Patents Represented by Attorney L. Greenspan
  • Patent number: 4567400
    Abstract: A CRT comprising an evacuated envelope having an electrically-insulating neck and a beaded electron-gun mount assembly in the neck. Portions of the surfaces of the beads facing the inner surface of the neck carry electrically-conducting coatings for suppressing arcing during the operation of the tube. The coatings and the claws of the electrodes embedded in the beads are positioned to minimize erosion of the patches during electrical processing of the electrodes.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: January 28, 1986
    Assignee: RCA Corporation
    Inventor: Stephen T. Opresko
  • Patent number: 4504430
    Abstract: Method for casting a base directly on an electron tube comprising a stem and stem leads sealed in and extending out from the stem includes: A. detachably coupling a mold to the leads and stem, B. producing a temporary pressure seal between the mold and the stem including applying static pressure in a direction that is substantially normal to the surface of the stem and C. injecting liquid castable material into the mold at substantial hydraulic pressure while maintaining the static pressure at the temporary seal.
    Type: Grant
    Filed: May 16, 1983
    Date of Patent: March 12, 1985
    Assignee: RCA Corporation
    Inventor: Myron H. Wardell, Jr.
  • Patent number: 4500808
    Abstract: A multibeam electron gun comprising two spaced successive electrodes individually held in position from a common support. One electrode comprises a single metal first plate having at least three electron-beam-defining first apertures therein. The other electrode is a composite structure comprising (a) a single metal second plate having a window therein opposite each of said first apertures and (b) a separate metal third plate attached to said second plate closing each of the windows. The third plate has a single electron-beam-defining second aperture therein separately aligned with one of the first apertures.
    Type: Grant
    Filed: April 2, 1982
    Date of Patent: February 19, 1985
    Assignee: RCA Corporation
    Inventor: Harry E. McCandless
  • Patent number: 4497848
    Abstract: Method and apparatus are described for producing a unique machine-readable marking, such as a bar-code marking, on each of a succession of workpieces, such as glass envelope parts of cathode-ray tubes. The method comprises producing and applying a different unique stencil for each workpiece and then applying a suitable paint through the stencil.
    Type: Grant
    Filed: October 28, 1983
    Date of Patent: February 5, 1985
    Assignee: RCA Corporation
    Inventor: Anthony S. Baran
  • Patent number: 4493668
    Abstract: A method for fabricating a CRT (cathode-ray tube) in which a partially-completed faceplate-panel assembly is baked-out and heat-sealed to a funnel during the same baking cycle. Jets of oxygen-containing gas are directed intermittently into the open neck of the funnel at least during the heating-up period of the heating cycle.
    Type: Grant
    Filed: January 17, 1983
    Date of Patent: January 15, 1985
    Assignee: RCA Corporation
    Inventors: Joseph J. Piascinski, Randolph H. Axelrod, James Mount
  • Patent number: 4488793
    Abstract: Method for photodepositing a CRT screen structure including projecting a light field through an IC filter having tailored light transmission, through a photographic master and incident upon a photosensitive layer. The IC filter is a half-tone comprising an array of discrete spaced-apart opaque elements of predetermined sizes arranged along parallel spaced-apart lines.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: December 18, 1984
    Assignee: RCA Corporation
    Inventor: George M. Ehemann, Jr.
  • Patent number: 4485158
    Abstract: In a method for preparing a mosaic luminescent screen, islands of dry precoating material are adhered to a glass support surface at the sites of the mosaic parts of the screen. Then, the mosaic parts of the screen are deposited on the islands by the slurry-direct photographic method, including development with a turbulent aqueous developing medium. The use of islands provides the necessary adherence during development of the mosaic parts with a substantial reduction in the amount of precoating that must later be removed.
    Type: Grant
    Filed: October 17, 1983
    Date of Patent: November 27, 1984
    Assignee: RCA Corporation
    Inventor: Stanley A. Harper
  • Patent number: 4482426
    Abstract: A method for etching a strip of iron-nickel alloy, such as invar steel, having etch-resistant stencils on opposite major surfaces thereof includes contacting the stencilled surfaces with a ferric-chloride etchant. The etchant is controlled (a) to contain not more than 5 molar percent nickel ion with respect to the total content of nickel and iron ions, (b) to have a specific gravity greater than about 1.495 (48.degree. Baume) (c) and to have a temperature greater than 70.degree. C.
    Type: Grant
    Filed: April 2, 1984
    Date of Patent: November 13, 1984
    Assignee: RCA Corporation
    Inventors: Richard B. Maynard, John J. Moscony, Margaret H. Saunders
  • Patent number: 4473008
    Abstract: In an intaglio printing method, the steps of providing a novel intaglio inking plate having a surface and means for producing different prescribed patterns of shallow depressions therein, producing a first prescribed pattern of depressions in said surface, filling said depressions with ink, transferring ink from the pattern of filled depressions to a transfer surface, altering the surface to provide a second pattern of shallow depressions therein and then repeating the step of filling the depressions with ink and transferring an ink pattern to a transfer surface.
    Type: Grant
    Filed: September 20, 1983
    Date of Patent: September 25, 1984
    Assignee: RCA Corporation
    Inventor: Philip M. Heyman
  • Patent number: 4473774
    Abstract: CRT (cathode-ray tube) comprises an evacuated glass envelope, an electron-gun mount assembly housed in the envelope, the electrodes of said envelope being confined by closely-spaced glass surfaces, and an insulative coating on said glass surfaces opposite electrodes of said mount assembly. The insulative coating is a substantially-continuous, noncrystalline film of a nonionic organic polymeric material.
