Patents Assigned to RCA Corporation
  • Patent number: 4751612
    Abstract: A speaker having a slotted flange is attached by a robot to printed circuit board mounting posts. The posts are slotted and dimensioned so the post slots are slid into engagement with the flange slots in interlocking arrangement. The posts and flange are dimensioned so that a robot hand can slide the flange between the posts in interference fit such that the relatively rigid posts are torqued apart flexing the board. When the flange and post slots engage, the board flex forces snap the posts and flange in locked engagement.
    Type: Grant
    Filed: October 8, 1987
    Date of Patent: June 14, 1988
    Assignee: RCA Corporation
    Inventor: Paul R. Smith
  • Patent number: 4751554
    Abstract: An SOS integrated circuit includes a plurality of spaced islands of single-crystalline silicon on a surface of a sapphire substrate. A conformal layer of silicon oxide is on the surface of the sapphire substrate between the islands and extends along a portion of the side surfaces of the islands. A layer of polycrystalline silicon is over the silicon oxide layer and extends over the side surface and at least a portion of the top surface of the islands. A separate field-effect transistor is on each island and includes source and drain regions spaced by a channel region and a channel dielectric layer over the channel region. The polycrystalline silicon layer may extend over the channel dielectric to serve as the gate of the transistor. The method of making the circuit includes depositing the silicon oxide layer over the sapphire substrate surface and the islands, and applying a layer of a negative photoresist over the silicon oxide layer.
    Type: Grant
    Filed: September 27, 1985
    Date of Patent: June 14, 1988
    Assignee: RCA Corporation
    Inventors: George L. Schnable, Kenneth M. Schlesier
  • Patent number: 4751513
    Abstract: The characteristics of antennas are modified by photosensitive electrical elements connected to the radiating elements. The photosensitive elements are biased by light, by direct electrical bias, or both. The photosensitive element may be a PIN diode. The bias may be applied by general illumination or conducted by a fiber optic cable.
    Type: Grant
    Filed: May 2, 1986
    Date of Patent: June 14, 1988
    Assignee: RCA Corporation
    Inventors: Afshin S. Daryoush, Peter R. Herczfeld, Arye Rosen
  • Patent number: 4749984
    Abstract: A subranging A/D converter generates high and low voltages using first and second DACs. A voltage divider receives the high and low voltages to generate plural reference voltages. A bank of comparators compares the analog voltage which is to be converted to each of the reference voltages, and a clocked logic circuit generates an intermediate digital signal indicative of the analog value relative to the plural reference voltages. The intermediate signal is used to decrement the high voltage and increment the low voltage, so that the reference voltages produced by the voltage divider assume subrange values. The process is repeated for as many clock cycles as is required to converge the high and low voltages to equal the analog voltage.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: June 7, 1988
    Assignee: RCA Corporation
    Inventors: Kalman J. Prost, John L. Bradshaw
  • Patent number: 4746693
    Abstract: A composition suitable for forming polyalkylsilsesquioxane coatings is prepared by emulsion hydrolysis of one or more silanes in the presence of a nonvolatile, nonionic catalyst, a nonionic fluorochemical surfactant and sufficient water to only partially hydrolyze the silanes. The resulting stable composition will form the final resin upon exposure to atmospheric moisture. A novel resin, polymethyl/isobutylsilsesquioxane, is particularly suitable for such coatings.
    Type: Grant
    Filed: December 12, 1986
    Date of Patent: May 24, 1988
    Assignee: RCA Corporation
    Inventor: Martin G. Meder
  • Patent number: 4746317
    Abstract: An electron tube evacuating system includes a manifold section having an evacuation chamber. A tube mounting section has a plurality of evacuation apertures in communication with the evacuation chamber. A plurality of tube mounting members individually hermetically mount tubes to be evacuated onto the mounting section. Each mounting member has an aperture in communication with the evacuation chamber.
