Patents Represented by Attorney E. M. Whitacre
  • Patent number: 4812708
    Abstract: A thin cathode-ray tube includes a back section having a surface boundary substantially symmetrical in shape to that of a faceplate panel sealed thereto, the back section suppporting a mount which includes an electron gun disposed within the symmetrical boundary.
    Type: Grant
    Filed: January 29, 1985
    Date of Patent: March 14, 1989
    Assignee: RCA Licensing Corp.
    Inventor: Kern K. N. Chang
  • Patent number: 4812130
    Abstract: A printed circuit board has a conductive terminal mounted in an aperture extending therethrough. The terminal has a shoulder portion, adjacent a side surface of the terminal, which contacts one surface of the board adjacent the aperture, and a bottom portion which flares outward to contact a conductive coating disposed, adjacent the aperture, on the opposite surface of the board. The bottom portion is rolled over sufficiently to allow a distal end surface of the bottom portion, adjacent the side surface, to contact the conductive coating at an orientation wherein the distal end surface is substantially parallel to the coating.
    Type: Grant
    Filed: June 27, 1985
    Date of Patent: March 14, 1989
    Assignee: RCA Licensing Corp.
    Inventors: Raymond A. Altenschulte, Glen M. Grabow
  • Patent number: 4805124
    Abstract: The major/minor dimensions of elliptical elements are measured by simultaneously scanning both dimensions of the elements and arranging the data in a matrix for each of the dimensions. A first preselected number of the largest elements are arranged or averaged for one dimension to obtain an average for one of the dimensions. A second predetermined number of largest elements are averaged for the other dimension to obtain an average for the other dimension. The measured dimensions are compared with upper and lower limits to verify the acceptability of the dimensions.
    Type: Grant
    Filed: June 10, 1987
    Date of Patent: February 14, 1989
    Assignee: RCA Licensing Corp.
    Inventor: Frank S. Krufka
  • Patent number: 4804640
    Abstract: A process of forming a three region dielectric film on silicon and a semiconductor device employing such a film are disclosed. Silicon is oxidized in an oxygen-containing ambient. The oxidation step forms a first region of silicon oxide. Once oxidation has begun, reactive sputtering of aluminum in an oxygen plasma is initiated. This forms a second region of said dielectric film which comprises a mixture of silicon and aluminum oxides. A third region comprising substantially aluminum oxide is formed by the continuing reactive sputtering step.A semiconductor device comprising said three region dielectric film interposed between an electrode and a semiconductor body has little or no shift in threshold voltage providing good stability and can be fabricated in substantially less time and/or at lower temperatures than prior art methods.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: February 14, 1989
    Assignee: General Electric Company
    Inventors: Grzegorz Kaganowicz, John W. Robinson, Alfred C. Ipri
  • Patent number: 4804253
    Abstract: A lenticular filter for a display device includes lenticulations which are angularily disposed with respect to both of the axes of the display and which completely cover the viewing area.
    Type: Grant
    Filed: April 6, 1988
    Date of Patent: February 14, 1989
    Assignee: General Electric Company
    Inventor: Wilber C. Stewart
  • Patent number: 4798448
    Abstract: An illumination system for a color display device includes means for separating the different polarizations of incoming light. One of the polarizations is rotated whereby the polarization of all the light directed toward the screen is the same. A lenticular lens array is used to focus light onto the cells of the picture elements. The three primary light colors are split so that the individual cells within the picture elements receive only the desired color of light.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: January 17, 1989
    Assignee: General Electric Company
    Inventor: John A. van Raalte
  • Patent number: 4793845
    Abstract: A method for heat sealing an electron gun mount, having a glass stem, into a neck of a cathode-ray tube includes a mount socket for supporting the mount within the neck and a plurality of burners for applying heat to the outside of the neck proximate the stem. The neck softens, thins and then seals to the stem, causing excess neck material that is lower than the stem, known as cullet, to be cut off. Prior to applying heat, a sleeve is disposed around the mount socket within the neck adjacent to the cullet, with a clearance between the sleeve and both the socket and the neck. A vibrating coil is attached to the sleeve for vibrating the sleeve while applying heat to the outside of the neck.
