Patents Represented by Attorney William H. Anderson
  • Patent number: 5608566
    Abstract: A multiple quantum well layer is sandwiched between two core waveguide layers, which are, in turn, sandwiched by two cladding layers. This layering is deposited on a substrate with a metal contact and the top cladding layer is formed so as to form at least two parallel channels with metal contacts. The refractive indices of the various materials comprising the layers are chosen such that the cladding layers and the multiple quantum well layer have refractive indices which are less than the refractive index of the core waveguide layers, but which are different from one another. In operation, an electric field is applied to the structure via metal contacts on the parallel channels. Depending on the magnitude of the electric field the optical signal may be switched from one channel to the other channel and depending on the magnitude and direction of the electric field and the intensity of the optical signal, the optical signal may be switched from the upper waveguide to the lower waveguide.
    Type: Grant
    Filed: August 11, 1995
    Date of Patent: March 4, 1997
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Mitra Dutta, Joel R. Shappirio
  • Patent number: 5606348
    Abstract: A programmable display interface device and method is easily adapted to de a variety of different display devices of different sizes and resolutions including CRT, LCD, EL, FED, and plasma displays. The interface device and method also allows such displays to be connected to and display images from different video and graphics sources such as cameras and computer outputs and allows the display of 3D stereo image data to any of the above mentioned displays in the format that is compatible with any of the time-multiplex, spatial-multiplex, and multiplexed multi-images methods used in producing 3D stereo effects. The interface device and method applies equally to color and monochrome displays.
    Type: Grant
    Filed: January 13, 1995
    Date of Patent: February 25, 1997
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Yue T. Chiu
  • Patent number: 5605490
    Abstract: A piezoelectric material langasite, having a defect free surface is obtai by polishing the surface of the material with a colloidal silica suspension diluted with water to about 10 to 30% concentration by weight and etching the surface of the polished piezoelectric material in an approximate 1:50:150 solution of HCl:HF:H.sub.2 O at about 70.degree. C.
    Type: Grant
    Filed: September 26, 1994
    Date of Patent: February 25, 1997
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Sally M. Laffey, John R. Vig, Mary A. Hendrickson
  • Patent number: 5604392
    Abstract: A crystal resonator in an electrodeless configuration is electrically levitated by a resonant circuit. A quartz plate (or other piezoelectric substrate) is levitated by a resonant circuit which includes an inductor that is external to a housing and a parallel plate capacitor that is inside the housing. The parallel plate capacitor consists of three plates, two of which are mounted edge to edge on a nonconductive housing with a small space between them and the third of which is a conducting surface on the quartz plate being levitated. This is an open circuit configuration which requires no feedback sensor circuitry. The resonator, after being levitated, is then electrically addressed in any number of electrodeless configurations.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: February 18, 1997
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: John R. Vig
  • Patent number: 5601948
    Abstract: A porous carbon black or manganese dioxide cathode, or a lithium, magnesi calcium, zinc, or cadmium anode, is treated under vacuum with a gas plasma. The treated electrode is suitable for inclusion in a nonaqueous electrolyte cell and improves cell performance.
    Type: Grant
    Filed: April 11, 1995
    Date of Patent: February 11, 1997
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Michael Binder, Robert J. Mammone, William L. Wade, Jr.
  • Patent number: 5600535
    Abstract: This invention relates to a novel electrode material for electrochemical ) capacitors. This invention also relates to a novel method for making such electrode. The electrode material is an amorphous phase of ruthenium oxide formed directly on titanium (Ti) substrate. The method is the application of heat on the Ti substrate which is wetted by metal alkoxide precursor. The method produces film which adheres to the substrate before and after charge/discharge cycling. As a result, the EC capacitors made of the electrode exhibit high power and also high energy which is higher than that of the traditional crystalline phase of ruthenium oxide thin film on Ti. This type of capacitor is especially suited for burst communication which requires energy with high power density, high energy density, and high cycle life at medium to low voltages (10-20 volts).
    Type: Grant
    Filed: December 9, 1994
    Date of Patent: February 4, 1997
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: T. Richard Jow, Jian-Ping Zheng
  • Patent number: 5599643
    Abstract: A new cathode material, Li.sub.2 CuO.sub.2, is used in lithium electrocheal cells.