    Type: Grant
    Filed: February 9, 1982
    Date of Patent: September 25, 1984
    Assignee: RCA Corporation
    Inventor: Karl G. Hernqvist
  • Patent number: 4464601
    Abstract: CRT employs a quadrupolar-focusing color-selection structure comprising two or more apertured masking plates. Each plate has therein an array of substantially rectangular apertures which are positioned relative to one another to produce electrostatic quadrupolar-focusing lenses when operating voltages are applied thereto. The color-selection structure may, by its geometry, provide at the same time electrostatic dipolar deflecting fields when operating voltages are applied.
    Type: Grant
    Filed: August 11, 1982
    Date of Patent: August 7, 1984
    Assignee: RCA Corporation
    Inventor: Stanley Bloom
  • Patent number: 4460621
    Abstract: The novel method comprises impacting an aqueous slurry of solid particles on the surface of a glass viewing window in such manner as to stress the glass in the impacted area of the window without substantial erosion, abrasion or etching of the impacted surface, and then etching the impacted surface with an aqueous fluoride etchant.
    Type: Grant
    Filed: November 21, 1983
    Date of Patent: July 17, 1984
    Assignee: RCA Corporation
    Inventor: Samuel Pearlman
  • Patent number: 4452861
    Abstract: Article of manufacture comprises a solid core particle individually encapsulated with a film consisting essentially of alkyl 2-cyanoacrylate polymeric material. The film may be produced in situ by agitating a mixture of core particles having adsorbed water on the surfaces thereof in a nonaqueous liquid containing dissolved alkyl 2-cyanoacrylate monomer, whereby the monomer and adsorbed water react and deposit the film on the surfaces of the particles.
    Type: Grant
    Filed: May 20, 1982
    Date of Patent: June 5, 1984
    Assignee: RCA Corporation
    Inventors: Fumio Okamoto, Katsuhiro Kato
  • Patent number: 4451725
    Abstract: Electrical heating unit for tipping-off vacuum electron tubes comprises a cylindrical resistance heating coil, a cylindrical heat-shielding means within and spaced from the heating coil and a support plate adjacent one end of the coil permitting leads of a vacuum tube to be positioned within the heat-shielding means. The heat-shielding means comprises a unitary member having a hollow cylindrical body, an outwardly-extending flange at one end of the body, and an inwardly-extending flange at the other end of said body adapted to support the leads of said vacuum tube with the tubulation of the tube extending therethrough. The body has a height that is less than the height of the longest lead of the vacuum tube.
    Type: Grant
    Filed: July 22, 1982
    Date of Patent: May 29, 1984
    Assignee: RCA Corporation
    Inventor: James Mount
  • Patent number: 4448612
    Abstract: A gaseous mixture of nitrogen and water vapor (dew point of about -8.degree. to 32.degree. C.), heated to 550.degree. to 750.degree. C., contacts the surfaces of a steel part for a sufficient time to produce adherent, deep-black layers on the part. Steel aperture masks and support frames for color television picture tubes may be blackened by the novel method.
    Type: Grant
    Filed: May 3, 1983
    Date of Patent: May 15, 1984
    Assignee: RCA Corporation
    Inventors: Chris W. Ebert, Earle S. Thall
  • Patent number: 4446362
    Abstract: A workpiece having a machine-readable coded marking abraded into the surface thereof. The marking comprises a plurality of related marks, such as bar-code marking, which have substantially different light reflectances than the surrounding surface. The markings may be made by moving a means for abrading a defined surface area along a particular path with respect to the surface to be marked. The abrading means is selectively activated or deactivated according to a prearranged program to selectively abrade the surface.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: May 1, 1984
    Assignee: RCA Corporation
    Inventor: Philip M. Heyman
  • Patent number: 4445872
    Abstract: In a method of vaporizing getter material from a getter container inside a vacuum electron tube, light from the vaporization is sensed at least from the outset of the heating of the container. A time-dependent sample signal is produced from the sensed light which is compared with time-dependent criteria related to the vaporization, and a characteristic of the vaporization is derived from the comparison.
    Type: Grant
    Filed: January 18, 1982
    Date of Patent: May 1, 1984
    Assignee: RCA Corporation
    Inventor: James G. Ottos
  • Patent number: 4443499
    Abstract: The novel method comprises (1) producing in one major surface of a metal masking plate an array of substantially-parallel ridges separated by valleys or grooves, (2) removing metal from the other of said major surfaces in generally rectangular-shaped areas opposite the valleys and extending through the plate, (3) covering the tops of the ridges with an electrically-insulating first coating and (4) covering the first coating with an electrically-conducting second coating.
    Type: Grant
    Filed: August 4, 1983
    Date of Patent: April 17, 1984
    Assignee: RCA Corporation
    Inventor: Steven A. Lipp
  • Patent number: 4441957
    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 masking step is conducted by pressing surface portions of an etch-resistant, compressible sheet against the selected surface portions of the part.
    Type: Grant
    Filed: November 25, 1980
    Date of Patent: April 10, 1984
    Assignee: RCA Corporation
    Inventors: Wayne R. Poff, Donald W. Bartch
  • 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