| Patent Number |
Title Of Patent |
Date Issued |
| 5334205 |
Sacroiliac joint fixation guide |
August 2, 1994 |
| A novel guide or jig for safe and accurate placement of fixation screws across a sacroiliac joint uses the tip of a sacro-pedicle targeting screw inserted from the rear into a human sacrum as a target for guiding fixation screws. The head of the targeting screw attaches to one end of a |
| 5330495 |
Disposable grafting knife |
July 19, 1994 |
| A disposable gingival grafting knife is described which comprises a narrow blade sharpened on one side, formed to define a preselected cross-sectional shape of the graft and embedded into the end of a sterilizable handle to define preselected width and thickness for the graft, and a |
| 5329286 |
Method for two dimensional doppler imaging of radar targets |
July 12, 1994 |
| A method for two dimensional imaging of a two or three dimensional target is disclosed. As shown, a radar transmitter transmits a beam on a beam axis originating at a position spaced from the target and a radar receiver receives return signals from the target. The stationary radar observ |
| 5329137 |
Integrated total internal reflection optical switch utilizing charge storage in a quantum well |
July 12, 1994 |
| An optical switch comprises a heterojunction transistor having a source electrode, a gate, a mesa, and three self-aligned waveguides, the mesa being ion implanted and having a single quantum well under the gate electrode, the single quantum well being comprises of undoped, narrow ban |
| 5327998 |
Lubrication by sublimation |
July 12, 1994 |
| System and method for high temperature lubrication of a bearing surface of a movable machine part using lubricant sublimation is described which comprises a source of solid lubricant, a heater disposed in thermal contact with the lubricant for heating the lubricant to sublimation and a |
| 5327142 |
Frequency encoding circuit in Bragg cell receiver |
July 5, 1994 |
| The circuit may be used to encode the channel outputs of a Bragg cell receiver, or other type of channelized receiver. Bragg cell receivers use acousto-optic delay lines to analyze signals such as radar pulses present in the Electronic Warfare (EW) environment. These receivers require hi |
| 5327091 |
Electronic mode stirring |
July 5, 1994 |
| A device under test is placed in a metallic reverberation chamber and test are run for various characteristics. An antenna positioned in the chamber radiates microwave energy into the chamber. There is disclosed a method of frequency stirring which uses band limited White Gaussian noise |
| 5327015 |
Superconductor device to produce electrical impulses |
July 5, 1994 |
| An apparatus for producing an electrical impulse comprising a tube made of superconducting material; a source of magnetic flux is mounted about one end of the tube; a means for intercepting the flux is mounted along the tube; and a means for changing the temperature of the superconductor |
| 5326509 |
Fabrication of benzbisazole polymers into monolithic articles |
July 5, 1994 |
| A method for fabricating a monolithic polybenzbisazole article including the steps of:(a) dissolving at least one benzbisazole polymer in a strong acid at an elevated temperature;(b) transferring the resulting solution to a mold;(c) cooling the solution in the mold to a temperature below the |
| 5324997 |
Delayed negative feedback circuit |
June 28, 1994 |
| A modification to the design of high speed logic circuitry will increase the speed of the circuitry. The modification consists of a delayed negative feedback added to the interface between two gates (a driving gate and a driven gate). The feedback is delayed by a time similar to the gate |
| 5323965 |
Hinge end seal |
June 28, 1994 |
| A gap seal for convergent/divergent flap hinge ends to spaced disc and wall surfaces in a 2-D nozzle of a gas turbine engine is provided. The seal employs at least two cups resiliently mounted to the hinge ends, which cups independently translate axially and resiliently to contact the sp |
| 5323103 |
Frequency measurement receiver with means to resolve two folding frequencies of complex signals |
June 21, 1994 |
| This is an arrangement to find two folding frequencies that fold into one frequency bin, which will save hardware. The input frequency in down converted into I and Q channels. Each channel requires one pair (two) of A/D converters. A total of three pairs of A/D converters are required. A |
| 5322591 |
Hydrothermal growth on non-linear optical crystals |
June 21, 1994 |
| The growth of bismuth silicate crystals occurs in a high pressure vessel or autoclave using a hydrothermal growth process. The nutrient material is placed in a sealed container of noble metal, liner, along with a solvent to a selected fill level. A filler fluid is also placed between the |
| 5320866 |
Method of wet coating a ceramic substrate with a liquid suspension of metallic particles and bin |
June 14, 1994 |
| A method for fabricating a liquid conducting porous article having micron sized metallic particles suspended on a ceramic substrate member. The method includes coating the ceramic substrate with a particle slurry on top of which is added an additional amount of the same particles as a dr |
| 5320534 |
Helmet mounted area of interest (HMAoI) for the display for advanced research and training (DART |
June 14, 1994 |
| The Display for Advanced Research and Training (DART), a wrap-around display system for presenting out-the-window visual imagery in a flight simulator, is substantially improved by adding a helmet mounted display of modest field-of-view that displays only an area-of-interest view (HMAoI) |
| 5319322 |
Electron beam antenna microwave generation device |
June 7, 1994 |
| A high energy level arrangement for generating microwave frequency electromagnetic energy from a DC power source by way of a high energy level electron beam coupled into an output waveguide member and serving therein as an antenna source of energy for the waveguide member. The electr |
| 5319190 |
Pocket laser communicator and illuminator |
June 7, 1994 |
| A method of providing near simultaneous night vision and communication including directing a narrow voice modulated IR laser beam at a distant receiver/demodulator during communication periods, causing the IR laser beam to diverge substantially during scene viewing periods, other than th |
