Patents Examined by Malcolm F. Hubler
  • Patent number: 4362974
    Abstract: A transistor horizontal deflection circuit is energized from a source of unregulated direct voltage derived from the power mains but is conductively isolated therefrom. A switching voltage regulator couples the direct voltage source to the horizontal deflection circuit. The regulator includes a controllable switch serially coupled with the primary winding of a transformer and the source. The switch is controlled to maintain a constant voltage or energy level in the horizontal deflection circuit. A secondary winding conductively isolated from the primary is coupled across the deflection winding for forming a path for bidirectional current flow. The horizontal output transistor is coupled in parallel with the deflection winding for producing retrace pulses which are coupled to the primary winding for reducing the current in the controllable switch to zero during the retrace interval.
    Type: Grant
    Filed: September 15, 1980
    Date of Patent: December 7, 1982
    Assignee: RCA Corporation
    Inventor: Wolfgang F. W. Dietz
  • Patent number: 4361840
    Abstract: A moving window detector for a radar including adding circuits for automatic detection of moving targets wherein the components of prior art devices are substantially reduced by utilizing a digital integration circuit and a shift register with a number of storage locations and wherein the input echo signals are supplied to the input of the shift register and to the integration circuit and the output of the shift register and the integration circuit are supplied to a subtracting circuit which supplies an output to an adder of the integration circuit so as to substantially reduce the number of components over those of the prior art.
    Type: Grant
    Filed: April 4, 1980
    Date of Patent: November 30, 1982
    Assignee: Siemens Aktiengesellschaft
    Inventor: Rudolf Hauptmann
  • Patent number: 4360812
    Abstract: In this disclosure is described a FM-CW radar distance measuring system. By onventional means a frequency modulated continuous wave signal is generated and transmitted toward a target. A sample of the transmitted signal is compared with the received target return signal in a mixer. A second sample of the transmitted signal which is delayed by an amount proportional to the time required for a signal to travel to the target and return is compared with the first sample in a second mixer. The outputs of the two aforementioned mixers are amplified and compared in a third mixer, and the Doppler component is selected for use in indicating the distance to the target.
    Type: Grant
    Filed: March 16, 1967
    Date of Patent: November 23, 1982
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Salvador J. Peperone
  • Patent number: 4359734
    Abstract: An improved system for processing an electrical velocity information signal in a velocity detecting system in which a detector is utilized for developing an electrical information signal, such as a Doppler signal, having a characteristic (e.g. frequency) that varies systematically with the object's velocity. A converter develops an oscillatory signal having a frequency which varies in accordance with the velocity information signal characteristic. A tracking filter having a center frequency that varies with the oscillatory signal filters all frequencies other than the center frequency. A signal generator is responsive to the frequency of the signal passed by the tracking filter for generating an output signal having a frequency which is a preset ratio relative to the center frequency, whereby the output signal of the system is relatively noise-free and has a frequency which represents the velocity of the object being detected.
    Type: Grant
    Filed: January 31, 1979
    Date of Patent: November 16, 1982
    Assignee: Dickey-john Corporation
    Inventor: Wesley J. Bachman
  • Patent number: 4358766
    Abstract: Improved radar system performance in a jamming environment is achieved by making a complete frequency analysis of the jamming power entering the radar receiver during each range sweep (once per transmitted pulse) and then setting the frequency of the next transmitted pulse to the value which corresponds to the minimum jamming power measured.
    Type: Grant
    Filed: July 1, 1974
    Date of Patent: November 9, 1982
    Assignee: Sanders Associates, Inc.
    Inventor: Martin E. Mehron
  • Patent number: 4358763
    Abstract: The invention relates to C-W radar responders, having a carrier of some gigahertz whose amplitude is modulated between some dozens and some hundreds of kilohertz. Such a responder comprises means for sampling the signal it receives in such a manner that the sampling theorem is satisfied with respect to the amplitude-modulation frequency. The responder comprises at least an aerial, a radio-frequency amplifier, a delay line, a clock generator, an input, an output and two switches connected to the input and to the output, respectively, of the amplifier. The operating sequence of the switches, controlled by the clock generator, is such that each sample of the received signal passes through the amplifier more than once before it is re-transmitted.
