Patents Examined by K. Wieder
  • Patent number: 4864190
    Abstract: The invention provides a structure for reducing potentially harmful effects emanating from a video display terminal having a screen on a cathode ray tube. The structure includes a light-transparent first medium proportioned to cover the screen and being of a material capable of absorbing ionizing radiation. An electrically conductive second medium is also proportioned to cover the screen and is sufficiently light transparent to permit normal viewing of visual displays on the screen. The second medium reacts with non-ionizing radiation to dissipate this radiation and a frame is provided to hold the first and second mediums. The frame includes a discharge connection for coupling the second medium to ground to dissipate a charge in use in the second medium.
    Type: Grant
    Filed: June 10, 1987
    Date of Patent: September 5, 1989
    Assignee: Ancile Inc.
    Inventor: Alfred T. Orr
  • Patent number: 4849672
    Abstract: A method of producing electroluminescence without a chemical reaction by the decay of the energy level of electrons from an excited state which results from collision of accelerated free electrons with ions in the oxide, the free electrons being accelerated by space charges within the oxide of adjacent to the boundary thereof as a result of a P-N junction. Electroluminescing lamps are also disclosed.
    Type: Grant
    Filed: May 21, 1986
    Date of Patent: July 18, 1989
    Assignee: Advanced Lighting International
    Inventor: Scott Anderson, Sr.
  • Patent number: 4839556
    Abstract: A cathode-ray tube includes a shadow mask mounted therein. The mask has curvatures along its major and minor axes. The curvature along the major axis is greater at the sides of the mask than at the center of the mask.
    Type: Grant
    Filed: February 25, 1983
    Date of Patent: June 13, 1989
    Assignee: RCA Licensing Corporation
    Inventor: Frank R. Ragland, Jr.
  • Patent number: 4837478
    Abstract: The invention is concerned with an illuminator to radiate light rays in the near-infrared region, and a near-infrared ray image pick-up device which irradiates the near-infrared light radiated from this illuminator onto an object to be pictured, and captures light reflected from the object for image pick-up. By constructing the illuminator with an electric discharge lamp and a filter which removes the visible region and permit the near-infrared region to pass therethrough out of light rays radiated from this electric discharge lamp, there can be provided a near-infrared ray radiation illuminator having a high efficiency and low deterioration characteristic.
    Type: Grant
    Filed: December 10, 1987
    Date of Patent: June 6, 1989
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshinori Anzai, Takao Saikatsu, Masato Saito, Michihiro Tsuchihashi
  • Patent number: 4833364
    Abstract: An electron gun for a color picture tube has at least a cathode, a control grid, an accelerating grid, a focus grid and an anode, each of which has three apertures aligned in line. The focus grid and the anode made of elongated plates serves as main lens electrodes, and the apertures of the focus grid and the anode constitute a main lens assembly. The three apertures of each of the elongated plates has a central aperture defined by two first curves arcuated outward, two side apertures each of which is defined by a second curve as an inner half arcuated inward and a third curve as an outer half arcuated outward, the first and second curves being less arcuated than the third curve. The three apertures are aligned such that the major axes thereof are parallel to a shorter axis of the elongated plate and are located at equal intervals. The three apertures are spaced apart from each other through corresponding bridge portions.
    Type: Grant
    Filed: April 2, 1985
    Date of Patent: May 23, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Yukihiro Izumida, Shoji Shirai, Hidemasa Komoro, Kazuo Majima, Akio Yamaguchi
  • Patent number: 4833365
    Abstract: An electron gun for a color picture tube consists of a triode that generates a plurality of electron beams and a main lens which focuses and converges the electron beams. The main lens can be divided into two types, i.e., a pair of bi-potential focusing electron lenses and a combination of the bi-potential focusing electron lens and a uni-potential focusing electron lens. The electrodes constituting the main lens have apertures for permitting the transmission of a plurality of electron beams. The center axes of apertures are deviated toward the center axis of the embodiment of electron gun away from the axes of initial paths of the electron beams emitted from the triode.
    Type: Grant
    Filed: February 12, 1987
    Date of Patent: May 23, 1989
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Shoji Shirai, Hidemasa Komoro, Yoshiaki Takahashi, Masakazu Fukushima, Kazuo Majima
  • Patent number: 4831308
    Abstract: An ion beam apparatus with an ion gun in which a gas to be ionized is supplied to the periphery of an emitter and a high voltage is applied between the emitter and an extractor so that the gas introduced to the vicinity of the emitter tip is ionized to generate an ion beam. The structure of the ion gun is formed so as to achieve a high ion current density of the ion beam as well as to prevent short-circuiting that may otherwise be caused by atmospheric electric discharge between the emitter and the extractor.
