 20020171360Abstract: The compact high-voltage incandescent lamp according to the invention has as a luminous element a threefold winding in the form of a double helix (4) which is formed, for its part, from a coiled-coil filament (4a-4c). It is possible in this way to implement high-voltage incandescent lamps with compact dimensions and high luminances.Type: ApplicationFiled: April 9, 2002Publication date: November 21, 2002Inventors: Helmut Davideit, Sigbert Mueller
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Publication number: 20020163303Abstract: A halogen incandescent lamp, in particular a miniature halogen incandescent lamp with an electrical power consumption of at most 10 W, that is suitable for use in a pocket lamp. The outside diameter of the lamp bulb is 3.0 mm to 6.2 mm, and the sections (4a, 5a) arranged in the interior (3) of the lamp bulb (1), of the supply leads (4, 5) for the incandescent filament (2) are constructed as flattened wires in order to minimize shading effects.Type: ApplicationFiled: April 19, 2002Publication date: November 7, 2002Applicant: Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbHInventors: Axel Bunk, Walter Ciupke, Guenter Kreis, Thomas Kass, Joachim Koziol, Rolf Minder
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Patent number: 6472641Abstract: There is provided a lamp unit for light radiating type heating device which allows efficient cooling of the lamps, and the temperature increase of a semiconductor wafer irradiated with the lamp unit is faster than in the prior art without the need of a complicated and large cooling structure.Type: GrantFiled: December 29, 2000Date of Patent: October 29, 2002Assignee: Ushiodenki Kabushiki KaishaInventor: Shinji Suzuki
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Patent number: 6462472Abstract: The present invention proposes a fixing structure for the safety fuse of a Christmas lamp. The Christmas lamp of the present invention has two conductive filaments installed at two sides in a lamp casing. A fixing block is installed in the casing to fix the positions of the two conductive filaments. A tungsten filament is connected between the top ends of the two conductive filaments. The potion of the two conductive filaments between the tungsten filament and the fixing block is bent to form a fixing structure. A small section of safety fuse is exactly fixed on the two conductive filaments through the help of the fixing structure. Thereby good conductivity can be maintained, and material of safety fuse can be saved.Type: GrantFiled: April 12, 2000Date of Patent: October 8, 2002Inventors: Chen Hsien Huang, Kuo Chih Tseng
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Publication number: 20020135302Abstract: A halogen incandescent lamp comprises a light-transmitting envelope filled with a gas including a halogen gas and an inert gas. A pair of inner conductive wires is arranged in the envelope. A triple-coiled filament, which has a first coiling, a second coiling, and a third coiling having about 1.5 to about 4 turns, is re-crystallized, is arranged in the envelope, and is connected between ends of the inner conductive wires. The triple-coiled filament is held by a support member. The halogen incandescent lamp may be utilized to a lighting apparatus.Type: ApplicationFiled: March 29, 2001Publication date: September 26, 2002Inventors: Makoto Sakai, Hideto Mochizuki, Makoto Bessho, Kazuhiro Ikejiri, Masayuki Tahakashi
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Patent number: 6384530Abstract: Tungsten-halogen lamps capable of satisfactory operation at relatively high temperatures exceeding 250° C. which comprise a high temperature glass or quartz envelope enclosing a tungsten filament and molybdenum, contain a fill comprising a mixture of noble gas, hydrogen, phosphorus, chlorine, and bromine. In a preferred embodiment the chlorine and bromine will be supplied by a single carbon atom hydrocarbon compound containing both halogens such as CHCl2Br and CH2BrCl.Type: GrantFiled: March 31, 1997Date of Patent: May 7, 2002Assignee: General Electric CompanyInventors: Thomas H. Yu, Richard H. Holcomb
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Patent number: 6373193Abstract: A long life, halogen cycle, incandescent lamp (30) for operation in excess of 85 volts. The lamp comprises a transparent glass envelope (34) having sealed therewithin a tungsten filament (45); a pair of electrical lead-ins (42, 44) connecting the filament and extending exteriorly of the envelope for connection to a supply voltage greater than 100 V; and a fill gas within the envelope, including a halogen, at a pressure of at least three atmospheres. The envelope is constructed of a five component alkaline earth aluminosilicate glass having a composition consisting essentially of, in weight percent from >58 to about 64% SiO2, from about 14 to about 17% Al2O3; from 0 to about 1% B2O3, from 1 to about 6% MgO, from about 6 to about 12% CaO, from about 7 to about 17% BaO and from 0 to about 1.5% ZrO2.Type: GrantFiled: March 8, 2000Date of Patent: April 16, 2002Assignees: Osram Sylvania Inc.Inventors: Richard C. Marlor, Karin Naumann, Franz Ott, Ottmar Becker
