Patents Examined by Palmer C. Demeo
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Patent number: 5235244Abstract: An arrangement for and method of automatically collimating an expanding electron beam emitted from a field emission cathode is disclosed herein. This is accomplished without an externally powered colimating or focusing electrode. Rather, a dielectric member is positioned around the path taken by the beam so that when the beam is initially turned on, it bombards the dielectric member with free electrons and thereby places a negative electrostatic charge, ultimately reaching the potential of the cathode electrode itself, on the dielectric member. This electrostatic charge, in turn, causes the cross-sectional configuration of the beam to contract.Type: GrantFiled: September 8, 1992Date of Patent: August 10, 1993Assignee: Innovative Display Development PartnersInventor: Charles A. Spindt
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Patent number: 5233262Abstract: A flat form gas discharge lamp is disclosed which includes glass front and back plates mounted together and in which the front plate is formed with a plurality of channels which are sealed to confine an ionizable medium. The channels are oriented in parallel relationship and are separated by gaps. Optical means is placed in the gaps for intercepting secondary light which is transmitted laterally from side walls of the channels and redirected toward the front of the lamp. Secondary light in combination with the primary transmitted through front walls of the channels provides illumination across an area with optimum brightness uniformity and efficiency.Type: GrantFiled: May 15, 1992Date of Patent: August 3, 1993Assignee: Judd B. LynnInventors: Judd B. Lynn, William E. Coleman
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Patent number: 5233265Abstract: A photoconductive device having a photoconductive layer which includes an amorphous semiconductor layer capable of charge multiplication in at least a part thereof is disclosed. The method of operating such a photoconductive device is also disclosed. By using the avalanche effect of the amorphous semiconductor layer, it is possible to realize a highly sensitive photoconductive device while maintaining low lag property. In one aspect of the present invention, the amorphous semiconductor layer is amorphous Se. In another aspect of the present invention, the amorphous semiconductor layer is composed mainly of tetrahedral elements including at least an element of hydrogen or halogens. When using the amorphous semiconductor layer composed mainly of tetrahedral elements, the charge multiplication effect is produced mainly in the interior of the amorphous semiconductor, and thus it is possible to obtain a thermally stable photoconductive device having a high sensitivity while keeping a good photoresponse.Type: GrantFiled: August 1, 1990Date of Patent: August 3, 1993Assignees: Hitachi, Ltd., Nippon Hoso KyokaiInventors: Yukio Takasaki, Kazutaka Tsuji, Tatsuo Makishima, Tadaaki Hirai, Sachio Ishioka, Tatsuro Kawamura, Keiichi Shidara, Eikyu Hiruma, Kenkichi Tanioka, Junichi Yamazaki, Kenji Sameshima, Hirokazu Matsubara, Kazuhisa Taketoshi, Mitsuo Kosugi, Shiro Suzuki, Takashi Yamashita, Masaaki Aiba, Yoshizumi Ikeda, Tsuyoshi Uda, Naohiro Goto, Yasuhiko Nonaka, Eisuke Inoue, Hirofumi Ogawa
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Patent number: 5229681Abstract: A discharge lamp with offset or tilted arc tube includes a glass envelope or bulb which surrounds an arc tube. One end of the bulb has a threaded mount for securement into a lamp socket. The arc tube is supported inside the bulb in a position whereby the longitudinal axis of the arc tube is offset from the longitudinal axis of the bulb.Type: GrantFiled: May 6, 1992Date of Patent: July 20, 1993Assignee: Musco CorporationInventors: Myron K. Gordin, Jim L. Drost
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Patent number: 5223766Abstract: A thin type image display device for displaying an image by emitting light from a fluorescer with irradiation of electron beams thereto. The device has a cathode panel between a front panel and a back panel in such a manner that a space is existent between the cathode panel and the back panel, wherein through holes for diffusion of getters are formed in the cathode panel to maintain the image quality at the center of a display screen, or the cathode panel is supported by getters to maintain a required pressure, hence attaining a higher image quality even on a large-sized display screen. A gate electrode may be composed of a getter material.Type: GrantFiled: April 26, 1991Date of Patent: June 29, 1993Assignee: Sony CorporationInventors: Akira Nakayama, Junichi Inoue, Masanobu Yamamoto
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Patent number: 5220237Abstract: A metal halide lamp apparatus includes a reflecting mirror and a metal halide lamp has a reflecting/thermal insulating film and a frost portion which is partially formed on the lamp outer surface within a predetermined range continued from the reflecting/thermal insulating film. This causes a decrease in an overall illuminance decrease and the attainment of a desired illuminance ratio and prevents the occurrence of irregularity in illuminance and color. In addition, since electrodes are asymmetrically disposed, it is possible to decrease the rate of devitrification of the luminous tube and make an attempt to increase the life of the luminous tube.Type: GrantFiled: May 10, 1991Date of Patent: June 15, 1993Assignee: Iwasaki Electric Co., Ltd.Inventors: Kyoichi Maseki, Kazutoshi Kurosawa, Akira Urushihara
