| Patent Number |
Title Of Patent |
Date Issued |
| 5448179 |
Screening of conductors and contacts on microelectronic devices |
September 5, 1995 |
| A method is disclosed for testing or screening metal or polysilicon conductors and contacts on microelectronic devices that it uses a modified design layout for individual logic gates to enable high current density testing of all such elements used in the final functional circuit. The |
| 5448085 |
Limited current density field effect transistor with buried source and drain |
September 5, 1995 |
| A buried source and drain microwave field effect transistor which provides reduced current density and reduced electric field intensity near the transistor's surface region is disclosed. Operating life and reliability of the transistor are improved by the buried source and drain structur |
| 5447582 |
Method to refine the microstructure of .alpha.-2 titanium aluminide-based cast and ingot metallu |
September 5, 1995 |
| The microstructure of alpha-2 and orthorhombic titanium aluminide alloy cast and ingot metallurgy articles is refined by: (a) hydrogenating the article at a temperature at or slightly below the .beta.-transus temperature of the alloy; (b) cooling the article, under a positive partial |
| 5447580 |
Rapid heat treatment of nonferrous metals and alloys to obtain graded microstructures |
September 5, 1995 |
| A method for heat treatment of nonferrous metals and alloys is described which comprises the steps of providing a billet of material comprising nonferrous metal or alloy; rapidly heating the billet to a temperature higher than the transus or solvus temperature of the material whereby a |
| 5444308 |
Nanosecond transmission line charging apparatus |
August 22, 1995 |
| A device for charging PFLs (Pulse Forming Lines) on a time scale of a few nanoseconds. The device includes a source transmission line (STL) connected through a switch to a pulse forming transmission line. The source line is initially charged while the PFL is uncharged, and the switch |
| 5442654 |
Phase modulation measurement system |
August 15, 1995 |
| Telemetry signals from missiles experience extreme phase distortion during interstage separation events. A phase modulation measurement system can calculate the steady state phase deviation of a biphase telemetry transmitter using: a telemetry receiver, a demodulator, a digitizer osc |
| 5438632 |
Joint transform correlator using a 4-F lens system to achieve virtual displacement along the opt |
August 1, 1995 |
| A 4-f lens system is positioned over one half of the joint input image presentation SLM device of a conventional joint transform correlator (JTC). An image displacement lens is positioned in the Fourier transform plane of the 4-f correlator and can shift the virtual displacement of the |
| 5434816 |
Two-transistor dynamic random-access memory cell having a common read/write terminal |
July 18, 1995 |
| A two transistor dynamic random access memory can be treated as a pair of voltage controlled elements which are reversibly controlled in a three step process. In the first step, a capacitance is charged on the controlling terminal of memory transistor. The second step entails isolati |
| 5434576 |
Optimized subarray amplitude tapers for array antennas |
July 18, 1995 |
| A method for economically producing low sidelobe levels in the far field pattern of an array antenna is disclosed. The current fed to the subarrays is identically tapered to the elements of each subarray. Both the subarray current taper and the element current tapers are optimized to yie |
| 5432681 |
Density improvement for planar hybrid wafer scale integration |
July 11, 1995 |
| Chip-like stacks of thinned chips are mounted in wells etched into a substrate. A "chip-like" stack is a stack of chips, which in the aggregate have a height approximately equal to that of a single conventional chip. These chip-like stacks are mounted in a variety of packages. In a p |
| 5432523 |
Elliptical near field test facility |
July 11, 1995 |
| In order to measure the far field antenna pattern of a phased array antenna, the phased array is focused at a probe antenna which is a specific distance away from the aperture. The antenna pattern is then measured by moving the probe antenna on an elliptical arc about the antenna und |
| 5431125 |
Twin-free crystal growth of III-V semiconductor material |
July 11, 1995 |
| Twin-free (100) InP crystals of large dimensions and having flat crowns are produced by combining the magnetic liquid encapsulated Kyropoulos (MLEK) process and the magnetic liquid encapsulated Czochralski (MLEC) process. Observation of the flat crown by high intensity light ensures twin |