    Type: Grant
    Filed: May 9, 1980
    Date of Patent: November 9, 1982
    Assignee: U.S. Philips Corporation
    Inventor: Raymond Strauch
  • Patent number: 4357586
    Abstract: A self-converging deflection yoke having toroidally-wound vertical deflection coils incorporates a pair of magnetically permeable field formers mounted on either side of the yoke. The field formers shunt a portion of the external field flux to the vicinity of the electron gun assembly where they form a pincushion-shaped field which aids in vertical coma correction. In one embodiment, a yoke comprising planar-wound vertical coils incorporates both coma-correcting rear field formers and a pair of front crossarm assemblies for providing side-pincushion correction. The resultant yoke provides covergence of electron beams free of coma and side-pincushion distortion with reduced sensitivity to transverse motion. In another embodiment, similar results are obtained without the front crossarms by vertical deflection coil having a nonradial winding configuration.
    Type: Grant
    Filed: May 14, 1980
    Date of Patent: November 2, 1982
    Assignee: RCA Corporation
    Inventors: William H. Barkow, Josef Gross
  • Patent number: 4357608
    Abstract: A scanning radar system having the capability of taking a number of succeve looks at the same range and angle resolution cells with several millisecond time intervals between looks. The scanning radar system includes a pulsed transmitter, a receiver, and an array of energy beam radiators having individual beam paths with associated centerlines. A commutator switch and a duplexer sequentially connect a different one of the radiators to the pulsed transmitter at the beginning of each pulse repetition period and to the receiver during the subsequent interval between pulsed transmissions. A motor rotates the array of radiators as a unit to cause the beam path centerlines to rotate and scan the field of view.
    Type: Grant
    Filed: September 3, 1980
    Date of Patent: November 2, 1982
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Bernard L. Lewis
  • Patent number: 4357609
    Abstract: An accurate radio frequency ranging system is provided for measuring the time of transmission of a signal from a first station to a second station and back to the first station without coherent turn-around of the signal. Each of the two stations is provided with its own range measuring means and its own reference clock. The first station range measuring device is started by the first station reference marker and is stopped by the second station reference marker start signal transmitted from the second station to provide a first range measurement. The second station range measuring device is started by the second station reference marker and is stopped by the reference marker start signal transmitted from the first station to provide a second range measurement.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: November 2, 1982
    Assignee: Sperry Corporation
    Inventor: Billie M. Spencer
  • Patent number: 4356489
    Abstract: A vehicle speed sensing device comprises a Doppler radar unit for producing a Doppler signal related to the vehicle speed and producing a speed signal from the Doppler signal, a first section for extracting noise components in the Doppler signal and producing a noise detection signal, and a second section for producing an output signal of the vehicle sensing device. The device output is the speed signal from the Doppler radar unit when the noise detection signal is absent while the device output is null or a speed signal having an amplitude identical with that of the speed signal just before the appearance of the noise detection signal when the noise detection signal is present.
    Type: Grant
    Filed: April 22, 1980
    Date of Patent: October 26, 1982
    Assignees: Hitachi, Ltd., Nissan Motor Co., Ltd.
    Inventors: Yukitsugu Hirota, Akira Endo, Kenji Sekine
  • Patent number: 4356491
    Abstract: A marine direction finding system is disclosed wherein a rotatable and calibrated dial is placed over a direction indicating dial of a radio direction finder. The radio direction finder indicates direction by illuminating a portion of its indicating dial. The direction of the radial signal received is referenced to a front of the boat which is calibrated as 0.degree.. The rotatable dial is preferably at least semitransparent and is calibrated at a first radius from 0.degree. to 360.degree. and at a second radius also from 0.degree. to 360.degree. but offset by 180.degree.. When a signal is received, the rotatable dial first radius marking is set to a 0.degree. marking on the direction finder in accordance with the current magnetic heading for both.
    Type: Grant
    Filed: August 6, 1980
    Date of Patent: October 26, 1982
    Inventor: Lee Sczepanski
  • Patent number: 4356436
    Abstract: A picture display device in which velocity modulation of the electron beam is effected with a deflection correction signal derived from the video signal to be displayed. The brightness distribution influenced by this deflection correction signal in a sudden brightness transient is corrected by adding to the video signal a brightness correction signal which is predominantly proportional to the product of the video signal and a first derivative with respect to time of the deflection correction signal.
    Type: Grant
    Filed: September 10, 1980
    Date of Patent: October 26, 1982
    Assignee: U.S. Philips Corporation
    Inventors: Piet G. J. Barten, Johannes J. Bos
  • Patent number: 4355312
    Abstract: A processor for operating on video and azimuth signals from a radar system having an antenna which scans in azimuth. The processor enhances the signal-to-noise ratio of the video signals while imposing thereon a substantially constant azimuth delay error.The processor includes a first circuit for forming and storing a count indicative of the video signal history in each range zone. The processor also includes a second circuit for generating and removing a flag signal indicative of azimuth leading and trailing edges respectively of a target pulse in the video signal. A gating circuit is included to pass video signals, for a given range zone, to an output terminal during the presence of a flag signal associated with the zone.
