Patents Examined by Robert Segal
  • Dual layer phosphor screen for cathode ray tube
    Patent number: 4204136
    Abstract: A cathode ray tube is described having a high brightness, high resolution cathodoluminescence screen which exhibits a low noise level. Two discrete phosphor layers are provided on the interior of the tube faceplate. A thin electrophoretically deposited first phosphor layer of very finely divided phosphor is disposed upon the interior surface of the tube faceplate. A second gravity settle phosphor layer is disposed over the first phosphor layer.
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: May 20, 1980
    Assignee: Westinghouse Electric Corp.
    Inventor: Donald M. Phillips
  • Spring-loaded resistor terminal
    Patent number: 4199706
    Abstract: This disclosure depicts structure and method for terminating an electrical resistor for a television CRT which could be used for arc suppression, voltage division or the like. The structure is disclosed in a preferred form as comprising a cylindrical rod of predetermined length, diameter and resistance. On at least one end of the rod, an electrically conductive coil spring is constricted in firm electrical and mechanical connection with said rod. At least a number of the turns of the spring are mechanically joined to prevent the spring from being torsionally stressed open so as to release the rod. Also disclosed is a method of making an electrical-mechanical termination.
    Type: Grant
    Filed: September 2, 1977
    Date of Patent: April 22, 1980
    Assignee: Zenith Radio Corporation
    Inventors: Valentijn B. Bing, Donald A. Neis
  • Electron multiplier input electron optics
    Patent number: 4199702
    Abstract: An ion feedback electron multiplier has an envelope containing an ionizable gas. Within the envelope is a chain of multiplier dynodes divided into two planar groups spaced from and parallel to one another. At one end of the multiplier chain is an electron source capable of emitting electrons upon ion bombardment. An electron lens which is between the multiplier chain and the electron source, focuses the electrons from the source onto one of the dynodes of the multiplier.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: April 22, 1980
    Assignee: RCA Corporation
    Inventor: Scott A. Keneman
  • Electro-optic display device
    Patent number: 4198124
    Abstract: In a sandwich type electro-optic display device which includes a transparent conductive substrate, an electrochromic layer (e.g. tungsten oxide applied to the substrate), a counterelectrode spaced from the electrochromic layer and a conductive medium, e.g. an acidic liquid ion conductive medium (sulfuric acid-glycerine solution) located in the space between the two electrodes; a protective layer deposited in situ on the electrochromic layer resulting from the doping of the liquid electrolyte with a salt of a cation having an ionic radius no less than 0.99 Angstrom units according to the classification of Pauling. Soluble isopolytungstic acid is formed at the interface between the electrochromic layer and the conductive medium as an "interfacial layer". The great cation salt selected is Ba.sup.
    Type: Grant
    Filed: February 14, 1977
    Date of Patent: April 15, 1980
    Assignee: Ebauches, S.A.
    Inventor: Jacques Cognard
  • Color CRT shielding cone having four metal plates extending from corners of smaller aperture to wall coating
    Patent number: 4198587
    Abstract: A color display tube having a magnetic screening cap provided with four resilient metal plates extending radially in the direction of the corner points of the display screen at the edge of the end of the cap having the smallest diameter. The plates press against the electrically conductive inner coating of the cone and which would otherwise prevent electrons pass between the screening cap and the conductive inner coating of the cone from impinging upon the display screen.
    Type: Grant
    Filed: October 20, 1978
    Date of Patent: April 15, 1980
    Assignee: U.S. Philips Corporation
    Inventors: Martinus C. M. Verhoeven, Andrianus M. Kersten, Giovanni Serio
  • Isochronous cyclotron
    Patent number: 4197510
    Abstract: A solenoid comprising several, discrete, coaxial, circular, superconducting coils provides a magnetic field which decreases radially to an absolute minimum intensity to focus the ions as they are accelerated to the end of the non-relativistic velocity range. As the ions are further accelerated to relativistic velocities, the magnetic field increases radially from the absolute minimum intensity to compensate for the relativistic increase in mass. The revolving ions are accelerated by repeated passage through an electric field which is established in radially-directed resonator horns. The accelerating structure and the associated electric field reinforce the focusing provided by the radially-increasing magnetic field.
    Type: Grant
    Filed: June 23, 1978
    Date of Patent: April 8, 1980
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Harold H. Szu
  • Television camera tube with conductive or secondary emissive region between window seal and mesh
    Patent number: 4196369
    Abstract: In order to avoid picture disturbances by electric charging phenomena on the tube wall in a camera tube in which no target material is present on the inner wall of the cylinder tube, the tube wall is provided with a surface potential stabilizing material between the window connection and the mesh electrode of the camera tube. This stabilization can be realized by way of a local cover layer having the desired electric conductivity or secondary emission properties, or by locally adapting properties of the glass of the tube wall thereto.