    Type: Grant
    Filed: October 28, 1987
    Date of Patent: December 27, 1988
    Assignee: RCA Licensing Corporation
    Inventors: Emil V. Fitzke, Michael A. Colacello, Jack F. Otto
  • Patent number: 4773354
    Abstract: An apparatus for dispensing high viscosity paste materials onto a seal edge includes a conditioning chamber which permits the build up of a back pressure to aid the exit of the paste from the outlet orifice of the chamber. An auger which dispenses the paste from a hopper to the seal edge has a unique thread pitch to also aid in the dispensing of high viscosity paste to the seal edge.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: September 27, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Leonard P. Wilbur
  • Patent number: 4769916
    Abstract: A device for measuring the periphery of the kinescope panels of various sizes includes an elongated measuring member for each panel size. A gauge is associated with each elongated measuring member and is set to zero to get an optimum peripheral measurement. The elongated measuring member is tensioned about the panel and the gauge reading is the difference between the actual panel periphery and the optimum panel periphery.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: September 13, 1988
    Assignee: RCA Licensing Corporation
    Inventors: Leonard P. Wilbur, William S. Ambler
  • Patent number: 4766430
    Abstract: A drive circuit for a liquid crystal display includes a counter for each column of the display. The counters are set with brightness counts to establish the grey scales for the pixels. The counters turn transfer gates on when a count is present and off when the count is zero. An analog generator biases the columns through the transfer gates so that each column is biased to a level determined by the brightness count of the respective counter.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: August 23, 1988
    Assignee: General Electric Company
    Inventors: Glynn G. Gillette, Roger G. Stewart, John T. Fischer
  • Patent number: 4765743
    Abstract: A method of inspecting a pattern of elements on a working plate includes producing a negative copy of the working plate and aligning the negative copy with a positive inspection plate having elements slightly larger than the elements of the working plate whereby flaws are revealed as light transmissive spots. The working plate and a negative inspection plate, having the elements slightly smaller than the elements of the working plate, are aligned and flaws are revealed as light transmissive spots.
    Type: Grant
    Filed: March 10, 1987
    Date of Patent: August 23, 1988
    Assignee: RCA Licensing Corporation
    Inventors: Frank S. Krufka, Charles M. Wetzel
  • Patent number: 4760309
    Abstract: A modulator structure includes modulation electrodes electrically coupled into pairs. Isolation electrodes are arranged adjacent to and in the plane of the modulation electrodes. The modulation electrodes are substantially U-shaped, and the isolation electrodes partially extend into the U.
    Type: Grant
    Filed: March 29, 1983
    Date of Patent: July 26, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Wilber C. Stewart
  • Patent number: 4758878
    Abstract: A circuit for converting a monochrome video signal into individual video color signals includes a gate means for individually energizing the color guns of a color picture tube. Control logic sequentially enables the gates so that only one electron gun is energized at a given instant. The circuit works in cooperation with a commercially available pattern generator so that a plurality of rows of patterns of a particular color are scanned across the face of the screen. Because of the sequential scanning, various rows of the selected pattern are composed of the three primary colors.
    Type: Grant
    Filed: August 25, 1987
    Date of Patent: July 19, 1988
    Assignee: RCA Licensing Corporation
    Inventors: Keith R. Frantz, James W. Hauer, Mark E. Carpenter
  • Patent number: 4758728
    Abstract: The misregistration of kinescope panel assemblies is measured by passing UV through the shadow mask to the phosphor screen. The lighthouse optics are set for exposure of one of the three phosphor colors, such as green. The intensity of light emanating from the panel is measured for a plurality of locations on the screen, and for a plurality of incremental positions of the panel assembly with respect to the lighthouse light source. The position of maximum intensity of light emanating from the panel is recorded and used to calculate the misregistration between the phosphor screen and the shadow mask.
