Patents Represented by Attorney Glenn H. Bruestle

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  • Method for extending cathode life in vidicon tubes
    Patent number: 4018489
    Abstract: By heating as many of the electrodes as possible in a vidicon tube during and after the cathode activation, the potentiality for gas contamination of the electrodes is greatly reduced and the life of the tube is extended.
    Type: Grant
    Filed: August 28, 1975
    Date of Patent: April 19, 1977
    Assignee: RCA Corporation
    Inventors: Louis Donald Miller, Hans Popp
  • Composition for making garnet films for improved magnetic bubble devices
    Patent number: 4018692
    Abstract: Garnet films suitable for bubble devices which are substituted with bismuth, aluminum or gallium and certain rare earth ions have improved magneto optic properties and can be formed at low temperatures on gadolinium gallium garnet substrates.
    Type: Grant
    Filed: March 13, 1975
    Date of Patent: April 19, 1977
    Assignee: RCA Corporation
    Inventors: Aline Akselrad, Richard Edwin Novak
  • Method of making a metallized video disc having an insulating layer thereon
    Patent number: 4018945
    Abstract: A polymeric film applied to a video disc by glow discharge techniques is treated with a subsequent glow discharge in air to improve wear properties.
    Type: Grant
    Filed: June 19, 1975
    Date of Patent: April 19, 1977
    Assignee: RCA Corporation
    Inventor: Robert Michael Mehalso
  • Method of setting cathode-G1 spacing
    Patent number: 4015315
    Abstract: In an electron gun assembly comprising at least one oxide coated cathode and a G1 grid, a method of spacing the cathode a predetermined distance from the G1 grid includes the following steps. First, the cathode oxide coating is moistened with water causing it to become electrically conductive. Next an ohmmeter is connected to indicate the electrical resistance between the electrically conductive oxide coating and the G1 grid. The spacing between the cathode and the G1 grid is then reduced until the ohmmeter indicates that there is electrical conductivity therebetween. At this point there is zero spacing between the cathode and the G1 grid. The spacing between the cathode and the G1 grid is then increased by an amount equal to the predetermined spacing. The cathode is then permanently fixed at the predetermined spacing with respect to the G1 grid.
    Type: Grant
    Filed: July 14, 1975
    Date of Patent: April 5, 1977
    Assignee: RCA Corporation
    Inventor: Robert Porter Stone
  • Deformable mirror light valve and method of operating the same
    Patent number: 4013345
    Abstract: A deformable mirror light valve includes a plurality of substantially transparent parallel electrodes which are disposed on one surface of a transparent substrate. The electrodes are electrically insulated from each other. A photoconductor layer is on the transparent electrodes and an elastomer layer is on the photoconductor layer. A deformable mirror is on the elastomer layer. The plurality of electrodes permit the biasing voltage for each area on the light valve to be optimally phased with respect to the scanning of that area. Consequently, the use of this device provides for a substantially uniform deformation intensity, i.e., read out intensity, over the entire area of the light valve.
    Type: Grant
    Filed: October 22, 1975
    Date of Patent: March 22, 1977
    Assignee: RCA Corporation
    Inventor: William Ronald Roach
  • Video disc stylus
    Patent number: 4013830
    Abstract: One end of a support structure of dielectric material tapers to a tip which has a curved bottom surface. A cermet film composed of a conductive material and a dielectric material which adheres well to the support structure is on a portion of the support structure's surface. The concentration of the constituent materials in the cermet film varies through its thickness. The cermet film at the interface with the support structure has a high concentration of dielectric material while the portion of cermet film at its exposed surface has a high conductive material concentration.
    Type: Grant
    Filed: May 19, 1975
    Date of Patent: March 22, 1977
    Assignee: RCA Corporation
    Inventors: Harry Louis Pinch, Herbert Irwin Moss
  • Liquid crystal module
    Patent number: 4012117
    Abstract: The module comprises a carrier on which a semiconductor chip is mounted, and a plurality of terminals to which various outputs of the chip are electrically connected, the terminals comprising metallized areas on one surface of the carrier. A liquid crystal cell is mounted within a frame including means for securing the frame to the carrier, resilient connector means being clamped between the liquid crystal cell and the carrier for electrically connecting different ones of the carrier terminals to different ones of electrodes of the cell.