    Type: Grant
    Filed: September 25, 1987
    Date of Patent: May 16, 1989
    Assignee: Sony Corporation
    Inventors: Morikazu Konishi, Masaaki Takizawa
  • Patent number: 4827180
    Abstract: A color picture tube having a shadow mask structure with a shadow mask and a mask frame supporting the shadow mask facing a phosphor screen inside a panel comprises a plurality of V-shaped support members, each having a folded portion apart from a sidewall of the mask frame and two arm portions extending from the folded portion.The support members support the shadow mask structure to the panel to control a relative distance beween the phosphor screen and the shadow mask according to thermal expansion of the shadow mask structure or the panel, whereby positions impinged by an electron beam on the phosphor screen remained invariably.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: May 2, 1989
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshinao Sone, Hiroshi Urata, Michio Nakamura, Tooru Takahashi, Hidetoshi Yamazaki, Kiyoshi Tokita
  • Patent number: 4825125
    Abstract: A low pressure discharge lamp, particularly a compact fluorescent lamp, having a plurality of constricting portions axially spaced apart and extending about the circular periphery of the envelope. The constricting portions, which include defined end segments projecting within the envelope, constrict the plasma discharge and spatially separate at least one of the discharge processes occurring within the plasma discharge and cause the separated process to take place in a different portion within the envelope so that the conditions for energy input and energy dissipation may be independently optimized.
    Type: Grant
    Filed: November 2, 1987
    Date of Patent: April 25, 1989
    Assignee: GTE Products Corporation
    Inventors: Radomir Lagushenko, Jakob Maya, Robert Y. Pai
  • Patent number: 4823048
    Abstract: The electric lamp has a lamp vessel provided with a pinched seal, in which a metal foil is accommodated, which is connected to an external current conductor and to an internal current conductor. The metal foil has a welding connection with the internal current conductor on its first major surface. A metal auxiliary foil is welded against the second major surface of the metal foil and is welded against the internal current conductor. The lamp has a simple construction and has during operation a comparatively low temperature of the pinched seal.
    Type: Grant
    Filed: March 15, 1988
    Date of Patent: April 18, 1989
    Assignee: U.S. Philips Corporation
    Inventor: Leo F. Ooms
  • Patent number: 4823045
    Abstract: A picture taking tube is provided having a bias light device, said device being formed by a diffuser and a ring of light emitting diodes, which are placed about the glass vacuum enclosure of the tube, the light penetrating into the enclosure through gaps between the electrodes of the tube and also, if necessary, through small sized openings formed in these electrodes.
    Type: Grant
    Filed: October 16, 1987
    Date of Patent: April 18, 1989
    Assignee: Thomson-CSF
    Inventors: Jean-Luc Ricaud, Bernard Plos
  • Patent number: 4818913
    Abstract: A method of aging a thin-film electroluminescent (EL) display element comprises the steps of applying an aging voltage to electrodes of the element, and changing the peak value of the aging voltage in accordance with the characteristics of the element which change during an aging period. An aging circuit to perform the above method is provided. In a specific example, the magnitude of the aging voltage is changed according to the relationship between the brightness of electroluminescence generated from the element and a driving voltage applied to the element. In another specific example, the magnitude of the aging voltage is changed such that the brightness of the electroluminescence is sustained to be substantially constant, thereby making operation points constant on the above characteristics.
    Type: Grant
    Filed: July 23, 1982
    Date of Patent: April 4, 1989
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kinishi Isaka, Masashi Kawaguchi, Hisashi Uede
  • Patent number: 4816719
    Abstract: A low pressure arc discharge tube having structural means located within the envelope for causing a positive shift in the volt-ampere characteristic curve of the arc discharge tube. The shift in the volt-ampere curve causes a decrease in the impedance necessary to stabilize and ballast the discharge.
    Type: Grant
    Filed: December 6, 1984
    Date of Patent: March 28, 1989
    Assignee: GTE Products Corporation
    Inventors: Jakob Maya, Rodomir Lagushenko
  • Patent number: 4816716
    Abstract: A flat fluorescent display panel, having in parallel an anode plate and a cover plate separated by a frame-type spacer whose central open area defines an inner space for a fluorescent material and electrode structure. The three layers are joined and sealed together such that the inner space may be evacuated. The cover is cut or slit, forming an opening that expose the inner space and permits evacuation. The opening is closed and sealed by a portion of the cover or some suitable sealing structure.