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Patent number: 5220244Abstract: A metal halide lamp of the present invention comprises a luminous tube alone without any outer bulb, the luminous tube containing metal halides such as neodymium halides (NdX.sub.3), dysprosium halides (DyX.sub.3) and cesium halides (CsX) in a total amount by mole of 1.times.10.sup.-6 to 8.times.10.sup.-6 mol/cc and the following molar ratios: ##EQU1## as well as rare gas serving as starting auxiliary gas and mercury serving as buffer gas. This structure permits a predetermined vapor pressure of the metal halides sealed in the luminous tube to be obtained without increasing the wall load, as well as the formation of a metal halide lamp having a long life and good color characteristics.Type: GrantFiled: November 27, 1991Date of Patent: June 15, 1993Assignee: Iwasaki Electric Co. Ltd.Inventors: Kyoichi Maseki, Masao Niijima, Akira Urushihara, Shinya Suzuki, Kazushi Tominaga
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Patent number: 5220242Abstract: A high resistance body for supplying the high voltage of an anode terminal to the electrodes of an electron gun is coil-shaped. The anode terminal is mounted on the funnel portion of a glass bulb, and overlapped by a first conducting layer. The anode terminal is electrically connected to the electrodes of the electron gun comprising the coil-shaped high resistance body, second conducting layer and metal strip. The equivalent circuit comprises a resistance and condenser connected in parallel, at least an inductance generated by the coil-shaped high resistance body connected in series to the resistance, and the electrodes of the electron gun.Type: GrantFiled: August 30, 1991Date of Patent: June 15, 1993Assignee: Goldstar Co., Ltd.Inventor: Woong B. Choi
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Patent number: 5220236Abstract: A fluorescent lighting structure having an inner glass envelope and an outer glass envelope surrounding the inner glass envelope, an ionizable gas contained within the volume between the inner and outer glass envelopes, an electrode structure disposed on the inside surface of the inner glass envelope, a phosphor coating disposed on the outside surface of the inner glass envelope, and an ultraviolet reflective coating on the inside surface of the outer glass envelope. Excitation of the electrode structure causes discharge of the ionizable gas that produces ultraviolet radiation, which in turn excites the phosphor coating to emit visible light.Type: GrantFiled: February 1, 1991Date of Patent: June 15, 1993Assignee: Hughes Aircraft CompanyInventors: Robert D. Washburn, Robert F. McClanahan, David A. Head
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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
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Patent number: 5218267Abstract: An improved color picture tube includes an evacuated envelope having a rectangular faceplate panel. The panel includes a viewing screen on an inner surface thereof and a shadow mask assembly mounted therein by support means located at the four corners of the panel. The shadow mask assembly includes an apertured shadow mask and a peripheral frame to which the mask is attached. The frame is formed by four sections that are welded together at their ends. Two of the sections are longer than the other two sections and are constructed of a material having a different coefficient of thermal expansion than that of the other two sections. The frame reduces electron beam misregister with elements of the screen.Type: GrantFiled: November 17, 1992Date of Patent: June 8, 1993Assignee: Thomson Consumer Electronics, Inc.Inventor: Frank R. Ragland, Jr.
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Patent number: 5218262Abstract: In an electrode assembly, an electrode holder has a forward end thereof affixed coaxially to an electrode tip. An attachment member is affixed to the holder rearwardly of the electrode. A retaining assembly includes an outer cup component, an inner cup component and a magnet therein. An electrical lead is connected to the inner cup component. The electrode assembly fits coaxially into the retaining assembly with the attachment member adjacent to and retained by the magnet. The electrode holder is seated in electrical contact with the inner cup component. The holder, cup components and attachment member are magnetically permeable, and separated in each assembly by insulators, so as to effect an outer magnetic shielding loop and an inner magnetic shielding loop.Type: GrantFiled: April 6, 1992Date of Patent: June 8, 1993Assignee: The Perkin-Elmer CorporationInventors: Masami Taguchi, Charles A. Brantingham
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Patent number: 5218269Abstract: A glow discharge lamp includes a light-transmitting envelope containing a noble gas fill material. An anode electrode and a cathode electrode are spacedly located within the envelope. The anode electrode includes a single wire having a convoluted portion adjacent the cathode electrode and lying in a plane parallel to a plane intersecting the cathode electrode and a pair of lead-in wires supporting the cathode electrode. The improved anode construction results in an increase in both light output and lamp efficacy.Type: GrantFiled: November 29, 1991Date of Patent: June 8, 1993Assignee: GTE Products CorporationInventor: Andre C. Bouchard
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Patent number: 5218265Abstract: In a combined mask/frame for a colour picture tube, a mask is attached to a frame by means of spot welds which are positioned at the corners and adjacent to the long center axis and the short center axis. Of central importance is the fact that all spot welds are arranged as double spot welds instead of single spot welds which were usual until now. The single spot welds of each double spot weld are located basically at the same height of the mask skirt but are slightly separated from each other.Type: GrantFiled: February 20, 1992Date of Patent: June 8, 1993Assignee: Nokia (Deutschland) GmbHInventor: Rolf Reidinger
