Envelope With Internal Temperature Modifying Baffle Patents (Class 313/33)
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Patent number: 10957511Abstract: An electron source capable of suppressing consumption of an electron emission material is provide. The present invention provides an electron source including: an electron emission material; and, an electron emission-suppressing material covering a side surface of the electron emission material, wherein a work function of the electron emission-suppressing material is higher than that of the electron emission material, and a thermal emissivity of the electron emission-suppressing material is lower than that of the electron emission material.Type: GrantFiled: December 9, 2019Date of Patent: March 23, 2021Assignee: Denka Company LimitedInventors: Toshiyuki Morishita, Hiromitsu Chatani, Shimpei Hirokawa, Toshiyuki Ibayashi, Isao Sugimoto
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Patent number: 10806018Abstract: An apparatus is provided for generating accelerated electrons, including a housing; an inlet for supplying a working gas; at least one first cathode; and at least one first anode, between which a corona discharge plasma can be generated. Ions from the corona discharge plasma can be accelerated onto the surface of a second cathode. Electrons emitted by the second cathode can be accelerated in the direction of the electron exit window by means of a second electric voltage applied between the second cathode and a second anode. The housing, the second cathode, and the electron exit window are ring-shaped. The ring-shaped space is divided into ring segments. Each ring segment has at least one wire-shaped electrode, which extends through the ring segment. At least one separate power supply device is associated with each ring segment, by means of which the strength of the electrical current is adjustable.Type: GrantFiled: March 2, 2018Date of Patent: October 13, 2020Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: André Weidauer, Frank-Holm Rögner, Gösta Mattausch, Ralf Blüthner, Ignacio Gabriel Vicente Gabas, Jörg Kubusch
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Patent number: 8981628Abstract: The present invention provides an ultra violet irradiating device for aligning liquid crystal and also an water-cooling coaxial tube. The ultraviolet irradiating device includes a water-cooling coaxial tube configured with an inter tube and an external pipe enveloping the internal pipe. A light tube is disposed within the internal pipe, and an infrared filter layer is disposed between the internal and external pipes; and an ultra violet filter layer is coated over an external surface of the external pipe so as to filter out an ultra violet light beam having wavelength lower than 320 nm. The breakage of the unit filters resulted from inter pushing with each other or leakage resulted from overlapping of the unit filters can be readily resolved.Type: GrantFiled: June 28, 2013Date of Patent: March 17, 2015Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventors: Chonghui Yin, Wen-pin Chiang
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Patent number: 8878422Abstract: Device for producing an electron beam includes a housing, which delimits a space that is evacuatable and has an electron beam outlet opening; an inlet structured and arranged for feeding process gas into the space; and a planar cathode and an anode, which are arranged in the space, and between which, a glow discharge plasma is producible by an applied electrical voltage. Ions are accelerateable from the glow discharge plasma onto a surface of the cathode and electrons emitted by the cathode are accelerateable into the glow discharge plasma. The cathode includes a first part made of a first material at least on an emission side, which forms a centrally arranged first surface region of the cathode, and a second part made of a second material, which forms a second surface region of the cathode that encloses the first surface region.Type: GrantFiled: September 8, 2011Date of Patent: November 4, 2014Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.Inventors: Goesta Mattausch, Peter Feinaeugle, Volker Kirchhoff, Dieter Weiske, Henrik Flaske, Rainer Zeibe
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Patent number: 8690384Abstract: A light assembly (20) for mounting to a planar support includes an extruded heat sink (22) presenting a mounting surface (24) and a heat transfer surface (26) slanted from an upper border (32) to a lower border (30). A panel block (52) depends from the lower border (30), a lens block (68) depends from the upper border (32), a back side (76) extends downwardly from the lens block (60), a truss member (82) interconnects the back side (76) and the heat transfer surface (26), and a mounting block (84) extends from the back side (76). The extruded heat sink (22) is cut into independent elongated sections (28) and light emitting diodes (44) are disposed thereon. The elongated sections (28) are mitered to one another to define a frame. A light directing panel (56) extends from the panel blocks (52) and a lens sheet (72) extends from the lens blocks (68).Type: GrantFiled: June 4, 2009Date of Patent: April 8, 2014Assignee: Relume Technologies, Inc.Inventor: Peter A. Hochstein