    Type: Grant
    Filed: October 2, 1980
    Date of Patent: October 19, 1982
    Assignee: Hughes Aircraft Company
    Inventors: Gerald L. Bosi, Randolph L. Hack, Thomas C. Cantwell, Richard D. Wilmot
  • Patent number: 4354192
    Abstract: A continuous wave frequency modulated ranging system for measuring the dince between the system and a reflecting body. The system generates certain functions of the Doppler signal envelope which have readily identifiable characteristics at specified ranges. This information is used with the amplitude of the received CW-FM signal to determine first by amplitude that the missile is at the approximate desired height, and then to determine by the generated functions the point of burst of the projectile.
    Type: Grant
    Filed: September 6, 1966
    Date of Patent: October 12, 1982
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Hans W. Kohler
  • Patent number: 4353069
    Abstract: An absorptive coating for reduction of the reflective cross section of a metallic surface is provided which includes a layer of "N" doped material adjacent the metal surface, the N doped material having a characteristic of increasing semiconductor conductivity from the outboard surface junction of the material to the boundary of the metallic surface, a second layer of "P" doped material having a characteristic of increasing semiconductor conductivity from its outboard surface boundary to its junction with the N doped material inboard of it. In the preferred embodiment, a third layer of P material is placed outboard of the second layer. The first and second layers further have electrical connections operatively associated with them, so that an applied voltage may be utilized to vary the electrical characteristics of the coating.
    Type: Grant
    Filed: September 10, 1980
    Date of Patent: October 5, 1982
    Inventors: Peter H. Handel, James A. Jungman, Stephen N. Honickman
  • Patent number: 4353068
    Abstract: A beam emitter type speed sensor for railroad rolling stock is calibrated by positioning an endless belt between rails of the track for the railroad rolling stock. The endless belt has a speed which is controllable. The endless belt is so positioned so that the railroad rolling stock can maneuver the speed sensor in proximity thereover having an antenna-to-belt distance comparable to the antenna-to-roadbed distance. A method of calibrating the indicator in the cab includes rotating the belt at a known speed.
    Type: Grant
    Filed: May 23, 1980
    Date of Patent: October 5, 1982
    Inventor: Emilio A. Fernandez
  • Patent number: 4352077
    Abstract: A window assembly for ridged waveguide has a slab of dielectric extending clear across the waveguide cross-section. The slab may be perpendicular to the waveguide or cross it at an angle. The waveguide ridge or ridges are notched so that the dielectric slab passes through the notch. Inductive tuning posts may be added to make a broadband match. The window assembly has an excellent match over more than an octave frequency range.
    Type: Grant
    Filed: June 4, 1981
    Date of Patent: September 28, 1982
    Assignee: Varian Associates, Inc.
    Inventor: Richard Z. Gerlack
  • Patent number: 4352106
    Abstract: In order to provide coverage of a full 360 degrees of azimuth even when heeled a radar reflector consists of ten trihedral reflectors directed outwardly of a major axis the inner eight of which are formed in vertically displaced pairs of dihedral reflectors sub-divided by a divider portion which reflectors are positioned such that the apexes of the two central dihedral reflectors are relatively displaced about the major axis by an angle a and the apexes of the dihedral reflectors on each side of the central reflectors are displaced relative to the nearest apex of a central dihedral reflector each by an angle different to a, the arrangement being such that the spacing between the central axes of reflection of adjacent trihedral reflectors is in the range 25 degrees to 45 degrees. The reflector is suitable for use on small boats and other vessels and marine buoys.
    Type: Grant
    Filed: September 5, 1980
    Date of Patent: September 28, 1982
    Inventor: John H. Firth
  • Patent number: 4352047
    Abstract: A side pincushion correcting circuit is provided in a color television receiver of the type including a cathode ray tube having an index stripe disposed on a screen scanned by a cathode beam and a detector for detecting the scanning of the index stripe by the cathode beam and producing a pulse signal as a result of such detecting.
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: September 28, 1982
    Assignee: Sony Corporation
    Inventors: Tomoyoshi Imayasu, Katsuo Isono
  • Patent number: 4347514
    Abstract: Antenna alignment in troposcatter systems is accomplished by: (1) nutating the antenna receiver beam with a sinusoidal nutation signal to induce envelope modulation on the received signal; (2) crosscorrelating the envelope of the received signal with the nutating signal; and, (3) aligning the average angle of the antenna receiver beam into the position where the crosscorrelation goes to zero.
    Type: Grant
    Filed: August 19, 1980
    Date of Patent: August 31, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: William P. Birkemeier