    Type: Grant
    Filed: November 8, 1995
    Date of Patent: February 4, 1997
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Edward J. Plichta, Wishvender K. Behl
  • Patent number: 5596365
    Abstract: An image stabilization system for telescopic devices uses a method of selecting a suitable, stationary reference image. The user of the instrument views a circular image and a translucent ring concentric to and at an outer edge within the circular image. A translucent circle is superimposed within the width of the concentric ring so as to be able to move along the concentric ring to obtain a reference image. In order to select the reference image, the translucent circle travels, by viewer command, around the concentric ring until a suitable stationary image is observed within the translucent circle. Translation of the reference image within the concentric ring may be reactivated on command as many times as required to get an optimally stationary reference image. Image matching algorithms are then used to determine if the viewing area has moved by keying on and matching the vector movement of the reference image.
    Type: Grant
    Filed: January 13, 1995
    Date of Patent: January 21, 1997
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: John M. Erickson, Philip B. Crichton
  • Patent number: 5585330
    Abstract: A high-temperature superconductor (HT.sub.c S) in a microstrip configurat which is electrically related to a superconducting coupler and which is controlled by a heater disposed over the superconducting microstrip line. This limiter configuration is used in a series configuration with other circuitry and utilizes the low loss characteristics of the HT.sub.c S material and the wide bandwidth characteristics of microstrip. The structure itself is a five layer microstrip geometry which includes a normal metal ground plane; a dielectric substrate disposed on the metal ground plane; a superconducting microstrip transmission disposed on the substrate; a dielectric film layer disposed on the superconducting microstrip; and a heating element disposed on the dielectric film layer and over the superconducting microstrip.
    Type: Grant
    Filed: January 9, 1995
    Date of Patent: December 17, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Roland Cadotte, Jr., Richard W. Babbitt, Xiaoguang G. Sun
  • Patent number: 5586251
    Abstract: A monitoring system for a network having a plurality of segments including plurality of identical monitoring instruments respectively connected to the segments. Each monitoring instrument includes an interconnection circuit card for connecting to its segment, a microcomputer circuit card connected to the interconnection circuit card, an interface circuit card connected to the microcomputer circuit card, a plurality of status lamps respectively connected to the interface circuit card, a plurality of switches for providing self testing, resetting, alarm, instrument selecting, segment selecting, connected to the interface circuit card, and a plurality of switches for providing transmit/receiving or transmitting only, a monitor mode, a verify mode, and an auto fault mode, connected to the interface circuit card.
    Type: Grant
    Filed: May 13, 1993
    Date of Patent: December 17, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: James A. Coleman, Paul F. Sass, Frank J. Halloran, Allan T. Senesey
  • Patent number: 5578890
    Abstract: An improved crystal resonator package is provided using high purity alumi.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: November 26, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: John R. Vig
  • Patent number: 5579331
    Abstract: A quantum-well semiconductor laser/amplifier mounted on a highly conductive semiconductor substrate. Inactive regions include a highly doped N-region and a highly doped P-region. The N-region is composed of semiconductor material mounted on the substrate. The active region includes a quantum-well heterostructure of intrinsic semiconductor material that mounts on the N-region. The quantum-well structure includes a series of quantum wells, each having barrier layers, quantum-well layers, and a delta-strained layer mounted near the center of the quantum wells. The delta-strained layers are very thin, being formed from a number of mono-layers of semiconductor material. There is a large lattice mismatch between each of the delta-strained layers and its adjacent quantum-well layers. The band edges of the quantum-well layers and the delta-strained layers are located at substantially the same level. The P-region is composed of a semiconductor material that mounts on the quantum-well structure.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: November 26, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Paul H. Shen, Paul W. Cooke, Wayne H. Chang
  • Patent number: 5570035
    Abstract: Apparatus for providing a direct indication of the failure of an electronic ircuit including a built-in self test circuit which performs an initial test on the electronic circuit and having a visual indicator coupled thereto which becomes activated when the self test circuit senses a failure of the electronic circuit upon power being supplied thereto or during operation. The electronic circuit with the built-in test feature consists of an integrated circuit chip or a multi-chip module encapsulated in a package with the indicator means visible therethrough. The indicator consists either of a light emitting diode or fusible material which changes its appearance and becomes visible through the package upon being activated by the built-in self test circuit.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: October 29, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Michael A. Dukes, Gerald T. Michael
  • Patent number: 5569943
    Abstract: A heterostructure semiconductor device having source and drain electrodes sistively coupled to opposite ends of a channel, a barrier layer on one side of the channel, a delta doped layer in the channel or within a given distance of it, a gate electrode on the barrier so as to form a Schottky diode and at least one collector electrode mounted on said barrier layer. The collector electrode or electrodes can be resistively coupled to the barrier layer, but preferably the coupling is such as to form a Schottky diode. Changes to the gate bias affect the source current through the field effect mechanism. The collector current depends on the transfer of heated, energized carriers out of the channel over the front heterobarrier. At low gate bias, electrons entering the source travel to the drain while none travel to the collector. Energized carriers are localized to the depletion region due its high electric field drop.