    Type: Grant
    Filed: July 29, 1974
    Date of Patent: March 15, 1977
    Assignee: RCA Corporation
    Inventor: Angelo Gino Lazzery
  • Optical element for a laser
    Patent number: 4011524
    Abstract: An optical element for a laser, such as a mirror, includes a rectangular parallelepiped body of a material suitable for the element, such as glass, and a cylindrical projection extending from one surface of the body. The projection is smaller in area than the area of the surface of the body and the periphery of the projection is spaced from the edges of the surface. The edge of the surface of the projection is free of nicks or chips and serves as the mounting edge for the element in a laser. A plurality of the elements are made simultaneously by etching the surface of a sheet of material to form a plurality of spaced projections and dividing the sheet along lines between the projections. Prior to dividing the sheet, the surfaces of the projections may be coated with a suitable optical coating.
    Type: Grant
    Filed: November 14, 1975
    Date of Patent: March 8, 1977
    Assignee: RCA Corporation
    Inventor: Arthur Herbert Firester
  • Electrochromic device having a dopant therein to improve its color center absorption characteristics
    Patent number: 4009935
    Abstract: An electrochromic device includes a layer of electrochromic material, such as tungsten oxide. The electrochromic material includes a dopant, such as molybdenum oxide. A sufficient amount of the dopant, for example, 2% by atomic weight, functions to shift the natural color center absorption peak of the electrochromic layer. Due to the shift of the color center absorption peak, coloration of the layer of electrochromic material exhibits an improved match to the spectral sensitivity of the human eye. Consequently, less electrical energy is required to operate the device at satisfactory viewing levels as compared to conventional devices where the color center absorption peak is less closely matched to the spectral sensitivity of the human eye.
    Type: Grant
    Filed: July 11, 1975
    Date of Patent: March 1, 1977
    Assignee: RCA Corporation
    Inventors: Brian Wilfred Faughnan, Richard Seely Crandall
  • Laser alignment system
    Patent number: 4010363
    Abstract: A gas laser has a tube for producing a laser beam and a plurality of heaters around the tube. A detector responds to a misalignment of the laser sending a response to control circuits for the heaters. In response to detector's output, the heater control circuits regulate the heaters so as to heat selective portions of the tube. The tube bends due to the heat resulting in a realignment of the laser.
    Type: Grant
    Filed: October 31, 1975
    Date of Patent: March 1, 1977
    Assignee: RCA Corporation
    Inventor: Karl Gerhard Hernqvist
  • High resistance cermet film and method of making the same
    Patent number: 4010312
    Abstract: A cermet film includes metal particles in an insulator with the metal particles having an average diameter of from about 30A to about 120A. The cermet film has a high resistivity, and low temperature coefficient of resistivity, and is stable under electric fields of up to 10.sup.5 volts/cm. The cermet film can be formed by co-sputtering the metal and the insulator onto a substrate. The sputtered cermet film is then annealed in a reducing atmosphere whereby its resistivity is increased without a corresponding change in its temperature coefficient of resistivity.
    Type: Grant
    Filed: January 23, 1975
    Date of Patent: March 1, 1977
    Assignee: RCA Corporation
    Inventors: Harry Louis Pinch, Benjamin Abeles, Jonathan Isaac Gittleman
  • Polarization-selective laser mirror
    Patent number: 4009933
    Abstract: An optical substrate has an electrically conductive grating on one surface. Over the grating is a multilayered dielectric coating.
    Type: Grant
    Filed: May 7, 1975
    Date of Patent: March 1, 1977
    Assignee: RCA Corporation
    Inventor: Arthur Herbert Firester
  • Method of fabricating large area, high voltage PIN photodiode devices
    Patent number: 4009058
    Abstract: The body of a PIN photodiode is of a silicon semiconductor material. The PIN photodiode has a large area incident surface on which light impinges and is operated at high voltages. In the fabrication of a PIN photodiode, as described, a high concentration of N-type dopant is deposited on the body. It has been discovered that if a phosphorus silicate glass, as a source of N-type dopant, is in contact with a surface of the PIN photodiode body in a high temperature ambient and for an extended period of time, lattice damage on the surface of the silicon body results. These lattice defects are responsible for premature voltage breakdown in the device. In a first method of fabrication of PIN photodiode devices the phosphorus silicate glass is on the silicon surface for about 12 minutes after which it is removed and then any phosphorus atoms in the surface of the body are diffused into the body.
