Patents Examined by Robert Segal
  • Patent number: 4458174
    Abstract: A color display tube comprises, in an evacuated envelope, means for generating a number of electron beams, a display screen comprising a large number of regions luminescing in different colors when struck by the beams, and color selection means for associating each electron beam with luminescent regions of one color. The color selection means includes a plurality of conductive strips and a metal plate having a plurality of parallel apertured rows. The plate, between the apertured rows, and the strips, in the sides facing the plate, have grooves extending in the longitudinal direction of the strips. The strips are accurately positioned between the rows by insulating carriers secured in respective grooves by adhesive materials. Each carrier engages its respective grooves in only two locations per groove. The adhesive material, at least in the grooves of the strips, is an electrically conductive adhesive.
    Type: Grant
    Filed: May 30, 1980
    Date of Patent: July 3, 1984
    Assignee: U.S. Philips Corporation
    Inventor: Abraham A. De Keijzer
  • Patent number: 4446400
    Abstract: A gaseous display panel having a base plate and a face plate is disclosed. A plurality of groups of cathode segments are disposed on the base plate, and a plurality of anodes are disposed on the face plate. Each anode has a plurality of electrically conductive web portions extending across at least one of the cathode segments, the anodes, including the web portions, being deposited onto the face plate simultaneously with the application of a conductive layer used to outline the anode.
    Type: Grant
    Filed: December 16, 1980
    Date of Patent: May 1, 1984
    Assignee: Cherry Electrical Products Corporation
    Inventor: Walter L. Cherry
  • Patent number: 4420708
    Abstract: A high-pressure sodium vapor discharge lamp contains an electron-emitting material consisting of alkaline earth metals bound to oxygen and tungsten bound to oxygen. It has been found that such lamps of less than 400 W which have either a high Hg/Na ratio or use neon/argon as a starter gas fail prematurely when the alkaline earth metals and tungsten in the electron-emitting material are present in stoichiometric quantities.The free ends of electrodes of lamps according to the invention are wound with tungsten wire. Electron-emitting material comprising carium, strontium and calcium bound to oxygen and tungsten bound to oxygen is disposed in the cavities formed between the tungsten wire turns. The molar ration of the total barium, strontium and calcium bound to oxygen to the tungsten bound to oxygen is between 8 and 50.
    Type: Grant
    Filed: August 28, 1980
    Date of Patent: December 13, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Cornelis A. J. Jacobs, Peter A. W. Tielemans
  • Patent number: 4393323
    Abstract: An assembly for shielding a fluorescent light tube is disclosed. The assembly includes an elongated plastic, tubular shield having an inner peripheral surface and which is adapted to be disposed around the light tube. An elongated, expanded metal, generally tubular shaped heat sink is positioned adjacent the inner peripheral surface of the shield. The shield and heat sink are supported around the light tube by a pair of end caps.
    Type: Grant
    Filed: January 23, 1981
    Date of Patent: July 12, 1983
    Assignee: Plascore, Inc.
    Inventor: Fritz Hubner
  • Patent number: 4389591
    Abstract: A charge storage target of cathode ray electron devices comprises a conductive layer and a resistive layer having a common interface therewith, and an insulative layer. At least one of the layers has perforations so that only the resistive and insulative layers are exposed to electron impingement. The perforations define a plurality of elemental regions on which elemental electron image is stored. The resistive regions that cover the underlying conductive layer serve as buffer areas for the entering electrons of which the magnitude is proportional to the amount of charges deposited on the exposed insulative regions, and transfer the stored energy to the underlying layer.
    Type: Grant
    Filed: January 11, 1980
    Date of Patent: June 21, 1983
    Assignee: Matsushita Electric Industrial Company, Limited
    Inventor: Yoshihiro Uno
  • Patent number: 4388550
    Abstract: In a gas discharge display panel, a plurality of gas discharge cells are arranged between a plurality of display anode conductors and a cathode conductor. The cathode conductor is formed of hollow cathodes having cavities with apertures facing the display anode conductors. The hollow cathodes widen from the apertures on the side remote from the display anode conductors up to a transverse dimension a and extend in a direction from the anode conductors to a depth b with the transverse dimension a being at least three times the depth b. In this manner, the cavities of the hollow cathodes extend substantially parallel to the cathode conductor, and in addition, can be manufactured in a simple manner.