    Type: Grant
    Filed: August 31, 1987
    Date of Patent: March 28, 1989
    Assignee: NEC Corporation
    Inventors: Masaki Kobayakawa, Yo Takasaki, Hiroshi Saeki
  • Patent number: 4814666
    Abstract: The present invention relates to an electron-beam excited display tube useful in such a display apparatus as a color cathode-ray tube. In accordance with the present invention, the content of europium as a activator for a rare earth oxysulfide fluorescent material used as the red emission component is within the range of 0.05 to 2.0 mol %, thereby providing a very bright and low cost electron-beam excited display tube without any uneven color reproduction, even when the display screen is seen from very close quarters.
    Type: Grant
    Filed: March 9, 1987
    Date of Patent: March 21, 1989
    Assignee: Kasei Optonix, Ltd.
    Inventors: Kazuhito Iwasaki, Hideo Tono, Susumu Omatoi
  • Patent number: 4814665
    Abstract: In a center electrode structure for spark plug including a tubular insulator, the inner side of which has a stepped shoulder to provide a diameter-reduced bore therein; a center electrode having a flange, and concentrically placed into the insulator with the flange engaging against the shoulder, and with one end being axially through the bore so as to be exposed to outside of the insulator; the center electrode having a highly heat conductive core of copper or copper-based alloy which is encased into an enclosure made of oxidation and heat resistant nickel-based alloy; and the core providing its overall outer surface with a thin oxidation layer, so that the core is clad with the enclosure through the oxidation layer by means of extrusion.
    Type: Grant
    Filed: September 11, 1987
    Date of Patent: March 21, 1989
    Assignee: NGK Spark Plug Co. Ltd.
    Inventors: Akio Sakura, Mitsutaka Yoshida, Junichi Kagawa
  • Patent number: 4814668
    Abstract: An electroluminescent display device comprising an electroluminescent emitting layer including zinc oxide containing a luminescent active material, an insulating layer formed on one surface of the electroluminescent emitting layer and a pair of energizing means for applying signal voltages corresponding to an information to be displayed to a multilayer assembly including the said two layers, characterized in that a plurality of semiconductor layers each containing at least one chemical compound selected from the group consisting of chemical compounds of the II-VI groups and tin oxide are arranged as one of the energizing means arranged on the side of the electroluminescent emitting layer or between the energizing means arranged on the side of the electroluminescent emitting layer and the electroluminescent emitting layer. This device features that it requires only a reduced drive voltage for image displaying purposes and ensures an increased luminescent brightness.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: March 21, 1989
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takao Tohda, Tomizo Matsuoka, Yosuke Fujita, Atsushi Abe, Tsuneharu Nitta
  • Patent number: 4812706
    Abstract: To avoid the deflection phenomenon of the red and blue spots of a trichromatic tube with in line cathodes, as a function of a variation of the focusing voltage, the holes corresponding to these two colors are enlarged over a distance of about 0.1 to 0.2 mm.
    Type: Grant
    Filed: November 19, 1986
    Date of Patent: March 14, 1989
    Assignee: Videocolor
    Inventors: Jacques Baudry, Gerard Proudhon
  • Patent number: 4812774
    Abstract: In an electron storage ring comprising: a bending magnet for bending an electron beam; a focusing magnet for focusing the electron beam; a radio-frequency accelerating cavity for accelerating electrons; and a vacuum chamber, a voltage component fluctuating with time, e.g., sinusoidally is superposed on the power source of the focusing magnet, in case the electron beam is to be accelerated, to fluctuate the intensity of the focusing magnet. As a result, the number of the betatron oscillation of electron can be changed each time the electrons pass through the focusing magnet so that the damping rate can become higher than the growth rate of the instability of the beam to suppress the instability of the electron beam.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: March 14, 1989
    Assignee: Hitachi, Ltd
    Inventors: Koji Tsumaki, Kenji Miyata, Masatsugu Nishi
  • Patent number: 4812702
    Abstract: An excitation coil, for stimulating a high-intensity-discharge plasma in an electrodeless discharge lamp, has at least one turn of a conductor arranged generally upon the surface of a toroid with a rhomboid or V-shaped cross-section, which is substantially symmetrical about a plane passing through the maxima of the toroid. The major radius of the coil is such that the lamp is insertable into the coil so that the coil induces a co-planar toroid plasma discharge arc in the lamp, when the coil is connected to a radio frequency (RF) power source.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: March 14, 1989
    Assignee: General Electric Company
    Inventor: M. John Anderson