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Patent number: 6356016Abstract: The invention relates to a high-pressure metal-halide lamp comprising a discharge vessel with an ionizable filling containing Hg, a halide and a rare gas, which vessel includes electrodes with a rod containing substantially W. The lamp, when in operation, maintains a W-halide cycle in the discharge vessel. According to the invention, the discharge vessel contains an oxygen dispenser.Type: GrantFiled: April 2, 1999Date of Patent: March 12, 2002Assignee: U.S. Philips CorporationInventors: Joseph L. G. Suijker, Marinus C. Raas
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Patent number: 6280061Abstract: A halogen lamp with reflector which allows a pinch seal portion to be fitted onto a lamp mount portion of a reflector simply by inserting a lamp body with a pinch seal support and a lead rod support into the lamp mount portion, thrashes the cost and prevents an inorganic adhesive from contaminating a concave reflecting section of the reflector, and is suitable for achieving high wattage. An insulating lead rod support (5) is mounted to lead rods (1b), and a pinch seal support (4) is mounted to the pinch seal portion (1a). The lead rod support (5) is inserted into a bottom aperture (3b) of the lamp mount portion (3). The pinch seal support (4) includes an insertion hole (4d) for passing the pinch seal portion (1b) therethrough, pinch seal abutting pieces (4b), reflector abutting pieces (4a), and an opening closing portion (4c) closing the front opening (6). An adhesive (8) is injected into a gap between the pinch seal portion (1b) and the lamp mount portion (3).Type: GrantFiled: November 18, 1999Date of Patent: August 28, 2001Assignee: Phoenix Electric Co., Ltd.Inventor: Haruo Kokado
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Patent number: 6239550Abstract: A tungsten halogen lamp comprises an arc tube of fused quartz having a sealing portion at one end with a halogen element and a rare gas enclosed and a filament coil held within the arc tube, and an infrared reflecting film is formed on the surface of the arc tube. The sealing portion seals metal foils connected to the filament coil and outer leads having one end connected to the metal foils and the other end led out of the sealing portion. The infrared reflecting film is formed on the surfaces of the outer leads and the surfaces of the metal foils, and at least a part of the surface of the sealing portion has a portion where the infrared reflecting film is not formed or a portion where at least a part of the infrared reflecting film is removed. Therefore, the oxidation of the metal foils is prevented, and a tungsten halogen lamp that has a long life and a high efficiency and is inexpensive and a method for manufacturing the same are obtained.Type: GrantFiled: July 21, 1998Date of Patent: May 29, 2001Assignee: Matsushita Electronics CorporationInventor: Kazuo Maeda
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Patent number: 6133676Abstract: A halogen bulb is composed essentially of a tubular halogen bulb having two conductive ends, a thick hollow glass envelope and a socket for holding securely the tubular halogen bulb in the thick hollow glass envelope. The thick glass envelope has a thickness ranging between about 2 mm and about 8 mm, which is made integrally or made of two component parts joined together. The thick hollow glass envelope may be provided with protuberances perpendicular to an outer surface opposite to the socket, and/or ventilation holes to reduce the temperature of the double-enveloped halogen bulb at work. The socket may be provided with one or more ventilation holes at the closed end thereof. A bracket is used inside the thick hollow glass envelope for holding the tubular halogen bulb such that the tubular halogen bulb is perpendicular to the longitudinal axis of socket.Type: GrantFiled: May 15, 1998Date of Patent: October 17, 2000Inventor: Chun Tsun Chen
