Patents Represented by Attorney, Agent or Law Firm Jacob Shuster
  • Crosstie random access memory element and a process for the fabrication thereof
    Patent number: 5197025
    Abstract: A nonvolatile random access memory is formed by thin permalloy shaped into "wiggle" patterns and magnetized to establish a plurality of memory cells arranged into an array. Magnetic domain walls are formed at apexes of the "wiggle" pattern in each memory cell after a predetermined magnetic field is applied along the hard axis of the memory cell array by magnetization so aligned. Row address lines for reading and writing into the memory cells and column address lines for writing into the memory cells are provided to conduct currents through each column of the array for magnetoresistance readout.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: March 23, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Leonard J. Schwee, Paul E. Hunter
  • Thrust expansion engine
    Patent number: 5193475
    Abstract: Break-up activity of water by injection of hot propellant gas into channels f a thrust expansion engine is suppressed to prevent rapid cooling of the gas, utilizing one or more methods including injection of a secondary inflow of the propellant gas and/or the water under lower pressures into the channels, injection of a viscosity enhancer and/or surfactant into the inflow stream of the water and restricting outflow of the water from the channels by means of convergent nozzles.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: March 16, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Carl T. Zovko
  • Aimable warhead
    Patent number: 5182418
    Abstract: An aimable warhead in which a plurality of detonators is disposed about the eriphery of an explosive charge with a proximity selector means provided for sensing the location of a target in relation to the warhead and thereafter selectively initiating one of the detontators opposite the side from which the explosion is to be directed in order that the resulting explosion wave may be directed toward the target.
    Type: Grant
    Filed: June 21, 1965
    Date of Patent: January 26, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: James C. Talley
  • Centroid target tracking system utilizing parallel processing of digital data patterns
    Patent number: 5175694
    Abstract: Outputs from data bit areas of a target sensing array, above a signal throld level, are obtained by sequential scanning of groups of the data bit area aligned in columns and rows to form a digital pattern of binary data interrogated to determined the offset of the digital pattern from the centroid of the sensor array. Interrogation is performed by simultaneous counting of data bit pulses derived from separate segments of each group on opposite sides of the centroid and comparing such summations to determine the differences therebetween reflecting directional offsets from the centroid.
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: December 29, 1992
    Assignee: The United States of America as represented by The Secretary of the Navy
    Inventor: Gaetano T. Amato
  • Magnetic multilayer strain gage
    Patent number: 5168760
    Abstract: A strain gauge comprised of a magnetic multilayer assembly exhibiting spialve effect with individual ferromagnetic layers possessing magnetostrictive properties. A magnetic field source is used to bias the magnetic moments of the ferromagnetic layers in a given direction whereby stress applied causes previously antiferromagnetically coupled moments to be angularly realigned toward a ferromagnetic arrangement. Such realignment causes a corresponding resistance change of unexpectedly high magnitude thereby providing a highly sensitive strain gauge.
    Type: Grant
    Filed: November 1, 1991
    Date of Patent: December 8, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Marilyn Wun-Fogle, Arthur E. Clark, Kristl B. Hathaway
  • Crosstie random access memory element having associated read/write circuitry
    Patent number: 5165087
    Abstract: A crosstie random access memory system for reading and/or writing, utilizing permalloy thin films patterned into "wiggle" shapes to form a plurality of memory cells in an array. Address lines for reading and/or writing into the memory cells are operative through associated circuitry for writing at selected locations in the array using coincident currents. Current passed through each column of memory cells effects magnetoresistance readout in conjunction with row address lines by means of the aforementioned associated circuitry which is arranged so as to be integrated on a single substrate with the memory array.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: November 17, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Leonard J. Schwee
  • Radiation selective system for target range and imaging readout
    Patent number: 5161125
    Abstract: Optical radiation is propagated through an attenuating medium to a target om which it is reflected and picked up by an echo receiver system to provide ranging and imaging data during one mode of operation. The optical radiation is transformed into acoustical pulse energy alternatively radiated to and reflected from the target in another mode of operation. The operational mode is selected so as to optimize the data extracted from the echo receiver system under different conditions affecting receiver reception.
    Type: Grant
    Filed: May 5, 1992
    Date of Patent: November 3, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Bruce Maccabee
  • Hot water storage tank for solar collectors
    Patent number: 5159918
    Abstract: A baffled hot storage tank for solar collector systems is provided. The t includes a concentric cylindrical baffle having a circulation port at the bottom of the baffle and another circulation port at the top of the baffle. This configuration restricts the mixing of water allowing both a vertical temperature gradient and a lateral gradient to be maintained. The maintaining of hot water at the desired supply termperature is restricted to only the upper section of the center core inside the baffle. This location reduces radiant heat loss. Additionally, inlet and outlet pipes are also positioned to take advantage of the tank temperature gradients.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: November 3, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: James S. Roehl
  • Optical tracking of charged particle beams
    Patent number: 5151746
    Abstract: Radiated images of the propagation path of a charged particle beam simultously projected to spaced points on a platform, are recorded therat by path tracking video cameras. Data on the positional orientations of the path tracking cameras during reception of simultaneously projected images, measured by inertial sensors, is utilized to calculate the location and direction of the beam propagation path by iterative triangulation.
    Type: Grant
    Filed: April 1, 1991
    Date of Patent: September 29, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Irving L. Kofsky, Christian A. Trowbridge
  • Infrared fiber-optical temperature sensor
    Patent number: 5145257
    Abstract: A temperature sensor comprising a probe, infrared fibers, super-cooled detors and their associated electronics, and a computer for determining the temperature from the output of the electronics. Photons from a heat source are collected by the infrared fibers and transmitted to the detectors where they are amplified by the electronics. A voltage is then outputted which represents measured temperature. The voltage is sampled by the computer where it is converted to temperature by use of computer algorithms.