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Patent number: 5216320Abstract: The present invention improves the stability among the qualities of the electron tube cathodes in which the barium scandate is dispersed and contained in the alkali earth metal oxide layer provided on the surface of the base metal, by making the shape and average particle size of the barium scandate similar to those of the carbonate used to form the alkali earth metal oxide, and it avoids the deterioration of the electron emission property for a long time, by setting the concentration of the barium scandate in the alkali earth metal oxide layer to zero at the position close to the surface of the base metal.Type: GrantFiled: October 7, 1991Date of Patent: June 1, 1993Assignee: Hitachi, Ltd.Inventors: Sachio Koizumi, Hiroshi Takanobu, Sadanori Taguchi
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Patent number: 5216323Abstract: Low-pressure mercury vapor discharge lamp for suntanning purposes comprising a tubular discharge vessel which is provided on the inside with a first luminescent layer comprising a first luminescent material which emits mainly UVA and with a second luminescent layer which comprises a second luminescent material which emits mainly UVA, the two luminescent materials also showing mutually different UVB emission contents. At least one of the two luminescent layers extends over only part of the circular circumference of the discharge vessel with the object of obtaining different quantities of UVB radiation emission in different transverse directions of the lamp. The luminescent material having the lowest UVB emission is disposed on the wall of the discharge vessel and absorbs a portion of the UVB emission from the other luminescent material which is disposed closest to the discharge and has the higher UVB emission.Type: GrantFiled: April 7, 1992Date of Patent: June 1, 1993Assignee: U.S. Philips CorporationInventors: Johannes P. M. Baaten, Paulus A. M. Vermeulen
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Patent number: 5216325Abstract: An improved solid state spark gap for use, for example, in firing munitions. The spark gap is formed by depositing a trigger electrode on a dielectric substrate, precisely covering the trigger electrode and an adjoining area with a dielectric layer, and forming an anode and a cathode on the dielectric layer with a spark gap there between. The anode and cathode do not overlap the trigger electrode. The spark gap may be enclosed within a hermetically sealed inert gas filled cover.Type: GrantFiled: January 24, 1990Date of Patent: June 1, 1993Assignee: Magnavox Government and Industrial Electronics CompanyInventors: Chiman R. Patel, Timothy B. Bonbrake, Barry L. Driscoll
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Patent number: 5214351Abstract: A discharge tube includes a pair of electrode devices mounted within a discharge tube body in an opposed relation to each other, each of the pair of electrode devices including an arc discharge electrode and a glow discharge electrode. An electron-radiating substance vaporized and emitted in a scattered manner from the arc discharge electrode is captured by the glow discharge electrode. The arc discharge electrode is composed of a sintered body containing the electron-radiating substance therein.Type: GrantFiled: July 12, 1991Date of Patent: May 25, 1993Assignees: Tokyo Densouku Kabushiki Kaisha, Noritake Co., LimitedInventor: Yoriyuki Nieda
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Patent number: 5214348Abstract: The applications of the CRT proposed by the present invention include televisions and computer terminals, and the object of the present invention is to increase electrical security of the CRT. The CRT has a metal part 8 forming a vacuum glass container in order to reduce the weight of the CRT. A stud pin 12 made of an insulating material is on the inner surface of the metal part and fixes the shadow mask. The metal part 8 is joined between an edge of the panel screen 2a and an edge of the funnel 4, and forms a part of the vacuum container where the highest stress is applied. The stud pin 12 is fixed to the inner surface of the metal part 8 and fixes the shadow mask 10 by sealing to a plate spring 13 welded to the edge of the shadow mask 10. Since the stud pin 12 is insulating, it electrically separates the metal part 8 from the high voltage shadow mask 10. The stud pin 12 has a constriction or a multistage fin, and around the stud pin shielding material 16 made of a metal mesh or a metal plate is placed.Type: GrantFiled: November 7, 1991Date of Patent: May 25, 1993Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Koji Nakamura, Keitaro Tsukui, Junko Itoh
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Patent number: 5214349Abstract: A color selection electrode device mounts: a color selection electrode composed of filaments for regulating the position which an electron beam of the cathode ray tube reaches on a pair of U-shaped frame bodies between which the color selection electrode is stretched. Support pieces are provided for connecting both end portions of the pair of frame bodies and holding the frame bodies at a predetermined space. The color selection electrode is a metal electrode which is composed of, for example, a multiplicity of filaments. The support pieces are composed of an elastic material and are bent due to the load which is applied to the frame bodies, thereby shortening the distance between the frame bodies. In this state, the color selection electrode is stretched between the frame bodies and both ends thereof are welded to the frame bodies. Thereafter, when the load is removed, a predetermined tension is uniformly applied to the color selection electrode by the elastic restoring force.Type: GrantFiled: October 24, 1991Date of Patent: May 25, 1993Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Shigeki Sakata, Akito Yamamoto, Mizuki Murata