| 5429963 |
Twin-tub complementary heterostructure field effect transistor fab process |
July 4, 1995 |
| This is a fabrication process for complementary III-V HFETs in which devices are built side-by-side in doped-areas, known as "tubs", grown by molecular beam epitaxy on indium phosphide (InP) substrates, or other material systems such as materials grown on GaAs substrates. The layers |
| 5429877 |
Internally reinforced hollow titanium alloy components |
July 4, 1995 |
| An internally reinforced hollow structure is described which comprises a layer of titanium metal matrix composite applied to the internal surfaces of structural segments comprising the hollow structure, the segments then being joined to form the desired hollow structure. |
| 5429693 |
Method of making a prestressed composite materials |
July 4, 1995 |
| A method is described for forming a prestressed composite which comprises steps of applying matrix material to the fibers, selectively tensioning the fibers, winding the fibers on an adjustable mandrel and curing the matrix material with the fibers under tension. |
| 5428452 |
Optical fourier transform method for detecting irregularities upon two-dimensional sheet materia |
June 27, 1995 |
| The rapidly moving uniform surface being inspected is illuminated with either laser or wide-band light. The Fourier transform of the surface is produced upon the detector plane of an electronic camera. In the absence of defects, the transform light energy is produced only in the center o |
| 5428218 |
Variable time-delay system for broadband phased array and other transversal filtering applicatio |
June 27, 1995 |
| A variable time delay system for broadband phased array receive and other transversal filtering applications is disclosed and employs a segmented mirror device (SMD) and a linear fiber array to realize a quantized variable delay line. The use of the SMD allows for extremely high packing |
| 5427629 |
Coverplate for silicon solar cells |
June 27, 1995 |
| A silicon solar cell having a coverplate made of .beta.-silicon carbide. |
| 5426785 |
Comparator stack architecture for order statistic filtering of digital imagery |
June 20, 1995 |
| This is a circuit design for determining the order statistics of an arbitrary (length and value) string of numbers as the string is acquired. The circuit is intended for use with a system covered by my copending application titled "A High Performance Architecture for Image Processing", |
| 5426173 |
Two-dimensional benzobisoxazole rigid-rod polymers |
June 20, 1995 |
| A two-dimensional, rigid-rod polymer of the formula: ##STR1## wherein x, y and z each has a value of 5 to 40; wherein the sum of x, y and z is about 20 to 100; and wherein PBX is a repeating group of the formula: ##STR2## is prepared by the polycondensation of trimeric acid ( |
| 5425044 |
Compact, burst mode, pulsed, high energy, blowdown flow photolytic atomic iodine laser |
June 13, 1995 |
| A compact, high-repetitively(rep)-rate photolytic atomic iodine laser (PIL) using blowdown flow and cryogenic pumping increases the rep rate from 0.5 Hz to at least 10 Hz. The average power of the pulsed laser increases from 35 to 700 Watts output. The present invention maintains the dem |
| 5424749 |
Vibrating object assessment from a pulse operated vibrating sensor |
June 13, 1995 |
| A distant target vibration assessment and signature determining apparatus for operation from a vibrating platform such as an aircraft or helicopter. The disclosed system employs pulse illumination of the distant target and of nearby atmospheric aerosol particles and uses the latter illum |
| 5424027 |
Method to produce hot-worked gamma titanium aluminide articles |
June 13, 1995 |
| A method for producing hot worked gamma titanium aluminide alloy articles which comprises the steps of:(a) providing a prealloyed gamma titanium aluminide alloy powder;(b) filling a suitable die or mold with the powder;(c) hot isostatic press (HIP) consolidating the powder in the filled mold |
| 5423223 |
Fatigue detection in steel using squid magnetometry |
June 13, 1995 |
| The magnetoelectric coefficient in iron-based alloys has a stress value of about 0.6 of that of the elastic limit. A reversal in sign is caused by structural phase slip which is the basis for the onset of metal fatigue. Based on this phenomenon, a method is provided for determining the o |
| 5422047 |
Carbonaceous fuel particles |
June 6, 1995 |
| Provided is a method for making high-temperature high-performance fuel particles wherein fertile or fissile metal carbides are dispersed in spherical graphite skeletons. That is, a fissile metal salt, such as uranyl nitrate, is added to an aqua-mesophase in alkaline solution, to form |