    Type: Grant
    Filed: September 1, 1995
    Date of Patent: October 29, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Thomas E. Koscica, Jian H. Zhao
  • Patent number: 5567936
    Abstract: A reference locket for use in calibrating a radiac computer indicator or trument having a light emitting diode or LED. The present invention is an inexpensive stable device having a base, a retainer placed in the base holding a light emitting diode or LED, and a cover forming a reference locket. The reference locket is placed in a radiac computer indicator or instrument for calibration. A forward constant current pulse provided to the LED results in electromagnetic radiation or light that simulates a gamma dose. The characteristic junction resistance of the LED simulates a neutron reading. The present invention replaces a conventional reference locket having a silver activated phosphate glass and a neutron diode. The phosphate glass blocks have exhibited unexplained increases in the previously calibrated gamma doses. Therefore, calibration or reference lockets using phosphate glass may be unstable.
    Type: Grant
    Filed: June 23, 1995
    Date of Patent: October 22, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Michael J. Basso
  • Patent number: 5567973
    Abstract: An FET or MESFET having a semiconductor optically transparent gate. A substrate having a doped channel placed thereon together with a source and a drain with a semiconductor gate formed therebetween may be manufactured using conventional semiconductor manufacturing techniques. The optically transparent highly doped semiconductor gate forms an n+-n junction with the n-type doped channel. This junction is modulated or changed by an optical signal causing a photovoltaic effect that reduces the barrier potential at the n+-n junction resulting in a depletion of the accumulation region. This results in increased flow of current in the doped channel. The transparent highly doped semiconductor gate increases performance of the FET or MESFET optical detector. This is an improvement over conventional metal semiconductor field-effect transistor (MESFET) technology, and can be applied to microwave monolithic integrated circuits (MMIC).
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: October 22, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Arthur Paolella, Bahram Nabet
  • Patent number: 5561305
    Abstract: A method and apparatus for finding internal charge flow distribution in a dual-channel field effect semiconductor device having at least two source terminals, two drain terminals, a control gate and two isolation gates. Electrical energy of different frequencies is applied to different ones of the source terminals for causing currents to flow in each of the channels between the source and drain terminals. Using the isolation gates to achieve channel pinch off, one of the drain terminals and one of the source terminals are selectively coupled to only one of the channels. A control signal is applied to the control gate for controlling the amount of the electrical energy conducting in each of the channels. Data is collected by measuring currents at the different frequencies at each of the drain terminals while a magnetic field perpendicular to the plane of the channels is varied.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: October 1, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Doran D. Smith
  • Patent number: 5560783
    Abstract: A thermophotovoltaic generator for use in generating electricity using a or liquid fueled light emitter and an absorber with photocells, is provided. This generator includes a burner and mantle light emitter, and includes a multi-layer absorber having cylindrical layers of peripherally spaced tube units, each unit having end wall photocells which form a chamber that contains a dye.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: October 1, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Robert P. Hamlen
  • Patent number: H1605
    Abstract: A closed flexible superconductive ribbon, is made to confine magnetic flux nd which is thereafter elongated and selectively twisted to form a desired type of magnetic field. The shape of the twist is varied for the particular application. A helical field source for twister type geometries, for example, can be implemented by winding the stretched superconducting loop around a cylindrical tube. In another embodiment, the superconductive ribbon is twisted into two halves, one of which is rotated 180.degree. with respect to the other. In such a configuration, two fields exist which are mutually opposite to each other.
    Type: Grant
    Filed: January 27, 1992
    Date of Patent: November 5, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Herbert A. Leupold
  • Patent number: H1606
    Abstract: A quasi-passive identification system having an interrogator and a passive ransponder. The interrogator has a signal generator that generates radio-frequency energy under the control of a manual actuator. A preset encoder encodes the radio-frequency energy with an interrogation code to produce an interrogation signal that is radiated by an antenna. The transponder has an receiver for receiving the interrogation signal and separating it into received radio-frequency energy and a coded signal. A decoder decodes the coded signal and looks for a match between the coded signal and the interrogation code. A response transmitter, which is controlled by the decoder, encodes the received radio-frequency energy with the response code and radiates the response signal. When a receiver in the interrogator receives the response signal, the response signal is decoded and analyzed for a proper response. A response indicator is energized when a proper response is received.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: November 5, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Vladimir G. Gelnovatch, Bruce D. Jette