    Type: Grant
    Filed: November 30, 1987
    Date of Patent: May 24, 1988
    Assignee: RCA Corporation
    Inventors: Donald B. Kaiser, Robert W. Groff
  • Patent number: 4746588
    Abstract: A photosensitive film on a glass surface is prepared by: dispensing a quantity of aqueous emulsion containing the film constituents on the surface, distributing the emulsion as a layer over the surface, leveling the distributed layer and then drying the layer. To burst any bubbles that form during distribution, and to remove residual effects of the bubbles, a mist of a surface-tension-reducing liquid, such as methyl alcohol, is contacted with the distributed layer during leveling.
    Type: Grant
    Filed: November 25, 1985
    Date of Patent: May 24, 1988
    Assignee: RCA Corporation
    Inventors: Lawrence H. Ditty, Victor C. Sledzinski
  • 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
  • Patent number: 4745477
    Abstract: A synchronizing pulse separator for a video apparatus provides horizontal and vertical synchronizing pulses from a composite video signal. The sync separator incorporates a compensation circuit that achieves noise immune operation with composite video signals that provide progressive field display and consequently lack synchronization equalizing pulses. The compensation circuit maintains a sufficient bias level on the sync separator transistor during the vertical blanking interval to prevent premature triggering of the vertical deflection circuit due to noise.
    Type: Grant
    Filed: July 7, 1986
    Date of Patent: May 17, 1988
    Assignee: RCA Corporation
    Inventors: Isaac M. Bell, Thomas D. Gurley
  • Patent number: 4745451
    Abstract: A photodetector array having reflector means positioned over the low response regions between elements of the array. Light incident on the reflector means is reflected into a high response region of the array. The invention also includes a method of forming the reflector means comprising the steps of forming wedge-shaped projections on the surface of a mold, coating the projections with a reflective material, filling the space between the coated projections with a transparent material and separating the mold from the material with the reflective layer adhered to the material.
    Type: Grant
    Filed: July 1, 1983
    Date of Patent: May 17, 1988
    Assignee: RCA Corporation
    Inventors: Paul P. Webb, Robert J. McIntyre
  • Patent number: 4745462
    Abstract: Computer main memory is used for storing relatively densely sampled green and detail information concerning a television display and for storing relatively sparsely sampled red information and blue information concerning the same television display. The relatively densely sampled green and detail information is read out in substantially real-time from computer main memory during line trace intervals in the television display. The relatively sparsely sampled red information and blue information are read out of computer main memory in advanced and compressed time during selected line retrace intervals in the television display.
    Type: Grant
    Filed: March 2, 1987
    Date of Patent: May 17, 1988
    Assignee: RCA Corporation
    Inventors: Robert A. Dischert, David L. Sprague, Lawrence D. Ryan, Nicola J. Fedele
  • Patent number: 4743866
    Abstract: A local oscillator is arranged in a Colpitts type configuration in which an amplifying device such as a bipolar transistor or field effect transistor having a control electrode (base or gate electrode) is coupled to a first electrode (emitter or source electrode) defining the end of a conduction channel through an oscillation conditioning network conditioning the device to oscillate in a given range and also to a frequency determining network including a first varactor diode responsive to the tuning voltage and an inductance element coupled in series between the control electrode and signal ground, and in which the output is taken at a second electrode (collector or drain) defining the other end of the conduction channel. A range extending circuit including a second varactor diode responsive to the tuning voltage is coupled between the control electrode and signal ground for ensuring that the oscillator operates reliably at both ends of the tuning range.
    Type: Grant
    Filed: November 26, 1986
    Date of Patent: May 10, 1988
    Assignee: RCA Corporation
    Inventor: Max W. Muterspaugh
  • Patent number: 4742270
    Abstract: A degaussing circuit for a video display apparatus eliminates residual degaussing current flow during operation of the video display apparatus. A capacitor is connected between coil of the degaussing relay and the source of energizing voltage. Application of the energizing voltage to the relay coil energizes the relay and initiates degaussing of the cathode ray tube of the video display apparatus, and also causes the capacitor to begin charging. As the capacitor becomes charged, the degaussing relay becomes deenergized, thereby terminating degaussing current flow. The capacitor charging time constant is selected to allow sufficient time for degaussing to occur before deenergization of the degaussing relay.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: May 3, 1988
    Assignee: RCA Corporation
    Inventors: Ronald E. Fernsler, George C. Waybright
  • Patent number: 4742384
    Abstract: A technique for passivating a PN junction adjacent a surface of a semiconductor substrate comprises coating the area of the surface adjacent the PN junction with a layer of hydrogenated amorphous silicon containing between about 5 and about 50 atomic percent of hydrogen.
