Patents Represented by Attorney L. Greenspan
  • Patent number: 4427918
    Abstract: Focusing color-selection structure comprises a metal plate having an array of apertures therethrough arranged in substantially parallel columns with ridges of plate metal between the columns, the ridges being integral with and upstanding from one major surface of the plate, and at least as high as the plate is thick; an electrically-insulating layer over the tops of each of the ridges; and an electrically-conducting layer over each electrically-insulating layer.
    Type: Grant
    Filed: January 26, 1981
    Date of Patent: January 24, 1984
    Assignee: RCA Corporation
    Inventor: Steven A. Lipp
  • Patent number: 4425377
    Abstract: In a method of fabricating a cathode-ray tube, a layer comprising graphite, iron oxide, amorphous carbon and silicate binder is deposited on at least a portion of the interior surface of an envelope, the coating is baked in air until the amorphous carbon is substantially entirely gasified, and then the envelope is evacuated of gases and sealed.
    Type: Grant
    Filed: July 22, 1981
    Date of Patent: January 10, 1984
    Assignee: RCA Corporation
    Inventors: Samuel B. Deal, Donald W. Bartch
  • Patent number: 4410310
    Abstract: While a CRT is being baked at temperatures up to about 450.degree. C. and exhausted of gases prior to sealing, the mount assembly is heated to higher temperatures with RF energy. In the novel method, a selected portion of the mount assembly is shielded from the RF energy in such manner that it is not heated above about 350.degree. C.
    Type: Grant
    Filed: April 23, 1981
    Date of Patent: October 18, 1983
    Assignee: RCA Corporation
    Inventor: Jack C. Halbrook
  • Patent number: 4408851
    Abstract: A method for printing a viewing-screen structure including projecting, at least three times, a light field from a light source, through a lens, an optical filter and incident upon a photosensitive layer. During one of the projecting steps, the light source and the nominal axes of the light source, the lens, the filter and the layer (which are substantially parallel to one another) are aligned along a common axis. During each of the other two projecting steps, the light source and the axis of the lens remain aligned along the common axis, and the axes of the filter and the layer are offset prescribed distances on opposite sides of the common axis.
    Type: Grant
    Filed: May 19, 1982
    Date of Patent: October 11, 1983
    Assignee: RCA Corporation
    Inventors: Thomas L. Chase, George M. Ehemann, Jr.
  • Patent number: 4409279
    Abstract: A glass support rod comprising a generally rectangular glass body with flat ends, at least two opposite edges at each of said ends having radii of at least about 0.375 millimeter (15 mils).
    Type: Grant
    Filed: March 1, 1982
    Date of Patent: October 11, 1983
    Assignee: RCA Corporation
    Inventor: John R. Hale
  • Patent number: 4406639
    Abstract: In the novel method, before an electron-gun mount assembly is sealed into the neck of a CRT, at least the high-voltage electrodes and the adjacent portions of the focus electrodes are dipped into an aqueous solution consisting essentially of hydrogen peroxide and water. The solution contains substantially more than 10, and preferably about 30 to 50, weight percent of hydrogen peroxide.
    Type: Grant
    Filed: September 29, 1981
    Date of Patent: September 27, 1983
    Assignee: RCA Corporation
    Inventor: Robert H. Williams
  • Patent number: 4406637
    Abstract: Before a CRT is tipped off following exhaustion of gases to a low pressure, at least a portion of one of the electrodes of the mount assembly (e.g., the grid electrode facing the anode) is heated to high temperatures, preferably about 700.degree. to 800.degree. C., in an atmosphere having a partial pressure of oxygen.
    Type: Grant
    Filed: July 2, 1981
    Date of Patent: September 27, 1983
    Assignee: RCA Corporation
    Inventor: Karl G. Hernqvist
  • Patent number: 4403547
    Abstract: A shallow depression in a printing plate is filled with a viscous printing medium. Then, a transfer surface having the desired geometric pattern contacts the printing medium and thereby coats the surface with the medium. The coated transfer surface is then contacted with a receiving surface whereby medium in the desired pattern is transferred to the receiving surface. This method can be practiced with the same plate and at the same time as another, different transfer printing method.