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Patent number: 5949181Abstract: An automotive lamp bulb is provided that is easy to assemble. A glass bulb has a tip with a short projection at its upper end. A common lead wire is secured in a neck portion of the glass bulb with the aid of a bead. The bead makes it possible to shorten the upper end of the glass bulb. The use of the bead also makes it easier to align the common lead wire with the neck portion. Because the bead is interposed therebetween, the common lead wire is allowed to slide in relation to the glass bulb, thus making it possible to use inexpensive hard glass. Consequently, an inexpensive and compact automotive lamp bulb can be easily manufactured.Type: GrantFiled: June 4, 1997Date of Patent: September 7, 1999Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Hajime Tabata, Toru Hasegawa
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Patent number: 5910707Abstract: A glass halogen lamp which exhibits improved short wavelength light transmission and emission having a glass envelope which is made of a glass composition of the aluminosilicate system in which the iron content of the composition is between 10 and 100 ppm. The glass envelope of the lamp may optionally contain an area of reduced wall thickness which further enhances short wavelength light transmission and emission.Type: GrantFiled: June 25, 1997Date of Patent: June 8, 1999Assignee: Welch Allyn, Inc.Inventor: Dean A. Bell
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Patent number: 5896007Abstract: An incandescent halogen lamp is operated under convection-free conditions. In this way, light yields of about 15 to 20 lm/W with service lives of about 2000 hours can be attained. The important parameters are the bulb dimensions, luminous element dimensions, and fill gas properties.Type: GrantFiled: June 13, 1996Date of Patent: April 20, 1999Assignee: Patent Treuhand Gesellschaft Fur Elektrische Gluehlampen MBHInventors: Peter Dobiasch, Rolf Minder, Karlheinz Vogl
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Patent number: 5886466Abstract: A miniature two-pin, tungsten-halogen lamp in the shape of a cylindrical envelope formed of high temperature glass having a sealed chamber capable of withstanding internal pressures of between 5 and 20 atmospheres. The diameter of the cylindrical envelope is in the range of 0.250 to 0.313 inches and contains at least one refractory metal filament mounted within the sealed chamber. The metal filament is electrically connected to a pair of leads passing out of the envelope. A fill gas is contained within the sealed chamber and contains an inert gas major constituent and a halide gas minor constituent. The lamp produces an efficacy of up to 26 lumens per watt when operating within a range of from 1.25 to 18 watts.Type: GrantFiled: January 8, 1997Date of Patent: March 23, 1999Assignee: Welch Allyn, Inc.Inventors: Dean A. Bell, Raymond Alan Dean
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Patent number: 5883469Abstract: Halogen bulb without additional safety device for high-volt/intermediate-t operation with a bulb pinched on one side produces an inherent safety effect by producing a current lead segment that is pinched from an uncoiled wire with a diameter of 130 .mu.m at most and the distance between the two current leads is suitably selected.Type: GrantFiled: April 18, 1997Date of Patent: March 16, 1999Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventors: Thomas Noll, Roland Stark, Josef Bauer
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Patent number: 5883468Abstract: A long life, two filament tungsten halogen lamp having light transmissive envelope, a first filament with a first lead, second lead, filament coil; a second similar filament, and a fill material is disclosed. The filament coil has an increased wire weight, increased over what is commonly used. The fill material comprises a halogen for the tungsten halogen cycle, a getter, and the remainder is approximately equal portions of krypton and xenon. The basic life improvement comes from the heavier tungsten wire weight, combined with the heavier molecular weight of xenon and krypton. The new filament and fill gives a two filament tungsten halogen lamp yielding substantially longer lamp life.Type: GrantFiled: July 24, 1997Date of Patent: March 16, 1999Assignee: Osram Sylvania Inc.Inventors: Bonnie J. Hobbs, Paul A. Young, Stuart K. Denham
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Patent number: 5821678Abstract: An electric incandescent lamp has a filament having two incandescent portions interconnected by an intermediate non-lightemitting conductor. The filament is accommodated in a single ended, pinchsealed tubular glass envelope and is supported therein in that the intermediate conductor is embedded in an inner portion of a second pinch seal. The lamp has means to lower the temperature of the intermediate conductor and thereby of the second pinch, if the maximum permissible temperature of the latter would otherwise be exceeded.Type: GrantFiled: September 3, 1996Date of Patent: October 13, 1998Assignee: U. S. Philips CorporationInventor: Jean-Pierre A. Michel