    Type: Grant
    Filed: October 1, 1980
    Date of Patent: June 14, 1983
    Assignee: U.S. Philips Corporation
    Inventor: Gerhard H. F. de Vries
  • Patent number: 4379980
    Abstract: A quick operating type cathode having a cathode body consisting of: a cathode sleeve and a metal substrate which is mounted at the top opening part of the cathode sleeve and the top surface of which is coated with an electron-emissive material; and a double helical coil heater which is inserted within the cathode sleeve and the surface of which is coated with an insulating material, is characterized in that said heater comprises a coil part and a pair of leg parts connected to the end part of said coil part, a dense pitch part is formed at the top of said coil part, a sparse pitch part is formed in said coil part at the side of the leg parts and the amount of said coated insulating material per unit length of the coil wire at said sparse pitch part is larger than that at said dense pitch part.
    Type: Grant
    Filed: April 20, 1981
    Date of Patent: April 12, 1983
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Yukio Takanashi, Tooru Yakabe, Shunji Asano
  • Patent number: 4376905
    Abstract: There is disclosed an electric lamp with a ceramic discharge tube and a current inlead consisting of two or more elementary filaments passing through a ceramic closing member and soldered thereto. In the tube there is an auxiliary electrode. The elementary filaments are preferably niobium. At least two of the elementary filaments are short circuited at both sides of the closing member and an auxiliary electrode is interlaced with the elementary filaments outside the discharge space.
    Type: Grant
    Filed: February 4, 1981
    Date of Patent: March 15, 1983
    Assignee: Egyesult Izzolampa es Villamossagi Rt.
    Inventor: Bela Kerekes
  • Patent number: 4376257
    Abstract: The electron gun structure comprises a cup shaped control electrode having a top provided with three aligned openings, and one ends of supporting members are secured to the outer wall of the control electrode near a lower opening. Each supporting member extends toward the top from the secured end and includes a portion separated from the outer wall. The other ends of the supporting members are embedded into insulating parts to position the control electrode with respect to other electrodes.
    Type: Grant
    Filed: September 25, 1980
    Date of Patent: March 8, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Miyazaki, Hisao Nakamura
  • Patent number: 4374343
    Abstract: A thin kinescope has the electron gun positioned to emit electrons so that the initial direction of travel is substantially parallel to the plane of the screen. A bowl-shaped reflector is positioned to bend the electron beams toward the screen and to improve the focusing of the electron beams. A unique combination of deflection enhancement and a shunted quadrupole result in maximum deflection so that the entire screen is scanned by the electron beams.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: February 15, 1983
    Assignee: RCA Corporation
    Inventor: Kern K. N. Chang
  • Patent number: 4373145
    Abstract: A thin film electroluminescent device constructed on a smooth surface substrate on which a base conductive layer is formed, followed in sequence by an impurity doped barrier layer, an electrically resistive layer and a counterelectrode layer. The impurity doped barrier layer is doped with a material which exhibits electroluminescence.The impurity doped barrier layer is produced in a controlled oxidation process of the base conductive layer which is alloyed to a minor extent with the impurity material.
    Type: Grant
    Filed: March 12, 1981
    Date of Patent: February 8, 1983
    Assignee: Ford Motor Company
    Inventors: Shaun L. McCarthy, John J. Lambe
  • Patent number: 4371806
    Abstract: In the exemplary embodiments, the luminescent layer is applied to a carrier exhibiting a grid which is applied in the manner known per se in applying photo grids. Thereby, however, it is disadvantageous that the grid interstices exhibit only a small depth, so that the grid structure disappears as the luminescent layer is applied with increasing thickness. In order to avoid this disadvantage, the disclosure provides that the carrier also be etched after application of the grid, so that the grid interstices receive the shape of enlarged recesses of greater depth. The luminescent layer applied to this grid then retains the grid-like interruptions even given a greater thickness. An inventive luminescent screen receives improved image transmission properties and is particularly suited for employment as an X-ray (image intensifier) luminescent screen in medical X-ray diagnostics.
    Type: Grant
    Filed: July 18, 1980
    Date of Patent: February 1, 1983
    Assignee: Siemens Aktiengesellschaft
    Inventors: Werner Bintig, Hermann Christgau
  • Patent number: 4371809
    Abstract: In a controlled-porosity dispenser cathode of the type which has a foil w a plurality of holes covering the emitting material so that emitting material is dispensed through the holes to the electron-emitting surface of the foil and electrons are actually emitted through the holes and a small area surrounding each hole, a non-emitting shadow grid is laid down on the surface of the foil in such a configuration that it does not obstruct any of the emitting holes, has the same shape as the control grid, and is substantially in precise registration with the control grid.