    Type: Grant
    Filed: March 18, 1983
    Date of Patent: May 3, 1988
    Assignee: RCA Corporation
    Inventors: Jacques I. Pankove, Ming L. Tarng
  • Patent number: 4741567
    Abstract: An end effector suitable for manipulating articles such as mail flats is disclosed. This end effector has parallel reciprocating arms having suction cups for gripping the article to be manipulated and mechanical grippers mounted on the arms outboard of the suction cups. These mechanical grippers may be actuated to provide a mechanical grip on a manipulated article in addition to the suction grip.
    Type: Grant
    Filed: January 12, 1987
    Date of Patent: May 3, 1988
    Assignee: RCA Corporation
    Inventors: John J. Zimmer, Paul B. Pierson
  • Patent number: 4742346
    Abstract: A system for applying grey scale codes to a display device having a plurality of columns of pixels, has a segmented shift register, with one shift register segment for each pixel column. Data stored in the shift register segments are transferred to counters through multiplex circuitry. The counters control transfer gates by which voltages are applied to the pixel columns.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: May 3, 1988
    Assignee: RCA Corporation
    Inventors: Glynn G. Gillette, Roger G. Stewart, John T. Fischer
  • Patent number: 4742266
    Abstract: The present invention provides an improvement in color picture tubes. Such tubes include an electron gun for generating and directing three inline electron beams, a center beam and two side beams, along initially coplanar paths toward a screen of the tube. The gun includes a plurality of spaced electrodes which form a main focus lens for focusing the electron beams. The improvement comprises the plurality of spaced electrodes which form a main focus lens including three electrodes that form an einzel lens in the path of each electron beam. A first einzel lens electrode includes a first portion having three inline apertures that are set back from a second portion forming a single large aperture through which all three electron beams pass. A second einzel lens electrode includes a first portion having three inline apertures that are set back from a second portion forming a single large aperture through which all three electron beams pass.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: May 3, 1988
    Assignee: RCA Corporation
    Inventor: David A. New
  • Patent number: 4741926
    Abstract: Nonuniform topographical features on a substrate are effectively coated for lithographic processing by spin-coating with a suitable resin material in a dual spin cycle. The coating material is initially spin-coated onto the substrate at not less than 4000 rpm, preferably from 6000 to 8000 rpm, until build-up of the coating is detectable on a side wall of a topographical feature facing the centrifugal center of the spinning substrate. The spin speed is immediately reduced to less than 4000 rpm, preferably from about 1000 to 3500 rpm, and spinning is continued for a time sufficient to dry the coating. The subject process is particularly suitable for coating a substrate having nonuniform topographical features with a planarizing material.
    Type: Grant
    Filed: October 29, 1985
    Date of Patent: May 3, 1988
    Assignee: RCA Corporation
    Inventors: Lawrence K. White, Nancy A. Miszkowski
  • Patent number: 4740877
    Abstract: A power supply for a video display apparatus includes circuitry that produces a pulse width modulated signal in response to the selected horizontal deflection rate. The pulse width modulated signal controls the switching of an FET through a transformer to provide a load circuit operating voltage representative of the deflection frequency. A turn-off signal for the FET is provided to a turn-off transistor from the primary winding of the transformer to insure rapid turn off of the FET.
    Type: Grant
    Filed: June 27, 1986
    Date of Patent: April 26, 1988
    Assignee: RCA Corporation
    Inventor: James H. Wharton
  • Patent number: 4739920
    Abstract: A long chain organic acid, such as stearic acid, is used as a flux to bond aluminum to electro-deposited sheet of aluminum, magnesium, or alloys thereof.
    Type: Grant
    Filed: September 3, 1987
    Date of Patent: April 26, 1988
    Assignee: RCA Corporation
    Inventor: Erich F. Kujas