Patents Represented by Attorney Thomas W. Kennedy
  • Patent number: 4669099
    Abstract: A square wave with a 50% duty cycle which has frequency twice that of an input square wave also having a 50% duty cycle is obtained by generating from the incoming square wave two waveforms having 75% duty cycles with the two waveforms 180.degree. out of phase with each other. The two waveforms are combined in an ANDing operation to obtain an output waveform which is a square wave with twice the frequency of the incoming square wave. In similar fashion, using additional similar circuits and gating, tripling is possible.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: May 26, 1987
    Assignee: The Singer Company
    Inventor: Alfred W. Zinn
  • Patent number: 4654668
    Abstract: In order to achieve temperature compensation in a microstrip linear array, the array is periodically loaded by means of a plurality of open circuited stubs coupled to the main transmission line through tightly controlled gap dimensions to provide increasing shunt susceptance which compensates for the decease in shunt susceptance of the line as temperature increases.
    Type: Grant
    Filed: April 3, 1985
    Date of Patent: March 31, 1987
    Assignee: The Singer Company
    Inventors: Leonard Schwartz, Emile J. Deveau
  • Patent number: 4621529
    Abstract: A navigation sensor, including a gyroscopic element, which has a spin axis, and which has flexure hinge for resiliently mounting the element on a base, and a torque sensing assembly, which has a first piezoelectric beam that is mounted in coaxial relation to the spin axis, and which has a first beam restraining member that mounts a first edge portion of the first piezoelectric beam, and which has a second beam restraining member that mounts an opposite edge portion of the first piezoelectric beam. The first piezoelectric beam is adapted to generate an electrical signal proportional to the angular velocity of the navigation sensor about an axis perpendicular to the spin axis.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: November 11, 1986
    Assignee: The Singer Company
    Inventor: Roland Pittman
  • Patent number: 4614317
    Abstract: A radar sensor mounted in a projectile detects a target and orients the projectile so that a self-forging fragment, carried in the projectile, may be properly fired toward the top of the target. The sensor provides means for generating a broad fan beam containing a plurality of closely spaced interference lobes spaced so as to encompass a predetermined target size. The interference lobes are continuously swept across the line of travel and the receiving circuitry provides means for detecting the desired target within the interference lobes.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: September 30, 1986
    Assignee: The Singer Company
    Inventor: Gus Stavis
  • Patent number: 4610543
    Abstract: An electronic dither compensator for a ring laser gyroscope uses a velocity pickoff to eliminate the need for a differentiator following a displacement pick off in order to get a rate signal. The dither pickoff is converted, in a voltage to frequency converter, to a pulse train which is synchronized with the pulse train of the uncompensated input from the gyro detector. An automatic gain control with an amplitude control loop is provided. The pulses from the voltage-to-frequency converter and uncompensated inputs are synchronized and summed and differenced as selected by means of logic to produce gyro output pulses free from the effects of dither rate.
    Type: Grant
    Filed: April 3, 1985
    Date of Patent: September 9, 1986
    Assignee: The Singer Company
    Inventor: Lincoln S. Ferriss
  • Patent number: 4605931
    Abstract: A feed system for a microstrip or stripline antenna includes a serpentine traveling feed located in the plane of interleaved arrays along which a first signal propagates. A chain of crossover structures serves as a second traveling feed, extends in coplanar parallel spaced relation to the first feed, and carries a second propagated signal therealong. First and second ports of each structure connect the serpentine feed to a first group of arrays for coupling the first signal therebetween while third and fourth ports of each structure couple the second signal to a second set of arrays without significant interaction therebetween.
    Type: Grant
    Filed: September 14, 1984
    Date of Patent: August 12, 1986
    Assignee: The Singer Company
    Inventors: James B. Mead, Leonard Schwartz, Emile J. Deveau
  • Patent number: 4603332
    Abstract: Two separate microstrip antennas are interleaved in the same plane thereby occupying substantially the same area as a single antenna. Each antenna aperture produces two beams and the configuration for each antenna includes a single feed on each planar array which results in lowered overwater bias error. Each planar array antenna can have radiating arrays of different radiator spacing. Using forward firing arrays for one antenna and backward firing arrays for the other antenna, a radiated spacing is chosen for each interleaved antenna which results in temperature compensation in the along track direction.