    Type: Grant
    Filed: June 19, 1980
    Date of Patent: February 1, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Richard E. Thomas, George A. Haas, Richard F. Greene
  • Patent number: 4370590
    Abstract: A method for storing data in an archival memory semiconductor target by providing a masking layer of a conductive material on the surface of an insulative layer upon the top surface of a semiconductor substrate; the material layer is assigned a two-dimensional array of possible data storage sites. The masking layer at those storage sites at which a first binary value is to be stored, is melted; the selected material is one which, at the melting temperature thereof, does not wet the surface of the chosen insulator whereby apertures are formed by the writing electron beam in the masking layer, at energy levels insufficient to evaporate the masking material. The writing beam energy is reduced at the data sites at which data bits of the remaining binary value are to be stored, and does not melt the masking material thereat.
    Type: Grant
    Filed: September 25, 1980
    Date of Patent: January 25, 1983
    Assignee: General Electric Company
    Inventor: Harold F. Webster
  • Patent number: 4370591
    Abstract: In a color picture tube especially incorporating an in-line dot type shadow mask, the horizontal arrangement of the apertures of the shadow mask is determined to make substantially equal the interdistance between adjacent electron beams formed on the fluorescent screen based on beams of electron passing through apertures at the corners of the shadow mask, thereby making full use of the purity tolerance.
    Type: Grant
    Filed: August 18, 1980
    Date of Patent: January 25, 1983
    Assignee: Hitachi, Ltd.
    Inventor: Yoshio Satoh
  • Patent number: 4370594
    Abstract: An electron gun includes two electrodes between which a resistive lens structure is mounted. The lens structure comprises a stack of alternate apertured electrode plates and insulator spacer blocks. A high resistance coating of, e.g., cermet or glaze material, is disposed along one side of the stack so that it contacts a side of each spacer block and an edge of each apertured electrode plate.
    Type: Grant
    Filed: November 29, 1978
    Date of Patent: January 25, 1983
    Assignee: RCA Corporation
    Inventor: Philip Kuzenetzoff
  • Patent number: 4370587
    Abstract: In a lamp/reflector unit according to the invention the pinch seal (6) of an electric lamp (4) is enclosed laterally between moulded members (10, 11) and accommodated with said moulded members (10, 11) in the necked portion (2) of a reflector body (1). The surface of the pinch seal (6) has a groove (12) which is in engagement with rib (13) on one of the moulded members (10) and keeps the lamp (4) locked against axial movement. The necked portion (2) of the reflector body (1) keeps the lamp (4) with the moulded members (10, 11) fixed.
    Type: Grant
    Filed: November 21, 1980
    Date of Patent: January 25, 1983
    Assignee: U.S. Philips Corporation
    Inventor: Victor R. Notelteirs
  • Patent number: 4369393
    Abstract: An electroluminescent display which includes a thin film layer of a material which, if undue current passes through a portion of it, that portion is converted from a semiconductor into an insulator.
    Type: Grant
    Filed: November 28, 1980
    Date of Patent: January 18, 1983
    Assignee: W. H. Brady Co.
    Inventor: Norman J. Frame
  • Patent number: 4367428
    Abstract: Mains voltage halogen incandescent lamps according to the invention have at least one metal foil (25) incorporated in the pinch seal (22) of the lamp envelope (21) which extends into the cavity (23) enclosed by the lamp envelope (1) and is connected to an internal current conductor (29) situated entirely within said cavity (23). The lamps furthermore have a non-current-carrying supporting member (31) for said internal current conductor (29) which is embedded in the pinch seal (22) at a distance from the metal foil (25).
    Type: Grant
    Filed: January 23, 1981
    Date of Patent: January 4, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Victor R. Notelteirs, Gustaaf F. R. Siaens
  • Patent number: 4367556
    Abstract: In a rotary anode X-ray tube, comprising an anode disc which is mounted on a rotary shaft and which comprises a basic body of graphite, the anode disc is subject to such loads during the operation of the X-ray tube that a connection between the disc and the shaft is liable to fracture if it consists of pressed and sintered graphite. In order to counteract fracturing, the basic body is connected to the shaft by a bushing of pyrolytic or microporous graphite. A pyrolytic graphite bushing may be formed by deposition from the gaseous phase in situ or on a mandril, and should have a radial direction of growth. Both materials have a high strength and, moreover, a lower thermal conductivity in the radial direction. As a result, not only is the strength improved, but the thermal loading of the shaft bearings is also reduced.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: January 4, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Horst Hubner, Bernhard Lersmacher