| 5419787 |
Stress reduced insulator |
May 30, 1995 |
| An insulating film with low thermal expansion characteristics is formed by depositing aluminum alloy materials in thin film form without the use of high temperatures and which can then be oxidized to create an insulating film which has low stress. A mixture of aluminum and magnesium oxid |
| 5418708 |
Constant power load bank |
May 23, 1995 |
| The constant power load bank is a flexible tool used for simulating avionics loads such as pulsing radars on a 270 VDC power system. The unique feature of this load bank is that it is designed to realistically simulate an active aperture radar with 0-100% of the load pulsing while th |
| 5418640 |
Spatially graded optical switch |
May 23, 1995 |
| A spatially graded optical switch is described which comprises a transparent substrate, a layer of optically switchable material deposited on the substrate and having optical thickness which is a preselected function of radial distance from the center of the substrate, and electrical |
| 5417781 |
Method to produce gamma titanium aluminide articles having improved properties |
May 23, 1995 |
| Gamma titanium aluminide alloy articles having improved properties are produced by the following methods:The first of these methods comprises the steps of: (a) heat treating an alloy billet or preform at a temperature in the approximate range of T.sub..alpha. to T.sub..alpha. +100.degree |
| 5417441 |
Low friction seal between relatively moving parts |
May 23, 1995 |
| The invention provides a low friction gas seal between moving and stationary parts in the exhaust nozzle of a gas turbine engine. Such seal is in the form of a roller mounted on a pair of pivot arms to the movable member, which roller rides on the stationary part in sealing engagement |
| 5416489 |
Substitution procedure and apparatus for phased array error correction |
May 16, 1995 |
| A technique that enables array error correction by replacing the signals from failed elements with processed signals derived from operating elements. The procedure is shown to be useful in a multisignal environment. Expressions are derived that give the signal to noise ratio of array |
| 5411902 |
Process for improving gallium arsenide field effect transistor performance using an aluminum ars |
May 2, 1995 |
| The incorporation of an aluminum arsenide (AlAs) buffer layer in a gallium arsenide (GaAs) field effect transistor (FET) structure is found to improve the overall device performance, particularly in the high temperature operating regime. Similar characteristics may be obtained from d |
| 5411895 |
Hybrid multiple quantum well spatial light modulator |
May 2, 1995 |
| A method for fabricating a hybrid MQW spatial light modulator is described which comprises steps of depositing on a substrate in sequence a first layer to preselected thickness of n+ (or p+) semiconductor material, a second layer to preselected thickness of intrinsic semiconductor materi |
| 5410558 |
Variable short period electron beam wiggler for free electron lasers |
April 25, 1995 |
| The free electron laser wiggler has therein a device for generating a variable short period wiggler field. A Type II superconducting material is formed into a field modifying means having a channel therein through which a beam of free electrons travels. The field modifying means is held |
| 5410166 |
P-N junction negative electron affinity cathode |
April 25, 1995 |
| A cold cathode electron sourcing arrangement wherein a negative electron affinity material such as p-type diamond is disposed adjacent a p-n junction in order that electron charge carriers originating in the p-n junction may be caused to flood the p-type diamond and increase its elec |
| 5407237 |
Flexible coupling |
April 18, 1995 |
| A flexible coupling is provided for two relatively movable pipes, which coupling hasa) a bellows tube having transversely corrugated sidewalls which bellows terminates in two rounded nozzles, which nozzles insert into connecting pipes, (e.g. in the air bypass duct of a gas turbine engine |
| 5406287 |
Programmable airdrop infrared decoy |
April 11, 1995 |
| A battery powered self-contained source of infrared or other optical spectrum emission is disclosed. The emission source is provided with airdrop and other dispersal arrangements and is disposed in the form of an enclosed spherical or other housing which includes adjustment ports, ad |
| 5406072 |
Method for microbeam ion radiation testing of photonic devices |
April 11, 1995 |