    Type: Grant
    Filed: September 14, 1984
    Date of Patent: July 29, 1986
    Assignee: The Singer Company
    Inventors: James B. Mead, Emile J. Deveau, Leonard Schwartz
  • Patent number: 4601205
    Abstract: An angular velocity sensing device having a pair of bendable piezoelectric crystal members encounters undesirable effects due to linear acceleration. To buck out the sensing device signal component representing this effect, a compensating device having its own piezoelectric bendable crystal is mounted to the same spin axis shaft as the angular velocity device, in fixed offset relationship thereto, so that it generates a buck out signal in phase with the undesired signal component from the angular velocity sensing device.
    Type: Grant
    Filed: November 19, 1984
    Date of Patent: July 22, 1986
    Assignee: The Singer Company
    Inventor: Roland Pittman
  • Patent number: 4599803
    Abstract: A heading indicator is disclosed which utilizes a one degree of freedom platform stabilized by a two degree of freedom dry flexure gyro. The output of one of the sensitive axis is coupled through an amplifier to the corresponding torquer in the gyro and selectively through an another amplifier to the opposite torquer. The other sensitive axis output is coupled through an amplifier to the platform. The indicator initializes at true north and is then switched to a directional gyro mode.
    Type: Grant
    Filed: August 15, 1979
    Date of Patent: July 15, 1986
    Assignee: The Singer Company
    Inventors: George Galuschak, Richard J. Stomber
  • Patent number: 4593576
    Abstract: An internally and externally threaded double nut is screwed onto the threaded shaft of a stepper motor. The nut is restrained from rotational motion thereby limiting it to translation along the shaft axis. An internally threaded output sleeve is screwed onto the external thread of the double threaded nut. The pitch of the nut internal thread is smaller than that of the external thread so that rotary motion reduction occurs at the output sleeve. A ball bearing is positioned in contacting support between the sleeve and the shaft thereby minimizing output sleeve tolerance accumulations of eccentricity and axial positioning.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: June 10, 1986
    Assignee: The Singer Company
    Inventor: Arnold Schindel
  • Patent number: 4585346
    Abstract: A pathlength controller is provided for a three-axis, cube-shaped ring laser gyroscope assembly having three four-sided gyroscopes with six mirrors, including three movable mirrors and three fixed mirrors, wherein the controller connects between the three movable mirrors and the three fixed mirrors, and is adapted to change the pathlength of one gyroscope without changing the pathlengths of the other two gyroscopes.
    Type: Grant
    Filed: March 17, 1983
    Date of Patent: April 29, 1986
    Assignee: The Singer Company
    Inventor: Bo H. G. Ljung
  • Patent number: 4561780
    Abstract: A pathlength controller for a ring laser gyroscope with a modulated mirror is disclosed where a voltage bias is applied to the modulation signal to prevent starting the ring laser gyroscope at a point where it operates with two equal longitudinal modes.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: December 31, 1985
    Assignee: The Singer Company
    Inventors: Bo H. G. Ljung, Hyman Cohen
  • Patent number: 4545682
    Abstract: A light source signal is amplitude modulated by a phase modulated sinusoid and passes through two directional couplers so that two beams are formed. The beams are transmitted to the ends of an optic-fiber coil for propagation therethrough in opposite circular directions. An optical phase modulator is present at one end of the coil so that a phase modulation of fixed frequency and amplitude is introduced to a first beam as it enters the coil and to the counterpropagating beam as it leaves the coil. The counterpropagating beams produce a signal at a photodetector which is a function of rotation rate. An electronic control unit is connected to the photodetector to generate a digital signal output as a frequency which is a measure of rotation rate. A feedback loop is completed by connecting a signal, produced by the control unit, to the amplitude modulated light source for nulling the phase shift due to rotation rate.
    Type: Grant
    Filed: August 11, 1983
    Date of Patent: October 8, 1985
    Assignee: The Singer Company
    Inventor: Ivan Greenwood
  • Patent number: 4536087
    Abstract: Dither compensation in a ring laser gyroscope is effectuated by one or more retroreflective prisms or by one or more pairs of cofunctioning transparent wedges mounted to the gyroscope casing in a dither compensation plane parallel to the plane of the laser light path in the gyroscope cavity. Prisms or beam splitters reflect at least one of two counter-rotating laser beams to the dither compensation plane from the plane of the cavity. An optical sensor comprising a photodiode for detecting and analyzing the interfering laser beams can be placed in the dither compensation plane or in the plane of the gyroscope cavity.