    Type: Grant
    Filed: December 7, 1981
    Date of Patent: September 13, 1983
    Assignee: RCA Corporation
    Inventor: Steven C. Forberger
  • Patent number: 4401508
    Abstract: In a method for removing insolubilized polyvinyl alcohol portions from the surface of a body on which it is adhered, the step of contacting said stencil and surface with an aqueous stripping solution containing at least one nonoxidizing mineral acid, such as hydrochloric acid and phosphoric acid, in concentration that is effective to remove said portions with at most light mechanical action.
    Type: Grant
    Filed: October 27, 1982
    Date of Patent: August 30, 1983
    Assignee: RCA Corporation
    Inventor: Peter M. Ritt
  • Patent number: 4395242
    Abstract: In the novel method of electrically processing a completed and operative CRT, the portion of the focus electrode that faces a high-voltage electrode is heated at temperatures above about 700.degree. C. and then is subjected to RF spot-knocking. The novel method can be applied during the initial processing of the CRT and/or subsequently during a reprocessing procedure.
    Type: Grant
    Filed: August 19, 1981
    Date of Patent: July 26, 1983
    Assignee: RCA Corporation
    Inventors: Paul R. Liller, Donald J. Shahan
  • Patent number: 4389279
    Abstract: A method of etching a continuous etchable metallic strip from both major surfaces to produce a multiplicity of apertures therethrough, said strip having, on both major surfaces, acid-resistant stencils with openings therein that are registered with one another. The method comprises moving the strip through an etching chamber, spraying liquid etchant toward both of said major surfaces and shielding one of the major surfaces from sprayed liquid etchant during the initial portion of the spraying step. Shielding is achieved by interposing a stationary wall opposite to and spaced from the shielded surface and providing continuous side seals between the wall and the edge portions of the strip.
    Type: Grant
    Filed: June 23, 1982
    Date of Patent: June 21, 1983
    Assignee: RCA Corporation
    Inventors: Donald M. Weber, Raymond A. Alleman
  • Patent number: 4377890
    Abstract: A CRT has a unique, machine-readable, coded marking in an external surface thereof. Assembling the CRT includes (1) providing at least one envelope part having a unique, machine-readable coded marking on an external surface thereof, (2) machine-reading the marking, (3) generating a signal in response to step (2) and, (4) in response to the signal, initiating a local process for action with respect to the envelope part. The action may include transportation of the part, assembly of other parts or subassemblies to the part, or testing of an assembly including the part.
    Type: Grant
    Filed: August 10, 1981
    Date of Patent: March 29, 1983
    Assignee: RCA Corporation
    Inventor: William R. Miller
  • Patent number: 4376009
    Abstract: In a method for preparing an integral cathode substrate and support in which selected surface portions of a formed metal part are masked, the unmasked surface portions etched, and then the mask removed, the improvement wherein the etching step is conducted by alternately directing a solid limp stream of liquid etchant into and out of contact with the part while permitting the liquid etchant to drain away from the part by gravity.
    Type: Grant
    Filed: April 29, 1982
    Date of Patent: March 8, 1983
    Assignee: RCA Corporation
    Inventor: Peter J. Kunz
  • Patent number: 4374451
    Abstract: The method of assembling a CRT includes (1) providing at least one envelope part having a unique, optically machine-readable, process-survivable coded marking on an external surface thereof, (2) optically machine-reading the marking, (3) generating a signal in response to step (2), (4) in response to the signal, initiating a local process for action with respect to the envelope part and (5) recording data of the local process with reference to said coded marking. The action may include transportation of the part, assembly of other parts or subassemblies to the part, or testing of an assembly including the part.