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Publication number: 20130162134Abstract: The invention relates to a device for producing an electron beam, comprising a housing (12), which delimits a space (13) that can be evacuated and has an electron beam outlet opening; an inlet (16) for feeding a process gas into the space (13) that can be evacuated; a planar cathode (14) and an anode (15), which are arranged in the space (13) that can be evacuated and between which a glow-discharge plasma can be produced by means of an applied electrical voltage, wherein ions can be accelerated from the glow-discharge plasma onto the surface of the cathode (14). The cathode has a first part (14a) made of a first material, which forms a centrally arranged first surface region of the cathode (14), and a second part (14b) made of a second material, which forms a second surface region of the cathode (14) that encloses the first surface region.Type: ApplicationFiled: September 8, 2011Publication date: June 27, 2013Inventors: Goesta Mattausch, Peter Feinaeugle, Volker Kirchhoff, Dieter Weiske, Henrik Flaske, Rainer Zeibe
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Patent number: 8467187Abstract: A flat-panel display apparatus comprises a display panel, a circuit board, and a cover. The circuit board includes a first and second circuit boards. The first circuit board is arranged above the second circuit board so that, on the back side of the display panel, a mounting surfaces of the first and second circuit boards are approximately in parallel with a display surface of the display panel and do not overlap each other. Each of the first and second circuit boards have a primary mounting surface on which a large number of electrical components are mounted, and a secondary mounting surface that is opposite the primary mounting surface. The primary mounting surface of the first circuit board is arranged in an inverted orientation to the primary mounting surface of the second circuit board. A radiator with fins is provided on the secondary mounting surface side of the first circuit board.Type: GrantFiled: December 23, 2009Date of Patent: June 18, 2013Assignee: Canon Kabushiki KaishaInventors: Toshiaki Itazawa, Kunio Sakurai, Kiyoshi Kumagai
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Publication number: 20110316406Abstract: A High Intensity Discharge lamp and method of making same having an arc tube defining a discharge chamber with opposite ends of the tube each receiving an electrode extending into the discharge chamber and define an axial gap therebetween. A thermal shield extends from each opposite end of the arc tube and defines a radial gap with the tube. The thermal shields in some embodiments extend from end plugs in the arc tube; and, in another embodiment use formed, integrally with one arc tube sections and the tube sections joined.Type: ApplicationFiled: June 25, 2010Publication date: December 29, 2011Inventors: Agoston Boroczki, Istvan Csanyi, Christopher E. Omalley, Attila Agod, Venkata Subbaiah Chennamshetty, Shanmugam Venkatachalam Ravi, Guy Henry Turner
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Patent number: 8053959Abstract: A light-emitting diode (LED) lamp device includes at least one light-emitting module and a heat-dissipation module. The heat-dissipation module includes a plurality of cooling fins arranged in a radial pattern and connected annularly at intervals around the light-emitting module. Each of the cooling fins has an outer rim folded back a predetermined distance toward the light-emitting module to form a bent edge. The bent edges are formed with arcuate folded-back portions so that the cooling fins have rib-like outer perimeters after the bent edges are formed. Thus, the LED lamp device is allowed to be held safely by the folded-back portions while the cooling fins are structurally strengthened.Type: GrantFiled: February 2, 2009Date of Patent: November 8, 2011Assignees: Fin-Core Corp, Color Stars, IncInventor: Cheng Hsiung Lai
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Patent number: 8004168Abstract: A light assembly includes a bulb connected to the passage defined through the base and the base includes a plurality of first slots defined transversely in an outer periphery of the base. A base cover has a space for receiving the base and multiple ventilation holes are defined through a wall of the base cover. A plurality of engaging pieces extend from an inner periphery of the base cover and are engaged with the first slots of the base. The heat generated from the bulb escaped via the ventilation holes.Type: GrantFiled: January 14, 2009Date of Patent: August 23, 2011Inventor: Tung-Hsiung Lin