    Type: Grant
    Filed: January 26, 1976
    Date of Patent: February 22, 1977
    Assignee: RCA Corporation
    Inventor: Mark Philip Mills
  • Ultra-violet gas laser
    Patent number: 4008445
    Abstract: A gas laser tube has two regions, one characterized by a high electron temperature and the other by a low electron temperature. Included in the tube is means for establishing a space charge double sheath to separate the two regions. A mirror is located at each end of the region of low electron temperature.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: February 15, 1977
    Assignee: RCA Corporation
    Inventor: Karl Gerhard Hernqvist
  • Olefin-SO.sub.2 copolymer film adhesion to a substrate
    Patent number: 4007295
    Abstract: To improve the adherence of an olefin-SO.sub.2 copolymer film employed as an electron beam resist to a metallic substrate, a thin film of gold is first applied to the substrate. The resulting bond is strong enough to withstand exposure to electron beams, development of the resist film and electroplating of the film witout undercutting, lifting or distortion of the film.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: February 8, 1977
    Assignee: RCA Corporation
    Inventors: Eugene Samuel Poliniak, Richard Joseph Himics, Henry Wielicki
  • Phototube having improved electron collection efficiency
    Patent number: 4006376
    Abstract: Photoelectrons emitted from a flat photocathode are collected within an evacuated envelope by a surface of an electrode. The photoelectrons are accelerated by an electron lens system, as an electron stream, within an evacuated cavity between the photocathode and the electrode surface. The photoelectrons are accelerated through two succeeding cavity regions in which the electron trajectories associated with the electron stream are increasingly compressed. A cavity region of lessening compression of the electron trajectories associated with the electron stream is defined between the two cavity regions of increasing compression. The electrode surface is located closely proximate to the cavity region of greatest compression to collect a maximum number of the photoelectrons.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: February 1, 1977
    Assignee: RCA Corporation
    Inventors: Richard Dale Faulkner, Robert Edwin McHose
  • Method of recording information in which the electron beam sensitive material contains 4,4'-bis(3-diazo-3-4-oxo-1-naphthalene sulfonyloxy)benzil
    Patent number: 4005437
    Abstract: Recording media comprising a mixture of 4,4'-bis(3-diazo-3,4-dihydro-4-oxo-1-naphthalenesulfonyloxy)benzil and an alkali soluble resin are suitable for recording information with electron beams. These recording media have high sensitivity, high resolving power and can be reproducibly formulated.
    Type: Grant
    Filed: April 18, 1975
    Date of Patent: January 25, 1977
    Assignee: RCA Corporation
    Inventors: Daniel Louis Ross, Lucian Anthony Barton
  • Liquid crystal devices
    Patent number: 4003844
    Abstract: The addition of certain nitrobenzene compounds to liquid crystal compositions having positive dielectric anisotropy, lowers the threshold voltage of electro-optic cells including such compositions. The nitrobenzene compounds have the formula ##STR1## wherein R is an alkyl group of 1-20 carbon atoms, X.sub.1 and X.sub.3 can be hydrogen or nitro and X.sub.2 can be hydrogen, --NO.sub.2, ##STR2## or--O--CH.sub.2 CN, with the proviso that at least one of X.sub.1, X.sub.2 or X.sub.3 is a radical other than hydrogen.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: January 18, 1977
    Assignee: RCA Corporation
    Inventor: Howard Sorkin
  • Metal coating for video discs
    Patent number: 4004080
    Abstract: An improved metal coating for a video disc of a grooved polymer disc, a conductive metal coating thereon and a dielectric coating on said metal coating, wherein said metal coating comprises a film of a pseudoalloy composition of an alloy of nickel and chromium and, optionally, iron, containing from about 10 to about 25 atomic percent of oxygen admixed with from about 10 to 15 atomic percent of copper.
    Type: Grant
    Filed: July 25, 1975
    Date of Patent: January 18, 1977
    Assignee: RCA Corporation
    Inventors: John L. Vossen, Jr., Frederick Russell Nyman, Dennis Glendon Fisher, George Frederick Nichols
  • Shadow mask cathode ray tube shield
    Patent number: 4002941
    Abstract: A rectangular multi-apertured shadow mask electrode having a rectangular peripheral reinforcing frame of L shaped cross section is mounted within the rectangular envelope of a color cathode ray tube adjacent to the faceplate with a spacing gap between the frame and the side wall of the envelope. An electron shield of thin metal (e.g. Al) foil extends around and across the spacing gap to prevent scattering of beam electrons during overscan of the mask. The shield comprises an inner flange attached to one flange of the frame by means of tabs and an outer flange pressed against the side wall of the envelope. At each corner, the shield includes a portion of U-shaped cross-section disposed within the spacing gap with the sides of the U resiliently engaging the envelope side wall and the other flange of the frame.
    Type: Grant
    Filed: July 1, 1968
    Date of Patent: January 11, 1977
    Assignee: RCA Corporation
    Inventor: Robert C. Demmy