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Patent number: 5811934Abstract: An electric incandescent lamp (4), in particular an incandescent halogen p, has a bulb or envelope (5), which is shaped as an ellipsoid or optionally ellipsoidlike (barrel-shaped body) and provided with an IR layer (8). Located inside the bulb (5) axially is a compact filament (2') of circular-cylindrical outer contour; the focal lines of the ellipsoid-like barrel-shaped body each coincide approximately with the last luminous winding on the two ends of the filament. This improves lamp efficiency. The compact filament is preferably in the form of a helical coil (2'), whose power supply lead (10b) remote from the seal is returned to inside the helical coil (2'), or is shaped like a double helix.Type: GrantFiled: November 25, 1996Date of Patent: September 22, 1998Assignee: Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbHInventors: Axel Bunk, Andreas Hollstein, Ulrich Binder
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Patent number: 5760543Abstract: The invention concerns an electrical incandescent lamp with a mount for hing a filament coil (4), whereby the coil is suspended by at least one hook-shaped holder (7) provided with a free end, in which filament coil (4) is suspended. Free end (7a) of hook-shaped holder (7) is bent in such a way that it (7a) constricts the suspension opening of hook-shaped holder (7). In this way, an unhooking of the coil is avoided when vibrations occur.Type: GrantFiled: July 19, 1996Date of Patent: June 2, 1998Assignee: Patent-Treuhand-Gesellschaft fur elektrische Gluehlampen mbHInventor: Hermann Gmeiner
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Patent number: 5719468Abstract: An incandescent lamp has an envelope including a cylindrical portion and two hemispherical portions. Each hemispherical portion includes a second order curve which has a focus and is connected at one end of the cylindrical portion, respectively. A filament is provided along the central axis of the envelope and is located within and extends beyond a space surrounded by the cylindrical portion. An optical interference layer is arranged on a surface of the envelope to reflect infrared rays and transmit visible rays.Type: GrantFiled: March 29, 1996Date of Patent: February 17, 1998Assignee: Toshiba Lighting Technology CorporationInventors: Hiroyoshi Takanishi, Kazunari Fukue, Tsutomu Watanabe, Hiroshi Kamata, Akira Kawakatsu
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Patent number: 5686794Abstract: To positively locate a filament (5, 22) in position within a bulb (2) of a halogen incandescent lamp, the walls of the bulb are deformed at selected points along the length of the filament within the bulb to define at least three inwardly projecting dimples which just barely engage, or engage, the filament. Preferably, the filament is formed with a connecting portion (7) in the region of engagement, which connecting portion is either straight, coiled with a very steep pitch, or, if the filament is double-coiled, only single-coiled. The connecting portion (7) may be electrically short-circuited by a core pin (39). If the bulb is single-ended (FIG. 3), a return lead (29) along the wall of the bulb, can be pinched between adjacent walls (45) of adjacent dimples. The dimples, looked at from the outside of the lamp, are essentially funnel-shaped and, in cross section, may be circular, or if space between adjacent dimples is insufficient, may be elliptical.Type: GrantFiled: June 5, 1996Date of Patent: November 11, 1997Assignee: Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen mbHInventors: Hans-Juergen Streppel, Hans Liermann, Juergen Eder
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Patent number: 5680003Abstract: An improved coiled-coil filament for use in an incandescent lamp has a primary coil winding with a substantially uniform spacing between successive coil turns. The primary coil winding is wound around a second mandrel in a manner to provide a main coil body and leg portions extending therefrom. A helical bend is formed between the main coil body and the leg portions thereby allowing that the leg portions extend toward a seal region of the lamp envelope in a substantially parallel relation to each other. Once the main coil body has been set in shape, the first and second mandrels are removed such that the leg portions are disposed in the seal region of the lamp envelope in a spaceless, and optional spudless manner.Type: GrantFiled: May 19, 1995Date of Patent: October 21, 1997Assignee: General Electric CompanyInventors: Robert W. Hartwick, Robert J. Kellner, Joseph P. Lagermasini, III, Bernard W. Rachel