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Patent number: 7969074Abstract: The invention relates to a mercury-free low pressure discharge lamp with a discharge vessel having an ionizable filling. The surface temperature of the discharge vessel, and thus the temperature of the ionizable filling, can be adjusted at least in some sections such that an emitting substance can produce the radiation required for the excitation of the luminescent substance. The temperature of the fluid is preferably adjusted in a temperature control circuit, using a temperature sensor, a pump and a heating device.Type: GrantFiled: October 10, 2007Date of Patent: June 28, 2011Assignee: OSRAM Gesellschaft mit beschränkter HaftungInventors: Klaus Stockwald, Herbert Weiβ
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Patent number: 7759850Abstract: A discharge tube arrangement for a compact fluorescent lamp is provided. The tube forms a continuous arc path and has electrodes disposed at each end of the arc path. The discharge tube arrangement comprises a first cold chamber in order to control and maintain a required mercury vapor pressure. The first cold chamber is located in a longitudinal end portion of the tube arrangement. The discharge tube arrangement is further provided with at least one second cold chamber, which is positioned between the longitudinal end portions of the discharge tube arrangement. The at least one second cold chamber is positioned on the wall of the tube, and has a cold chamber wall protruding substantially away from the central axis of the discharge tube arrangement. The discharge tube arrangement may have a coiled configuration with helical tube portions or a multifinger configuration with straight tube members.Type: GrantFiled: April 1, 2008Date of Patent: July 20, 2010Assignee: General Electric CompanInventors: Erzsébet Cserteg, Károly Tálosi, Arni Siti, Zhifu Liu, Gábor Schmidt, János Orbán, Tímea Seszták
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Patent number: 7619350Abstract: An arc discharge lamp (10) has a lamp envelope (12) and an arc discharge vessel (14) mounted within the envelope (12). An arc centering structure (60) is positioned within the arc discharge vessel for substantially centering the arc. The centering structure (60) is preferably fixedly mounted within the arc discharge vessel (14) and preferably comprises a metal annulus (62) that incandesces during lamp operation and adds to the light output of the lamp. In a preferred embodiment, the lamp is suitable for vertical or horizontal operation.Type: GrantFiled: August 29, 2006Date of Patent: November 17, 2009Assignee: Osram Sylvania Inc.Inventors: Lori R. Brock, Warren P. Moskowitz
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Publication number: 20090256460Abstract: A lamp and method for the reduction of gas loss in a high temperature lamp includes providing a light source and a surrounding shroud, using a fill gas outside of the light source and inside the shroud having a thermal conductance greater than nitrogen, and modifying the shroud so that it contains at least 20% of the initial fill gas for at least the rated life of lamp operation. The shroud is preferably modified by one or more of selecting the shroud material, controlling the thickness of the shroud, providing a coating on the shroud, and the selection of the fill gas.Type: ApplicationFiled: April 14, 2008Publication date: October 15, 2009Inventors: Gary Robert Allen, Rajasingh Schwartz Israel, Elizabeth Anne Guzowski, Rocco Thomas Giordano, Peter W. Brown, Deeder Aurongzeb
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Patent number: 7589459Abstract: A thermal filter is provided within a vehicle lamp assembly for reducing thermal radiation from reaching selected portions of the lamp assembly from an illumination light source disposed within the vehicle lamp. The thermal filter includes an inner envelope and an outer envelope in spaced relation to the inner envelope. The inner envelope and the outer envelope define a closed chamber therebetween. The closed chamber being disposed between the illumination light source and the selected portions of the lamp assembly. The inner envelope includes an interior portion. A thermal radiation absorbing agent disposed within the closed chamber. The thermal radiation absorbing agent receives radiation emitted from the illumination source. The thermal radiation absorbing agent is transparent to short wave visible radiation and is substantially opaque to long wave infrared radiation. A substantial portion of the long wave infrared radiation absorbed by the absorbing agent is retained within the closed chamber.Type: GrantFiled: December 7, 2006Date of Patent: September 15, 2009Assignee: Automotive Components Holdings, LLCInventors: Muhammed Aqil Hamid, Charles Frederick Schweitzer, Nasir Mahmood