    Type: Grant
    Filed: August 12, 1991
    Date of Patent: September 8, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: James E. Bryant, John E. Bennett, William H. Pinkston
  • High power microwave generator
    Patent number: 5142250
    Abstract: Conversion of electron beam energy into high power microwave energy is efted within the cavity of a Klystron device to which the electron beam is accelerated from a continuous supply source through an ion focussing channel. Ion focussing is achieved by establishment of a preionized background plasma within the channel to modulate the current of the electron beam in response to wake field effects and cause bunching of the electron beam during propagation to the Klystron device.
    Type: Grant
    Filed: January 14, 1992
    Date of Patent: August 25, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Han S. Uhm, Khanh T. Nguyen
  • Safety and arming system for tube launched projectile
    Patent number: 5131328
    Abstract: An inertia element within a projectile is displaced to a retracted position y acceleration of the projectile during launch to unblock displacement of a slider to an armed position in response to subsequent pressurization of a projectile flight motor. Safe separation timers are thereby enabled in response to proper launch to delay pressurization of the flight motor and powering of an explosive firing circuit through switches actuated by said displacement of the slider from a safe position to the armed position. The slider is held in its safe position by an electrically grounded shear wire that is ruptured in response to slider displacement thereby removing a power disabling shunt connection to the firing circuit.
    Type: Grant
    Filed: December 13, 1991
    Date of Patent: July 21, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Steve N. Chan
  • Microchannel electron source
    Patent number: 5132586
    Abstract: A microchannel plate device utilizing a semiconducting bulk material is cacterized by electron emissions of high output current density and efficiency. The channel passages in the plate device which are square in cross-section accommodates a larger open area ratio at the input and output plate surfaces. An extended range of high electron emission applications for the plate device is provided. Such applications may include a photocathode installation to which a modulation pulse input is applied under low voltages isolated from high post-accelerating voltages.
    Type: Grant
    Filed: April 4, 1991
    Date of Patent: July 21, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kevin Boulais, Joon Choe
  • Cable connector/adapter support for multi-terminal data processors
    Patent number: 5130890
    Abstract: A support panel movably mounted on the cabinet of a multi-terminal data pessor, carries retainers releasably holding cable connectors, disconnected from the processor terminals, in an orderly arrangement to protect the connectors from damage and facilitate proper plug in handling.
    Type: Grant
    Filed: September 10, 1991
    Date of Patent: July 14, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: David H. Nhu
  • Payout tension control system for reel mounted cable
    Patent number: 5120024
    Abstract: A payout control arm is angularly displaceable about a brake shaft during yout of a cable from a storage reel in response to tensioning forces transmitted through the cable from a payout load, the cable being entrained about a pulley rotatably carried on the control arm in spaced relation to the brake shaft. Gearing drivingly connects the pulley to the brake shaft to stop payout and cause the cable to frictionally grip the pulley in response to brake engagement thereby preventing continued transmittal of tensioning forces to the reel.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: June 9, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Gerhard B. Winkler
  • Booster rocket range safety system
    Patent number: 5117758
    Abstract: In response to an abort command, fragmentation of a propellant booster rot carried on a missile is limited by positioning of annular shaped charges at axially spaced locations on the outer shell of the booster rocket. Detonation of the charges thereby severs an intermediate section of the rocket from forward and aft sections which remain attached to the missile. The intermediate section is separated from the missile by such severing action to prevent further fragmenting forces from being imparted thereto.
    Type: Grant
    Filed: September 25, 1991
    Date of Patent: June 2, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: John R. Renzi
  • Three dimensional range imaging system
    Patent number: 5110203
    Abstract: A pulse of luminant energy of short duration is reflected from a target as n echo source of both two dimensional target imaging data and target depth distance data by optical gating of the echo pulse at one receiving location. The pulse is thereby divided into image depth slices under control of timing signals in order to extract therefrom three dimensional imaging data during its short duration.
    Type: Grant
    Filed: August 28, 1991
    Date of Patent: May 5, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Bruce S. MacCabee
  • Impulse transmitter and quantum detection radar system
    Patent number: 5095312
    Abstract: Pulses of short duration are radiated by an impulse radar transmitter wit time domain intervals under control of a clock to monitor a moving target from which echo pulses are reflected. The echo pulses received are measured by a quantum detector in terms of photon energy levels to supply signal data processed during periods between said time domain intervals.
    Type: Grant
    Filed: April 12, 1991
    Date of Patent: March 10, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert E. Jehle, David F. Hudson
  • Phase cancellation enhancement of ultrasonic evaluation of metal-to-elastomer bonding
    Patent number: 5088327
    Abstract: Acoustical radiation is generated and applied to the bonding interface between a radiation transmission material and a radiation attenuating material to determine adhesion quality by extraction of data from a response signal produced by echoes reflected from both the interface and the radiation entry surface on the radiation transmissive material exposed to the generated acoustical radiation. Signal phase cancellation between the echoes from the entry surface and bonding interface produce a signal signature from which the quality of bonding is evaluated. By partial attenuation of the echo from the entry surface, the signature is maximized.
    Type: Grant
    Filed: May 17, 1990
    Date of Patent: February 18, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Paul M. Gammell
  • Semiconductor heterojunction device with graded bandgap
    Patent number: 5061973
    Abstract: The semiconductor materials of junction forming layers of a heterojunction tructure are interfaced by a gap region that is graded by degree of alloying of those components of an interfacing material which are respectively compounded in the semiconductor materials of the junction forming layers having different bandgaps and band edges that are aligned by the grading of the interfacing gap region to selectively control rectifying junction characteristics.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: October 29, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Tak-Kin Chu