    Type: Grant
    Filed: April 8, 1977
    Date of Patent: April 1, 1980
    Assignee: U.S. Philips Corporation
    Inventors: Jacob H. Geus, Louis M. Swart
  • CRT generating three inline beams and having shunts for weakening center beam horizontal magnetic deflection and strengthening vertical deflection
    Patent number: 4196370
    Abstract: An inline electron gun includes means for weakening the effect of a portion of the horizontal magnetic deflection field on the center electron beam and for strengthening the effect of a portion of the vertical magnetic deflection field on the center electron beam. The means includes magnetic shield members completely surrounding the paths of the outer beams. Each of the members has a portion that crosses the plane of the co-planar electron beam paths that is closer to the center beam path than to the outer beam paths. In a preferred embodiment, large shunts surrounding the outer beams are offset eccentrically toward the center beam relative to the outer beams.
    Type: Grant
    Filed: February 24, 1978
    Date of Patent: April 1, 1980
    Assignee: RCA Corporation
    Inventor: Richard H. Hughes
  • Color picture tube having improved corrugated mask
    Patent number: 4195248
    Abstract: An improvement is provided in an apertured mask type color picture tube having a substantially flat faceplate, a cathodoluminescent screen on the faceplate, a corrugated apertured mask adjacent the screen and electron gun means for producing and directing a plurality of electron beams through the mask to impinge upon the screen. The mask corrugations are substantially parallel and extend in a first direction with the varying corrugated waveform extending in a second direction. The mask includes an aperture width and/or an aperture-to-aperture spacing variation in the second direction which is a function of mask-to-screen spacing.
    Type: Grant
    Filed: September 8, 1978
    Date of Patent: March 25, 1980
    Assignee: RCA Corporation
    Inventors: Ralph J. D'Amato, Robert P. Stone
  • Beam-indexing color image-presentation cathode ray tube
    Patent number: 4194140
    Abstract: A beam-indexing color image-presentation cathode ray tube comprises color-phosphor stripes arranged in a regular order and differently responsive to impingement by electron beams to produce light of different colors and index-phosphor stripes arranged to have a predetermined geometric relation to the color-phosphor stripes and responsive to impingement by the electron beams to produce index signals, in which the index-phosphor stripes comprises a first index-phosphor stripe, a second index-phosphor stripe and a third index-phosphor stripe, the pitch of the second index-phosphor stripe is three times as large as the pitch of the third index-phosphor stripe, and the first index-phosphor stripe is wider in its width than the second index-phosphor stripe.
    Type: Grant
    Filed: March 23, 1978
    Date of Patent: March 18, 1980
    Assignee: Tokyo Shibaura Electric Co., Ltd.
    Inventors: Eizaburo Hamano, Tetsuo Komatsu
  • Electron gun shield cup providing tube evacuation bypass vents
    Patent number: 4193016
    Abstract: This disclosure depicts for use in a television picture tube having a bulb with a neck at the rear end thereof, a novel electron gun located in closely confined relationship in the neck. The gun has at least one cathode having an electron emissive coating, an apertured, substantially diamond-shaped shield cup with truncated corners and a plurality of electrodes interspaced between the cathode and the shield cup. The tube is characterized by the shield cup having one or more inward formations at one or more spaced locations around its periphery. The inward formations of the shield cup function to define one or more openings between the shield cup and the inner wall of the neck which act as cathode-erosion-suppressing by-pass vents during tube evacuation, and/or provide augmented deflection space for contact springs attached to selected opposite ones of said corners.
    Type: Grant
    Filed: October 4, 1977
    Date of Patent: March 11, 1980
    Assignee: Zenith Radio Corporation
    Inventor: H. Rudolf Zeidler
  • Display arrangements
    Patent number: 4193014
    Abstract: An addressable display in which data is presented in the form of a rectangular dot array is provided by means of an evacuated cathode ray tube, which enables large bright displays to be achieved. The cathode ray tube contains two segmented mesh electrodes each consisting of separately addressable stripes. Electrons from a flood gun are passed by both electrodes only at the crossing point of two stripes, one on each electrode, when predetermined potentials are applied to them.
    Type: Grant
    Filed: June 9, 1977
    Date of Patent: March 11, 1980
    Assignee: English Electric Valve Company Limited
    Inventor: Ralph D. Nixon
  • Compact single-ended fluorescent lamp having a partitioned envelope
    Patent number: 4191907
    Abstract: A fluorescent light source of small physical size and high brightness is provided by making the vitreous envelope of cylindrical configuration and providing it with an inserted partition assembly that is coated with phosphor and longitudinally extends from the hermetically sealed end of the envelope to its flat end wall or face. The partition assembly preferably comprises a series of radiallyextending sheet metal panels that divide the envelope interior into a series of interconnected sectors that define a discharge channel which forces the discharge to follow a retroverted path through the envelope. One end of the partition assembly is seated against the flat end wall of the envelope and its opposite end is seated in keyed interlocked relationship with a disc-like support member that is held in place by the lead-in conductors and has channels which receive the ends of the partition panels.
    Type: Grant
    Filed: September 21, 1978
    Date of Patent: March 4, 1980
    Assignee: Westinghouse Electric Corp.