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Patent number: 7492079Abstract: A lamp (10) includes an envelope (12) having a body (14) with a light source capsule (16) contained therein and ending in a hollow base (18) that terminates in a conical end (20). A circuit board (22) is positioned within the hollow base (18) and includes a triangular portion (24) that is closely fitted within the conical end (20). A temperature sensitive, voltage reducing component (28a) is positioned near the apex (30) of the triangular portion (24).Type: GrantFiled: June 14, 2005Date of Patent: February 17, 2009Assignee: Osram Sylvania Inc.Inventors: Matthew B. Ballenger, Ernest C. Weyhrauch, George B. Kendrick
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Patent number: 7483093Abstract: A flat fluorescent lamp includes a first substrate, a second substrate, an external electrode, and a radiating member. The second substrate is combined with the first substrate to form a plurality of discharge spaces. The external electrode is formed on at least one surface of the first substrate and the second substrate, wherein the external electrode extends perpendicularly to the discharge spaces. The radiating member is formed on the external electrode and radiates heat generated from the external electrode. Therefore, the heat generated from the flat fluorescent lamp is radiated to outside the flat fluorescent lamp through the radiating member, reducing pinhole formation and generally improving luminance characteristics of the flat fluorescent lamp.Type: GrantFiled: August 18, 2006Date of Patent: January 27, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Yong-Woo Lee, Hea-Chun Lee, Jae-Sang Lee
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Patent number: 7468887Abstract: A plasma display device that diversifies heat dissipating paths of integrated circuit modules in a circuit board assembly, thereby enhancing heat dissipation of the integrated circuit modules. The plasma display device includes a plasma display panel, a chassis base on which the plasma display panel is attached and supported, integrated circuit modules that are mounted on the circuit board assembly on an opposite side of the chassis base to the plasma display panel, and heat sinks, each being attached to one side of each of the integrated circuit modules to dissipate heat therefrom. The heat sink is formed such that one end thereof extends to come in contact with the chassis base.Type: GrantFiled: May 17, 2005Date of Patent: December 23, 2008Assignee: Samsung SDI Co., Ltd.Inventors: Chan-Young Han, Seung-Il Ha
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Patent number: 7233493Abstract: A ductwork assembly can be used with an electronic device wherein the electronic device includes a fan and the ductwork assembly is configured to receive a heat transfer fluid from the fan. A disperser lies within the ductwork assembly and is attached thereto in order to affect at least a portion of a flow of the heat transfer fluid. The ductwork assembly may also include a first channel and the first channel is characterized by a first average fluid velocity that is a highest average fluid velocity of all channels within the ductwork assembly. The ductwork assembly may include a second channel that is characterized by a second average fluid velocity that is a lowest average fluid velocity of all channels within the ductwork assembly. The second averaged fluid velocity may be no less than 90% of the first averaged fluid velocity.Type: GrantFiled: August 10, 2004Date of Patent: June 19, 2007Assignee: E. I. du Pont de Nemours and CompanyInventors: Jian Wang, Gang Yu
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Patent number: 7176641Abstract: A heat generating portion of a heater which is incorporated in an indirectly heated cathode structure of an electron gun for a cathode ray tube is formed by joining a first winding portion and a second winding portion which differ in the number of coil winding layers and by twisting and winding a joined body in a double helical structure. The present invention allows a cathode temperature to have a high temperature and hence, it is possible to enhance the electron irradiation characteristics even when a degree of in-tube vacuum is lowered.Type: GrantFiled: June 15, 2005Date of Patent: February 13, 2007Assignee: Hitachi Displays, Ltd.Inventors: Toshifumi Komiya, Sachio Koizumi
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Patent number: 6979940Abstract: An electrodeless discharge lamp includes an induction coil that includes a core and a winding wound around the core and generates an electromagnetic filed inside a bulb, an insert portion provided inside the core, and a plane portion that releases heat from the insert portion to the outside of a case. A tolerance in the inductance of the induction coil is reduced by spacing the end portion of the core on the side of the plane portion apart from the plane portion, which makes reliable start-up possible.Type: GrantFiled: May 23, 2003Date of Patent: December 27, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Toshiaki Kurachi, Kenji Itaya