    Type: Grant
    Filed: December 24, 1985
    Date of Patent: July 19, 1988
    Assignee: RCA Licensing Corporation
    Inventors: James R. Matey, David P. Bortfeld
  • Patent number: 4749385
    Abstract: A method of providing clean air to a workpiece comprises positioning the workpiece adjacent to a first opening in a conduit. The conduit includes a central segment and a peripheral segment having, respectively, the first opening and a second opening disposed at opposite ends of the conduit. The peripheral segment surrounds the central segment such that the first opening is substantially coplanar with the second opening. A laminar flow of air is created through the conduit in a direction away from the second opening and toward the first opening. The air flow is filtered through a HEPA filter supported within the conduit.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: June 7, 1988
    Assignee: RCA Licensing Corporation
    Inventors: Glenn W. Brunner, Samuel Pearlman, Randall E. McCoy, Jordan R. Nelson
  • Patent number: 4749918
    Abstract: A flat panel display device is divided into channels and includes deflection electrodes for scanning electron beams horizontally across the channels. Convergence electrodes are voltage biased to converge the electron beams at points along the transverse line scanned by the electron beams. A compensation voltage generator provides compensation voltages to compensate for horizontal landing errors of the electron beams.
    Type: Grant
    Filed: December 8, 1981
    Date of Patent: June 7, 1988
    Assignee: RCA Licensing Corporation
    Inventor: John T. Fischer
  • Patent number: 4750131
    Abstract: A method of detecting the forming of defective parts with a progressive die includes the step of generating a reference force/displacement curve for each forming station of the die while a number of sample parts are formed. The curves are stored in a data processor. The forming force at each forming station, and the displacement are monitored during the formation of production parts and supplied to the data processor. The production force data are compared to the reference force data for each displacement to indicate faults in various parameters previously set into the data processor.
    Type: Grant
    Filed: September 11, 1985
    Date of Patent: June 7, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Miguel R. Martinez
  • Patent number: 4748330
    Abstract: A method for measuring spaces in a periodic matrix having a period including a plurality of spaces and areas therebetween includes placing the matrix between a light source and an array of pixels for receiving the light shadow image for the matrix. A plurality of image lines from the matrix are scanned across the array and signals are produced representative of the spaces and areas therebetween, which signals are converted into data values and transmitted to means for storing the data values for each of the scan lines as a row and for successive scan lines as columns. Selected data values in predetermined groups of columns, representing corresponding nonadjacent spaces of the periodic matrix, are added to obtain a total for each group. The total for each group is divided by the number of selected data values in that group. The average data value for each group is multiplied by a linear value representing the average length of each pixel to obtain the average space length for each group.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: May 31, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Frank S. Krufka
  • Patent number: 4748371
    Abstract: A cathode-ray tube includes a shadow mask having an array of apertures mounted adjacent a substantially rectangular faceplate panel with curvature along major and minor axes orthogonal to each other and to a central longitudinal axis passing through the center of the faceplate panel. The shadow mask has a border of varying width disposed between the perimeter of the apertured array and a bend line adjoining a peripheral mask skirt which substantially parallels the central axis and is supported by a shadow-mask frame oriented orthogonally to the central axis. The width of the border is narrow at the major axis, being no greater than five percent of the distance from the minor axis to the bend line along the major axis.
    Type: Grant
    Filed: February 10, 1987
    Date of Patent: May 31, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Richard C. Bauder
  • Patent number: 4747140
    Abstract: A circuit for separating FM signals from a composite signal utilizes a comb filter having successive frequency response nulls which span the frequency spectrum of the FM signal to be separated. The comb filter response is phase linear and defines the pass-band of the desired signal. A nonideal or phase nonlinear bandpass filter can be cascaded with the comb filter to attenuate out of band signals. The cascade combination of the comb filter and nonlinear bandpass filters is a cost effective substitute for the conventional, complicated phase linear bandpass filter having a boxcar frequency response traditionally used to separate FM signals.
    Type: Grant
    Filed: December 24, 1986
    Date of Patent: May 24, 1988
    Assignee: RCA Corporation
    Inventor: John J. Gibson