    Type: Grant
    Filed: June 8, 1983
    Date of Patent: August 20, 1985
    Assignee: The Singer Company
    Inventor: Donald Shernoff
  • Patent number: 4532516
    Abstract: In distance measuring equipment apparatus which includes an antenna; a transmitter/receiver coupled to the antenna to transmit interrogation pulses and receive responses from a ground station, the pulses being spaced apart, the ground station also transmitting other responses between the responses; and a data processor receiving video and gate signals from the transmitter/receiver and calculating therefrom the distance to the ground station in order to calibrate for receiver and installation delays. The receiving signal, other than when one of the responses is being received, is modulated. The phase of the resulting modulation on the video signal with respect to the phase of modulation at the modulator is detected to determine the receiver and installation delay.
    Type: Grant
    Filed: October 18, 1982
    Date of Patent: July 30, 1985
    Assignee: The Singer Company
    Inventors: Victor A. Frampton, James R. Drake, William R. Slump
  • Patent number: 4516076
    Abstract: An arrangement for detecting faults in automatic test systems of the type wherein test points in a unit under test are connected to test instruments by the programmed closure of electromechanical relay contacts. Respective contacts of the relays are connected to each other and, during periods intermediate of the closure of the relays, a detector circuit is coupled to the interconnected relay contacts. The detector circuit compares a voltage or resistance present on the interconnected relay contacts to a threshold. In one embodiment, if a difference between a signal on the interconnected relay contacts and the threshold persists for a predetermined period, an interrupt signal is generated which prevents further closures of the relays. In this manner, catastrophic failures of the unit under test and the test instruments are prevented.
    Type: Grant
    Filed: September 17, 1982
    Date of Patent: May 7, 1985
    Assignee: The Singer Company
    Inventors: Joseph C. Pillari, Arthur W. Willging
  • Patent number: 4512086
    Abstract: A heading indicator is disclosed which utilizes a one-degree-of-freedom platform stabilized by a two-degree-of-freedom dry flexure gyro. The output of one of the sensitive axis is coupled through an amplifier to the corresponding torquer in the gyro and selectively through another amplifier to the opposite torquer. The other sensitive axis output is coupled through an amplifier to the platform. The indicator initializes to true north and is then switched to a directional gyro mode.
    Type: Grant
    Filed: February 9, 1982
    Date of Patent: April 23, 1985
    Assignee: The Singer Company
    Inventors: George Galuschak, Richard J. Stomber
  • Patent number: 4464752
    Abstract: A computer system is provided for reconstructing a word, which is altered during cycling of the computer memory when a nuclear event occurs. The computer system includes a nuclear event detector, a circuit for setting flags in response to the detection of an event, a generating circuit for generating a random variable time interval in response to the flags, a circuit for performing block parity on the data in the memory in response to the flags, and correcting circuit for correcting the altered word in the memory in response to the block parity circuit. The computer system further includes a circuit for correcting multiple memory word upsets in response to the block parity circuit and an updating circuit for performing block parity during sequential storage or random storage of the data words before or after an event.
    Type: Grant
    Filed: November 6, 1981
    Date of Patent: August 7, 1984
    Assignee: The Singer Company
    Inventors: George F. Schroeder, Garry E. Pitt, John F. Scully, Lell E. Barnes
  • Patent number: 4464721
    Abstract: A digitized pickoff system is provided for sensing displacement of complementary elements of a dual element pickoff assembly in an inertial sensor for use in an inertial navigation system comprising a relaxation oscillator adapted to sequentially select each of the pickoff elements with the reactance of the selected element determining the oscillating frequency thereof, a data converter adapted to measure the oscillating period thereof, and logic means having an output of a digital number which is proportional to the difference of oscillator periods of the two elements of the dual element pickoff assembly and which is a digital representation of the pickoff displacement.
    Type: Grant
    Filed: February 8, 1982
    Date of Patent: August 7, 1984
    Assignee: The Singer Company
    Inventor: Joseph V. McKenna
  • Patent number: 4464747
    Abstract: The disclosure describes a memory system having a large bit capacity, capable of detecting, locating, and correcting errors. The memory is subdivided into several identical storage matrices wherein parity calculations are performed in the vertical direction within a matrix and in the horizontal direction across a series of matrices. The system also has provision for self-repairs.
    Type: Grant
    Filed: February 18, 1982
    Date of Patent: August 7, 1984
    Assignee: The Singer Company
    Inventors: Alan I. Groudan, Garry E. Pitt, Lell E. Barnes