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Patent number: 6924495Abstract: A heat controlled ultraviolet light apparatus includes a source of ultraviolet light, a cover, and a heating or cooling element that heats/cools the space or gap between the ultraviolet light source and the cover. Accordingly, the ultraviolet light source may be maintained at an optimal temperature thereby maximizing the efficiency of the ultraviolet light source in producing ultraviolet radiation. The apparatus may further include a temperature sensor and a control circuit to automatically control production of heat/cooling by the element based upon the ambient temperatures experienced by the ultraviolet light source during use. Methods are also provided for sanitizing heating and cooling coils of various devices such as an HVAC system, and cooling systems such as a refrigeration unit and an evaporative cooler.Type: GrantFiled: February 13, 2004Date of Patent: August 2, 2005Inventor: James Lawrence Brickley
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Patent number: 6897602Abstract: A flat luminescence lamp includes a first substrate having a first surface and a second surface, a second substrate having a first surface disposed facing opposite to the first surface of the first substrate, a first luminescence layer formed on the first surface of the first substrate, a second luminescence layer formed on the first surface of the second substrate, and a plurality of grooves formed on the second surface of the first substrate.Type: GrantFiled: June 29, 2001Date of Patent: May 24, 2005Assignees: LG.Philips LCD Co., Ltd., Sang Nong Enterprise Co., Ltd.Inventor: Suk Min Son
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Publication number: 20040135482Abstract: The present invention provides arrangements for electroluminescent displays 10 comprising a packaged semiconductor light emitting element 12 that has a light emitting display side 16. A heat sink 22 is disposed in the region of a rear side of the light-emitting element 12 opposite to the display side. Electrical connections 28 from the light emitting element 12 pass through said heat sink 22. Drive circuitry 30 for the light emitting element 12 is connected thereto by the electrical connections 28 and spaced apart from the heat sink 22 in such a manner that at least one cooling channel 34 is defined between the heat sink 22 and the drive circuitry 30 for the passage in use of a cooling fluid.Type: ApplicationFiled: October 8, 2003Publication date: July 15, 2004Inventors: Robbie Thielemans, Koen Ooghe, Steven De Keukeleire, Bruno Devos, Steve Veldeman, Tom Declerck, Karim Meersman, Kristof Vanluchene, Herbert Van Hille
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Patent number: 6727636Abstract: A headlight device includes a discharge lamp, a circuit unit and a heat radiating member. The circuit unit is directly connected to the discharge lamp to apply a high voltage to the discharge lamp. The heat radiating member radiates heat generated from the discharge lamp and the circuit unit. The heat radiating member is placed between the discharge lamp and the circuit unit and extends radially in a generally vertically downward direction.Type: GrantFiled: October 23, 2001Date of Patent: April 27, 2004Assignee: Denso CorporationInventor: Hironao Yamaguchi
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Publication number: 20020070643Abstract: A lamp is constructed to include a base adapted for connecting to an electric socket to obtain electricity, a shell fastened to the base and defining with the base an air-tight space, the shell having an inside wall coated with a layer of phosphorescent coating, an electronic ballast installed in the base and adapted to convert AC power supply into DC power supply, and at least one ultraviolet light emitting diode suspended in the air-tight space and connected to the electronic ballast and adapted to produce ultraviolet light to strike the phosphorescent coating in producing visible light upon connection of the base upon connection of the electronic ballast to power supply.Type: ApplicationFiled: December 13, 2000Publication date: June 13, 2002Inventor: Chao-Chin Yeh
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Patent number: 5898261Abstract: High fluence charged-particle beams are generated in a vacuum or near vacuum environment. To use these beams in an atmospheric pressure environment, they must pass through some form of transmission window between the two environments. To date, thin single metal foils have been used for these transmission windows. The total practical fluence of such transmitted beams is limited by the ability of the window to dissipate the excess heat deposited in it by the transiting beam. Existing windows have relied only on simple radial heat conduction through the thin foil, radiative cooling from the foil faces, and/or flowing cooling fluids on the high-pressure face of the foil. The present invention, however, proposes to enclose one or more channels within a double foil window and to flow a cooling fluid through such channel(s). The window cooling rate is thus significantly improved over air convection because of fully-developed turbulent flow and a higher cooling mass transport through such channels(s).Type: GrantFiled: January 31, 1996Date of Patent: April 27, 1999Assignee: The United States of America as represented by the Secretary of the Air ForceInventor: Robert J. Barker