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Patent number: 5565734Abstract: The electric incandescent lamp has a filament (2) centrically supported in a tubular envelope (1) by constrictions (6) in the envelope at areas where a refractory metal member (7) short-circuits turns (3') of the filament. The refractory metal member (7) is a sleeve around the filament (2).Type: GrantFiled: March 14, 1994Date of Patent: October 15, 1996Assignee: U.S. Philips CorporationInventor: Gervais Pinot
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Patent number: 5473226Abstract: An incandescent lamp having an envelope of hardglass. The envelope encloses a tungsten filament and contains a fill material including an inert fill gas and a halogen additive. A coating of silicon dioxide (i.e., silica) is disposed on a substantial portion of the internal surface of the envelope. The silicon dioxide coating prevents the halogen additive from combining with alkaline ions of the hardglass envelope.Type: GrantFiled: November 16, 1993Date of Patent: December 5, 1995Assignee: Osram Sylvania Inc.Inventors: Mark D. Beschle, Erich J. Bockley, Peter R. Gagnon, Robert M. Griffin
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Patent number: 5359262Abstract: A low wattage sub-miniature, tungsten-halogen lamp having high efficacy and long life. The lamp has a cylindrical envelope in the T-1 to T-11/4 range containing a fill gas having a halogen minor constituent and an inert gas major constituent. The lamp operates at high fill gas pressures, and lower halogen gas content.Type: GrantFiled: August 31, 1992Date of Patent: October 25, 1994Assignee: Welch Allyn, Inc.Inventors: Dean A. Bell, John W. Harkins
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Patent number: 5336969Abstract: To reduce the transmissivity of glass, and particularly quartz glass, espally highly thermally loaded quartz glass of discharge lamps or halogen incandescent lamps, a coating or glaze is applied to the bulb and adjacent regions which includes, as an ultraviolet light absorption, a glaze of a mixture of cerium fluoride (CeF.sub.3) and aluminum trioxide (Al.sub.2 O.sub.3) and silicon dioxide (SiO.sub.2), in a relationship, by weight, of about 3:1, preferably about 2:1. The weight relationship of Al.sub.2 O.sub.3 to SiO.sub.2 in the mixture is about 1.7:1. The mixture can be applied in form of an alcohol or alcohol-like suspension, after grinding to a grain size of less than 300 mesh, by spraying, dripping on, painting or the like, subsequent drying for 10 seconds, and firing in a hydrogen/oxygen flame or in an ordinary gas flame for about 2 seconds, while axially rotating the lamp bulb.Type: GrantFiled: June 9, 1992Date of Patent: August 9, 1994Assignee: patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen mbHInventors: Werner Weiss, Manfred Deisenhofer
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Patent number: 5239231Abstract: A connector for connecting the filaments of a dual filament halogen lamp to a common ground lead includes two provisions for clamping the connector to ends of the first and second filament and a central portion for connection to the common ground in a dual filament halogen lamp.Type: GrantFiled: March 5, 1991Date of Patent: August 24, 1993Assignee: Cooper Industries, Inc.Inventor: Robert A. Grunder
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Patent number: 5218261Abstract: To reliably secure a sealed light source bulb element (1a), for example a logen incandescent lamp, to a standard screw-in base, for example an Edison E14 base, while surrounding the sealed bulb element (1a) with an outer bulb, a support carrier (8, 8'), for example of nickel-plated steel wire, is bent into essentially ring shape and seated on a ring seating surface (9) formed on a base sleeve which carries the Edison thread. The outer bulb (2) is formed with an extending neck (2a) cemented into a cylindrical extension from the base, leaving a small gap from the seating surface to define a groove within which the ring-shaped portion of the support carrier is located. The support carrier ends in a bent-away portion, bent out of the major plane of the ring-shaped portion of the support carrier, into engaging position with one (5) of two current supply leads (4, 5) which extend from the sealed light source bulb element, and is spot-welded to that lead.Type: GrantFiled: January 21, 1992Date of Patent: June 8, 1993Assignee: Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen mbHInventor: Roland Stark