Patents Represented by Attorney William Stepanishen
  • Patent number: 4999552
    Abstract: A torque motor driver apparatus utilizing an operational amplifier driver which operates near zero milliamps output current, to drive and control a torque motor of non-zero null current, with minimum steady-state power consumption and full functional performance. An enable/disable fail safe switch is included and is positioned in series with the power source and torque motor to disable the torque motor as necessary. A pair of sensing units sense the torque motor voltage and DC resistance to provide a fault indication when either a low resistance or shorted condition or high resistance or open condition exists.
    Type: Grant
    Filed: February 27, 1990
    Date of Patent: March 12, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Christopher Seipelt
  • Patent number: 4998112
    Abstract: A method for measuring the far field antenna pattern of a large phased array antenna on a conventional far field range by applying a correction factor to the antenna phase shifters. As the antenna is electronically steered to each of its scan angle, a particular correction factor is applied to each radiating elements to correct the far field antenna pattern to the shortened far field range.
    Type: Grant
    Filed: August 29, 1989
    Date of Patent: March 5, 1991
    Assignee: The United States of America represented by the Secretary of the Airforce
    Inventors: Peter R. Franchi, Harvey Tobin
  • Patent number: 4962424
    Abstract: A video airdrop sight apparatus having a video camera which is mounted on a gyro-stabilizes gimbal structure for correction about the pitch and roll axis. The video camera which is positioned in the bottom of a cargo plane provides video signals to a monitor in the flight deck. Calibrated markings on the monitor screen indicate cargo airdrop release points to the flight crew.
    Type: Grant
    Filed: March 10, 1989
    Date of Patent: October 9, 1990
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Richard O. Durrenberg
  • Patent number: 4943771
    Abstract: A differential eddy current sensor apparatus having a balance bridge to measure impedance unbalance between a pair of sensor coil which have a conductive target centered therebetween. When the target is moved toward one of the sensors the resultant impedance unbalance is detected at the bridge and demodulated by a demodulator unit to provide an analog output signal which is proportional to the target misalignment.
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: July 24, 1990
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Anthony N. Fuschetto
  • Patent number: 4926633
    Abstract: A coolant pressure regulating appartus having a predetermined number of coolant pressure regulating valves which rotate against a spring bias to divert coolant flow and excess pressure from the coolant air fan duct into the engine core exhaust flow. The pressure regulator valve regulates the pressure within a closed cavity suppressor to the pressure level within the core without any affect upon the upstream fan duct pressure.
    Type: Grant
    Filed: June 27, 1989
    Date of Patent: May 22, 1990
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Dudley O. Nash, Frederick C. Herzner
  • Patent number: 4924230
    Abstract: A radar search detection apparatus having a monopulse antenna to receive sum and difference beam signals which are applied to separate target detection channels to detect and identify target returns.
    Type: Grant
    Filed: March 14, 1989
    Date of Patent: May 8, 1990
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Raymond G. Martin
  • Patent number: 4903492
    Abstract: A dilution air dispensing apparatus for a double dome combustor with dilution air dispensing holes that are staggered on the opposite walls of the centerbody. The wakes on the downstream side of the jets provide avenues of access for the deflected combustion gases to continue their travel across the combustor and into the regions downstream of the opposite domes. The gases then mix with the remaining undeflected gases from the domes and with the spent dilution air before reaching a combustor exit plane.
    Type: Grant
    Filed: September 7, 1988
    Date of Patent: February 27, 1990
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Robert C. King
  • Patent number: 4905242
    Abstract: An error detection and correction apparatus utilizing seven internally generated check bits which are applied to incoming data signals on the next clock. The combination data signals are written into the system random access memory and are reapplied to the error detection and correction apparatus. An address trap register is programmed to trap the address of the single or multiple bit errors. The address trap register also captures the error flags and the syndrome bit so that detected faults can be isolated. A single bit error correction circuit is utilized to correct single bit errors in the data signal.
    Type: Grant
    Filed: June 9, 1987
    Date of Patent: February 27, 1990
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Raymond H. Popp
  • Patent number: 4896032
    Abstract: An active boresight drift measurement and calibration apparatus utilizing a predetermined number of interferometer units to measure the distances between themselves, the target tracking unit and the beam direction sensing unit. The interferometer units provide the initial alignment reference and by periodic repeat measurements provides distance change data to establish boresight alignment drift correction angles.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: January 23, 1990
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: James M. Ball, Issac Richman
  • Patent number: 4888566
    Abstract: A temperature-compensated crystal oscillator utilizing a fundamental frequency crystal with an input RC network to bias an input transistor. Temperature compensation for the oscillator is achieved by the use of a series diode in the emitter circuit of the input transistor. As the temperature changes, the emitter-to-base voltage varies and causes the emitter current to vary in the opposite direction. The voltage across the series diode tracks with the emitter-to-base voltage in the same direction. With these occurrences, the emitter-to-collector voltage is controlled and stabilized over a range of temperature changes. The parallel RC circuit which couples the input transistor to the output drive transistor provides the necessary base current and input impedance for the output trnasistor to permit saturation of and wave shaping by the output drive transistor.