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Patent number: 5726525Abstract: An electric reflector lamp is disclosed having a reflecting surface and a neck. A light source having a glass lamp vessel with a pinch seal is accommodated in the reflector body, the pinch seal being located in the neck. A mounting plate is present on the pinch seal. The plate is the bottom of a bush which extends axially along the lamp vessel towards the reflecting surface and which has a transversely extending rim which closes the neck.Type: GrantFiled: March 13, 1996Date of Patent: March 10, 1998Assignee: U.S. Philips CorporationInventor: Winand H. A. M. Friederichs
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Patent number: 5705881Abstract: The disclosure relates to very high power (one megawatt and more) electron tubes with cylindrical anodes. To cool the anode, which receives about one kilowatt per square centimeter, water is usually made to circulate in a jacket surrounding the anode with grooves to facilitate ebullition. The invention proposes a structure where the anode wall is drilled in its thickness and throughout its height with very fine and very numerous water circulation conduits. The anode is made in many superimposed sections brazed to one another by their edges. The conduits are formed in the individual sections before this brazing operation. The channels all lead into a structure for the distribution of cooling water which distributes the water uniformly in all the tubes. The anode can thus distribute a flux with power of over 2 kW/cm.sup.2 on a surface area of over 1000 cm.sup.2.Type: GrantFiled: May 22, 1995Date of Patent: January 6, 1998Assignee: Thomson Tubes ElectroniquesInventors: Olivier Friquet, Regis Combet
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Patent number: 5466988Abstract: A high pressure discharge lamp is disclosed. The high pressure discharge lamp includes: a discharge tube which is filled with gas; a first electrode having a first end, the first electrode being provided in the discharge tube; and a second electrode having a second end which is positioned away from the first end by a certain distance, the second electrode being provided in the discharge tube. In the high pressure discharge lamp, arc discharge is induced by a voltage applied between the first end of the first electrode and the second end of the second electrode. The high pressure discharge lamp further includes a convection regulating member which is electrically insulating and provided in the discharge tube. The convection regulating member suppresses the deformation of the arc discharge caused by the convection of the gas in the discharge tube.Type: GrantFiled: May 7, 1993Date of Patent: November 14, 1995Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Makoto Horiuchi, Kazutaka Koyama, Takayuki Kamitani, Masataka Ozawa
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Patent number: 5256930Abstract: A cooled plasma source for producing ions by electrical discharge. A cooled plate is positioned in the chamber of the plasma source for blocking thermal radiation from an electron-emitting cathode. The presence of the cooled plate results in significantly decreased substrate temperatures, as compared to use of conventional plasma source apparatus. As a result, the cooled plasma source may be used for treatment of heat-sensitive plastic substrates.Type: GrantFiled: February 10, 1992Date of Patent: October 26, 1993Assignee: Commonwealth Scientific CorporationInventor: William E. Hughes
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Patent number: 5028835Abstract: A thermionic energy converter comprises an emitter, a transparent collector support generally parallel to an emitting surface of the emitter, a conductive film collector from about 10 to about 3,000 Angstroms in thickness covering a support surface of the collector support, and an enclosure for maintaining a controlled atmosphere in the gap between the conductive film collector and the emitting surface. According to another embodiment an improvement is set forth in a thermionic energy converter comprising an emitter, a collector and an enclosure adapted to maintain a controlled atmosphere in the emitter-collector gap. The improvement comprises an insulator post supportingly attaching the emitter and the collector. The embodiments are advantageously used together.Type: GrantFiled: October 11, 1989Date of Patent: July 2, 1991Inventor: Gary O. Fitzpatrick