| The disclosed method is for radiation testing of a nanostructure photonic device under test (DUT). The method comprises the application of a beam of optical energy to the DUT, and then establishing a computer data base for the performance of the device under test during the application o |
| 5405108 |
Space debris clearing device |
April 11, 1995 |
| The space debris clearing device of the invention, following launch and placement in or near an orbit considered to be highly populated with debris, is intended to clear the debris allowing safe paths and orbits for space assets. The device is made of a castable, energetic material, and |
| 5404007 |
Radiation resistant RLG detector systems |
April 4, 1995 |
| A ring laser gyro, RLG, is a highly accurate optical rotation sensor using counter propagating light beams to sense rotation as a rate integrating gyro. There is however, the problem of RLG blindness or loss of output data during high energy radiation, which frequently incapacitates the |
| 5403411 |
Method for increasing the fracture resistance of titanium composites |
April 4, 1995 |
| The fracture resistance of titanium alloy matrix composites is increased by one of two methods. One method comprises the steps of consolidating a titanium alloy-fiber preform under suitable conditions to provide a metal matrix composite and thermally treating the thus-prepared composite |
| 5403153 |
Hollow composite turbine blade |
April 4, 1995 |
| The invention provides a woven composite lightweight turbine blade in which, e.g. ceramic or carbon fibers are woven around a foam core in the airfoil section of the blade and around a removable mandrel in the dovetail section of the blade, and braided at the tip and root thereof to |
| 5396425 |
Vertical velocity indicator |
March 7, 1995 |
| A vertical velocity indicator for aircraft is described which comprises an inlet open to ambient static pressure; a pressure transducer communicating with the inlet for detecting changes in ambient static pressure and providing output signals corresponding to equilibrium with ambient |
| 5396359 |
Node for grid type single mode fiber optic local area network using tunable filters |
March 7, 1995 |
| Apparatus for processing data packets within a grid-based mesh network having a plurality of particular nodes at the intersections of rows and columns of data transmission links which link the nodes together, which apparatus can determine if a particular incoming data packet has prev |
| 5396250 |
Spectral estimation of radar time-of-arrival periodicities |
March 7, 1995 |
| Disclosed is a method to extract the periodic properties (or Pulse Repetition Intervals (PRIs)) of radar signals whose time-of-arrival at an airborne platform have been time tagged by an Electronic Warfare (EW) receiver. The PRIs are determined using a modified Discrete Fourier Trans |
| 5396243 |
Infrared laser battlefield identification beacon |
March 7, 1995 |
| An Identification Friend or Foe (IFF) system uses CO.sub.2 laser identification beacons on ground vehicles such as tanks, in conjunction with an existing (or future) Forward Looking InfraRed (FLIR) detection system on an attacking aircraft or ground vehicle, to provide a cost effecti |
| 5396069 |
Portable monocular night vision apparatus |
March 7, 1995 |
| A monocular night vision apparatus employing an infrared energy spectrum source of illumination and a camera lens and night vision image intensifier combined receiver apparatus into a small hand-held portable package that is both low in cost and reliable in nature is described. The n |
| 5392988 |
Uniform droplet generator |
February 28, 1995 |
| The uniform droplet injector assembly is a rigid, low mass injector having a plurality of nozzles therein attached to a manifold. The manifold vibrates by piezoelectric actuators and springs in combination. The droplet injector array allows the process stream to flow through the inje |
| 5377210 |
Self-pumped optical phase conjugation with a sodium Raman laser |
December 27, 1994 |
| A three-level atomic system in a resonance Raman configuration is provided, and self-pumped optical phase conjugation is performed in which the pumps are self-induced as standing waves in a Raman laser. Self-pumped reflectivities approaching five percent are obtained for input intensitie |
| 5376626 |
Magnetic field operated superconductor switch |
December 27, 1994 |
| A superconducting switch is composed of anisotropic magnetic material. The switch has a first superconducting section, a variable resistive section and a second superconducting section. An external magnetic field is applied so that the first and second superconducting sections remain |