    Type: Grant
    Filed: April 19, 1989
    Date of Patent: December 19, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Ban S. Bong, Francis T. Yu, Robert Bremer
  • Patent number: 4872135
    Abstract: A random wavefront is incident on an aperture plate with a double pinhole of variable separation that is followed by Fourier transforming optics which focuses an intensity profile on a detector array. The detector array is located in the Fourier transform plane of the Fourier transform lens. The time average of the intensity as a function of hole separation yields the root mean square phase and the phase correlation function of the applied wavefront.
    Type: Grant
    Filed: December 7, 1984
    Date of Patent: October 3, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Phillip R. Peterson, Joseph M. Geary
  • Patent number: 4855749
    Abstract: A planar integrated opto-electronic transceiver apparatus having a pair of broadband tapered slot line antennas which are monolithically integrated on an ion implanted silicon on sapphire substrate. An optical pulse which is applied to the narrow slot of the transmitting antenna, generates an electromagnetic transient to the antenna aperture from which it is radiated to receiver slot line antenna. The received electromagnetic transient is detected at the narrow slot and is time resolved by an optical sampling signal.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: August 8, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Alfred P. DeFonzo
  • Patent number: 4851847
    Abstract: A method for eliminating self-screening noise jamming from the main beam of a radar in order to reveal the skin echoes of aircraft at the same angle, including the aircraft carrying the jammer by using a main antenna and an auxiliary antenna located a short distance apart, delaying the signal from the auxiliary antenna, decorrelating the signals and cancelling the jamming signals.
    Type: Grant
    Filed: January 22, 1970
    Date of Patent: July 25, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Charles B. Clarkson
  • Patent number: 4840026
    Abstract: A band clamp apparatus having two 180.degree. segments which are bolted together at flanges on the horizontal centerline. A substantial portion of each segment has a scalloped band contour for weight reduction. An internal groove in the band clamp which has parallel facing walls which engage the mated flanges of the casings of the engine/exhaust system. Local radial restraints are provided on the engine/exhaust system casings to achieve radial constraint and circumferential positioning of the band clamp apparatus.
    Type: Grant
    Filed: February 24, 1988
    Date of Patent: June 20, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Dudley O. Nash, Glenn L. Knight, Jr., James H. Bertke
  • Patent number: 4837683
    Abstract: A hidden fault bit apparatus for a self-organizing digital processor system utilizing a single bit of non-volatile memory to store a hidden fault bit in each digital processor unit of the system. The hidden fault bit indicates that the digital processor which contains it, is believed to contain a hidden fault and therefore, should not participate in the self-organization process.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: June 6, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Malcolm Frazier
  • Patent number: 4833677
    Abstract: The RAM is partitioned into modules, each of which appear as the leaf node of a binary interconnect network. This network carries the address/data/control bus which permits the nodes to communicate between themselves and with the outside world. The address, data and control signals are applied to the root node. The most significant address bit is decoded, generating either a left subtree or a right subtree select. The other signals would be buffered and propogated down the tree. The solution process occurs at each level within the bus until finally a single leaf node would be selected. Within the node, then, the internal timing and control unit would access the data requested, sending it up the tree or writing the value on the data bus, into the addressed location.
    Type: Grant
    Filed: June 12, 1987
    Date of Patent: May 23, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Najmi T. Jarwala, Dhiraj K. Pradhan
  • Patent number: 4828207
    Abstract: This fluid lock permits transiting an object between different fluid pressure through a transiting hole in a wall separating a higher fluid pressure side from a lower fluid pressure side on opposite sides of the wall; has higher and lower fluid pressure doors, each hinged for pivotal movement between an open position for permitting transiting through the hole from one to the other pressure side and a closed position for sealing the opening; and has a transiting container formed between the doors in closed position, and closely form fitting the transiting object, for minimizing the loss of fluid between the sides during transiting the object through the hole.
    Type: Grant
    Filed: June 18, 1987
    Date of Patent: May 9, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: William E. Haynes
  • Patent number: 4821671
    Abstract: A captive volume device containing a small amount of solid propellant and a safe life indicator such as a colorimeter material or a differential pressure sensor. As the propellant deteriorates, it expends a gas which changes the color of the colorimeter material or causes the differential pressure sensor to alter its position, indicating that the propellant material is useless.
    Type: Grant
    Filed: June 27, 1985
    Date of Patent: April 18, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Frank G. Borgardt
  • Patent number: 4812718
    Abstract: High resolution color monitor apparatus having separate focusing supplies for each of the three focusing grids.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: March 14, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Lawrence A. Nix, Jr.
  • Patent number: 4813052
    Abstract: A waveguide gas laser having a ridged dielectric substrate to form a gas filled region in which an electric discharge generates a lasing mode. These ridged waveguide configurations may be utilized in either a rectangular or circular guide structure.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: March 14, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Anthony J. DeMaria, William Bridges