    Type: Grant
    Filed: August 10, 1981
    Date of Patent: February 22, 1983
    Assignee: RCA Corporation
    Inventor: William R. Miller
  • Patent number: 4374037
    Abstract: A method for preparing a divalent-europium-activated calcium sulfide phosphor comprising reacting a molten mixture consisting essentially of alkaline-earth-metal chloride and europium chloride with gaseous carbon disulfide at temperatures between 850.degree. and 1200.degree. C. for 1 to 6 hours. The molten mixture may include activator proportions of cerium and/or alkali metal cations. Minor proportions of calcium may be replaced with one or more other alkaline-earth-metal cations.
    Type: Grant
    Filed: June 23, 1982
    Date of Patent: February 15, 1983
    Assignee: RCA Corporation
    Inventor: Tatsuo Takahashi
  • Patent number: 4370287
    Abstract: To synthesize a particulate phosphor, an intimate dry mixture of phosphor-producing compounds is pressed, as by uniaxial or isostatic pressing, to a self-supporting preform of the desired shape and to a prescribed density. Then, the preform is heated to a reaction temperature and cooled to produce a friable cake of phosphor particles. The cake is broken apart, and the phosphor particles are washed and dried.
    Type: Grant
    Filed: March 20, 1981
    Date of Patent: January 25, 1983
    Assignee: RCA Corporation
    Inventor: Robert P. Thompson
  • Patent number: 4353006
    Abstract: A CRT comprising an evacuated envelope having an electrically-insulating neck and a beaded electron-gun mount assembly in the neck. The beads of the assembly are closely spaced from the inner surface of the neck. At least a portion of the surface of each of the beads opposite the neck carries a patch of chromium oxide.
    Type: Grant
    Filed: May 28, 1980
    Date of Patent: October 5, 1982
    Assignee: RCA Corporation
    Inventor: Horst E. P. Schade
  • Patent number: 4350922
    Abstract: CRT comprises a color-selection structure for producing a plurality of quadrupolar lenses, each lens defining a window for passing and focusing portions of electron beams to an associated color group of a target. The color-selection structure comprises (i) a metal masking plate having therein an array of substantially rectangular windows, each window having associated therewith (ii) a pair of first conductors insulatingly spaced from one major surface of the plate and located adjacent opposite sides of the aperture and (iii) a pair of second conductors insulatingly spaced from the other major surface of the plate and located adjacent opposte sides of the window. The CRT includes means for applying a voltage to said plate, means for applying a voltage to said pairs of first conductors and means for applying a voltage to said pairs of second conductors.
    Type: Grant
    Filed: June 20, 1980
    Date of Patent: September 21, 1982
    Assignee: RCA Corporation
    Inventors: Carmen A. Catanese, Stanley Bloom
  • Patent number: 4348299
    Abstract: Method for preparing an inorganic sulfide material including heating at temperatures between about 800.degree. and 1200.degree. C. a mixture comprising at least one member of the group consisting of oxidic materials of calcium, strontium and combinations thereof with a reactive sulfurizing flux which yields sulfides and polysulfides upon heating until the flux melts, reacts with the oxidic material, and the mixture forms into a molten mass. Then, cooling the mass to room temperature whereby relatively water-insoluble particles of the desired sulfide material crystallize in a relatively water-soluble matrix. The sulfide material may be separated by dissolving away the matrix in water and collecting the particles of sulfide material.
    Type: Grant
    Filed: November 4, 1981
    Date of Patent: September 7, 1982
    Assignee: RCA Corporation
    Inventors: Fumio Okamoto, Katsuhiro Kato
  • Patent number: 4341591
    Abstract: Method comprises providing a blank laminate consisting essentially of a positive-acting photosolubilizable central layer, first and second etchable metal layers adhered to opposite sides of the central layer and first and second etch-resistant stencils contacting the outer major surfaces of the first and second metal layers. The stencils have different, related open areas therethrough which leave selected portions of the metal layers unprotected. The unprotected portions of the first and second metal layers are etched through, thereby producing first and second openings in the metal layers. Then the central layer is exposed to actinic light through the first and/or second openings, thereby solubilizing selected portions of the central layer, which solubilized portions are then removed.
    Type: Grant
    Filed: April 8, 1981
    Date of Patent: July 27, 1982
    Assignee: RCA Corporation
    Inventor: Donald J. Tamutus