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Patent number: 5017824Abstract: A thin film electroluminescent (TFEL) edge emitter module and packaging assembly is composed of a TFEL edge emitter module including an electroluminescent (EL) stack having a linear array of spaced-apart pixels with light-emitting front edges, an enclosure defining a sealed cavity which encloses at least a portion of the EL stack so as to sealably enclose the array of pixels in a contaminant-free environment, a thermally expansive and contractive liquid substantially filling the sealed cavity, and a cavity capacity expansion and contraction mechanism disposed in the enclosure in communication with the cavity and the liquid therein. In response to thermal expansion of the volume of the liquid filling the cavity, the capacity expansion and contraction mechanism is operable to change from a first condition toward a second condition and thereby increase the liquid-holding capacity of the enclosure cavity.Type: GrantFiled: November 13, 1989Date of Patent: May 21, 1991Assignee: Westinghouse Electric Corp.Inventors: Norman J. Phillips, David Leksell, Henry A. Wehrli, III, William A. Barrow, Mark S. Kruskopf
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Patent number: 5001387Abstract: The electric lamp has a lamp vessel (1) which is fixed by means of cement (6) in a lamp cap (3) of synthetic material. A metal ring (7) in contact with the cement (6) is present in the lamp cap (3), as a result of which the cement (6) can be secured by inductive heating of the metal ring (7). The lamp cap (3) has ribs (10,11) on the inside surface of the lamp cap (3), by which the metal ring (7) is radially and axially separated from the lamp cap (3).Type: GrantFiled: September 28, 1987Date of Patent: March 19, 1991Assignee: U.S. Philips CorporationInventor: Johannes M. A. van der Heijden
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Patent number: 4629929Abstract: A metal vapor discharge lamp having an outer tube having an inert gas filling the inner space and an arc tube disposed in the interior of this outer tube and having in a discharge space in the interior a pair of electrodes. The discharge space is filled with at least a rare gas and mercury. A lower light transmissive covering member covering at least the lower end part of the arc tube is positioned in the vicinity of the end part of the light emitting tube which is the lower end during lighting. This reduces the temperature reduction of the lower part of the arc tube due to convection of the gas within the outer tube, increasing the temperature of the coldest part of the arc tube, whereby the vapor pressure in the interior of the arc tube is raised to improve luminous efficiency.Type: GrantFiled: September 26, 1983Date of Patent: December 16, 1986Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masato Saito, Ryo Suzuki, Keiji Watanabe, Michihiro Tsuchihashi
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Patent number: 4563609Abstract: A directly-heated cathode for power electron tubes such as triodes, tetrodes or pentodes comprises a cylindrical sleeve constituted by a lattice of crossed wires forming the emissive portion of the cathode and by two conductive plates attached respectively to each end of the sleeve. In order to permit free deformation of the cathode, a flexible metallic bellows element is fixed between one of the plates and the corresponding end of the cylindrical sleeve.Type: GrantFiled: August 18, 1983Date of Patent: January 7, 1986Assignee: Thomson-CSFInventors: Guy Clerc, Pierre Gerlach, Roger Hoet
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Patent number: 4546284Abstract: A low-pressure mercury vapor discharge lamp having a lamp envelope (1) which encloses a folded tubular discharge vessel (2), the discharge vessel being provided with an appendix (6) which is kept at a relatively low temperature by a heat shield (7) located within the lamp envelope. The heat shield shields the outer wall surface of the appendix from the outer wall of the discharge vessel. The cooler appendix serves to maintain the mercury vapor pressure at an optimum value during operation of the lamp.Type: GrantFiled: October 17, 1979Date of Patent: October 8, 1985Assignee: U.S. Philips CorporationInventors: Max L. P. Renardus, Bauke Sieswerda
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Patent number: 4490649Abstract: The ballast temperature in the base up position of a miniature arc discharge lamp is reduced, increasing its lifetime, by placing a thin transparent thermal convection/radiation baffle between the arc tube and lamp filament, which are the heat source, and the interface of the envelope with the ballast housing. Greater temperature reduction is realized by putting insulation inside the housing cover and reducing the diameter of wires supporting the arc tube and filament, the latter a ballast resistor.Type: GrantFiled: October 20, 1982Date of Patent: December 25, 1984Assignee: General Electric CompanyInventor: Hsin-Pang Wang