    Inventor: Gerald L. Rogoff
  • Cathode structure for a high power laser
    Patent number: 4189656
    Abstract: A cathode structure for a high power laser is formed from a first sheet of a hard metallic material such as molybdenum, which is joined to a second sheet of the same material by brazing, these first two sheets being brazed to a support structure of the same material. The first two sheets have a plurality of side by side longitudinal channels formed therein, the channels of one of these sheets being positioned between the channels of the other sheet (in a 180.degree. spatial phase relationship therewith). Crosswise channels are provided along opposite edges of both of the sheets to provide fluid communications to the opposite ends of the longitudinal channels. A cooling liquid such as water is fed to the transverse channels, and circulated through the longitudinal channels in parallel to effect efficient cooling of the cathode.
    Type: Grant
    Filed: May 12, 1978
    Date of Patent: February 19, 1980
    Assignee: Northrop Corporation
    Inventors: Vahram W. Biricik, Kang R. Chun, Laurence S. Gresko
  • Color-television picture tube with internal permanent magnets for convergence correction
    Patent number: 4189659
    Abstract: An in-line color-television picture tube wherein purity adjustment, vertical pincushion correction, and static convergence correction are performed by magnetic fields produced by permanent magnets acting on the beams.
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: February 19, 1980
    Assignee: International Standard Electric Corporation
    Inventors: Wolfram Andre, Hans Muller
  • Cathode ray tube having low resistance contact area beneath high voltage contact spring
    Patent number: 4188564
    Abstract: A color television display tube having color selection means connected electrically by at least one metal contact spring to a resistive layer provided on the inner surface of the envelope of the tube. A low resistance contact face is applied on the resistive layer between the spring and the layer to reduce the contact resistance therebetween, thereby reducing undesirable interference radiation transmitted by the tube.
    Type: Grant
    Filed: May 26, 1978
    Date of Patent: February 12, 1980
    Assignee: U.S. Philips Corporation
    Inventors: Antonius P. F. Zegers, Johannes M. A. A. Compen
  • Cathode ray tube having an electron lens system including a meshless scan expansion post deflection acceleration lens
    Patent number: 4188563
    Abstract: A cathode ray tube includes first and second electrostatic quadrupole lens between the electron gun and the vertical deflection plates to properly focus the electron beam before it enters the vertical deflection plates. A third electrostatic quadrupole lens is located between the vertical deflection plates and the horizontal deflection plates to enhance the angle of deflection as well as to properly focus the electron beam as it moves from the vertical deflection plates into the horizontal deflection plates. A meshless scan expansion lens follows the horizontal deflection plates and is formed of aligned tubular members having interdigitated sections thereby forming a fourth quadrupole lens which accelerates the electron beam and expands it prior to being impinged onto the fluorescent screen.
    Type: Grant
    Filed: August 31, 1978
    Date of Patent: February 12, 1980
    Assignee: Tektronix, Inc.
    Inventor: Bozidar Janko
  • Flanged cylindrical electron multipliers
    Patent number: 4188560
    Abstract: Electron Multiplier in which the charge current is conformed by an electrostatic field to pass in alternating fashion between successive dynode surfaces of two opposed rows, the dynodes of one row being on outer surfaces of coaxial cylindrical elements and the dynodes of the other row being on inner surfaces of surrounding annular elements.
    Type: Grant
    Filed: August 25, 1978
    Date of Patent: February 12, 1980
    Assignee: Commonwealth Scientific and Industrial Research Organization
    Inventor: Donald L. Swingler
  • Shadow mask having vertical pitch about 8/(2n-1) times horizontal pitch
    Patent number: 4186326
    Abstract: A color picture tube, wherein a set of three electron beams emitted from respective three electron-emitting members of an electron gun, or from respective three electron guns, is projected onto a screen, and sets of each three luminous strips on this screen are selectively energized to emit luminous color lights, characterized in that the numeral ratios between said luminous strips by pieces and said slots of the shadow mask, respectively, are about 1:1 vertically and about 3:1 horizontally, and also that every strip as well as its set is complete insulated from adjacent strips and their sets by a light-absorbent film filling all the gaps inbetween.With such construction, a color picture tube having excellent brightness and contrast characteristic, being free from disturbing vertical strips, has been obtained.
    Type: Grant
    Filed: October 19, 1978
    Date of Patent: January 29, 1980
    Assignee: Matsushita Electronics Corporation
    Inventor: Kakuichiro Hosokoshi
  • Spray gun for a direct-vision image storage tube and an image-storage tube using this gun
    Patent number: 4185226
    Abstract: A quadripolar lens incorporated in the spray gun of direct vision image storage tubes enables the density of electrons in the spray beam to be controlled, over a wide range, by acting on the potential of the control grid of the gun, without varying the acceleration potentials.
    Type: Grant
    Filed: March 23, 1978
    Date of Patent: January 22, 1980
    Assignee: Thomson-CSF
    Inventor: Roger Heymann