| 5319188 |
Collinated light direction sensor system |
June 7, 1994 |
| A system for determining the angles of elevation and azimuth of a source of collimated energy comprises a detector consisting of an annular entrance opening in an opaque structure, and an annular segmented optical detector spaced from and axisymmetric with the opening. Laser, or other co |
| 5318214 |
Activated brazing system for joining titanium aluminide |
June 7, 1994 |
| A method for brazing together two parts at least one of which comprises a titanium aluminide material is described wherein a metallic layer of foil or powder is inserted between the parts in laminar contact with respective confronting surfaces thereof to be joined, the metallic layer com |
| 5317744 |
Method for configuring a computer server to operate with network operating system software to pr |
May 31, 1994 |
| A process that enables a distributed compute network to operate with a network operating system software program. The distributed computer network includes a computer server unit which has output ports and a central processing unit that controls the distributed computer network. The |
| 5317567 |
Multi-speaker conferencing over narrowband channels |
May 31, 1994 |
| A system for digital conferencing over narrowband channels which allows use by multiple simultaneous speakers and which allow for interfacing between vocoders which operate at different bit rates. The system takes advantage of the properties of multi-rate parametric vocoders (which inclu |
| 5316686 |
Perfluoroalkylether tertiary alcohols |
May 31, 1994 |
| Perfluoroalkylether (PFAE) tertiary mono- and poly-alcohols of the general structure: ##STR1## wherein R.sup.1 and R.sup.3 represent perfluoroalkyl groups having from one to fifty carbon atoms or PFAE groups having 2-50 carbon atoms and 1-49 oxygen atoms; R.sup.2 represents a PFP |
| 5315668 |
Offline text recognition without intraword character segmentation based on two-dimensional low f |
May 24, 1994 |
| Image analysis and recognition includes reading text, by digitally scanning a surface, locating the printed material in that digital image, and then recognizing words, phrases, or numbers based on their two dimensional, low frequency Fourier harmonics. One objective is to specifically ap |
| 5315603 |
Backscatter absorption for laser diodes |
May 24, 1994 |
| Whenever any laser is interfaced with any type of optics there is always backscatter back into the laser. For diode lasers this backscatter makes it emit chaotic radiation where the frequency spectrum is broad and contains many different frequencies. This means that the laser has limited |
| 5315513 |
System for modelling moderate resolution atmospheric propagation |
May 24, 1994 |
| MODTRAN is a moderate resolution model and computer code used to predict atmospheric transmittance and background radiance in the microwave, infrared, visible and near ultraviolet spectral regions (0 to 50,000 cm.sup.-1 or 0.2 m to infinity). The code maintains complete compatibility |
| 5315307 |
Doppler frequency angle measurement technique |
May 24, 1994 |
| The technique allows precise angle-of-arrival (AOA) and radio frequency measurements on non-cooperative radar signals, by exploiting precise phase measurement capabilities of frequency measurement receivers. It is assumed that the intercept receivers with this capability are on board an |
| 5314304 |
Abradeable labyrinth stator seal |
May 24, 1994 |
| In a gas turbine engine having a laybrinth seal between an annular rotor and stator therein, in which the stator is surmounted by a honeycomb structure and the rotor has a knife edge which is mounted to rotate in close annular proximity with said honeycomb structure, an improvement is |
| 5313221 |
Self-deployable phased array radar antenna |
May 17, 1994 |
| A phased array monopole antenna has a single layer membrane upon which a plurality of antenna units are attached. Each antenna unit has a flexible curved antenna blade which bends over or springs up when the membrane is rolled or unrolled on a drum. |
| 5312895 |
Benzobisazole copolymer system soluble in aprotic solvents |
May 17, 1994 |
| Para-ordered aromatic heterocyclic polymers having repeating units of the formula: ##STR1## wherein n has a value of 0.05 to 1.00 and Q is a benzobisazole of the formula ##STR2## wherein X is --S-- or --O--, are soluble in aprotic solvents. |
| 5312876 |
Water soluble rigid-rod polymer |
May 17, 1994 |
| Water-soluble rigid-rod aromatic heterocyclic polymers having repeating units of the formula: ##STR1## wherein n has a value of 0.05 to 1.00, M is an alkali metal, Q is a benzobisazole of the formula ##STR2## wherein X is --S-- or --O--, and R is selected from the group consi |
| 5312693 |
Nonsacrificial laser hardening |
May 17, 1994 |
| A nonsacrifical laser hardened structure and method protects against incident high energy irradiation. A very thin outer face sheet with a reflective outer surface is laminated to a foam core which is further laminated to a support structure. The foam core includes liquid and vapor p |
| 5311196 |
Optical system for microwave beamforming using intensity summing |
May 10, 1994 |
| An optically based feed structure is used to distribute appropriately phased signals from a central signal generator to the individual elements of a phased array antenna. Any phase can be generated by adding together four phased signals (phased by 90 degree increments) if the amplitudes |
| 5311018 |
Optical system for obtaining separate and simultaneous near-infrared and visible light images |
May 10, 1994 |
| A camera system for simultaneously recording separate near-infrared and visible light images is disclosed having a visible light source for illuminating a given area with visible white light, indicia generating means for directing an image of a wavelength of light longer than wavelen |
| 5310502 |
High tilt angle FLC mixture for TIR switching devices |
May 10, 1994 |
| The invention provides a series of ferroelectic smectic liquid crystal compounds, FLC, of wide tilt angle and mixtures formulated from them that are useful for high speed modulation or switching of optical radiation. Such FLC mixtures are useful in total internal reflection, TIR switchin |
| 5309636 |
Method for making film cooled sheet metal panel |
May 10, 1994 |
| A method for fabricating a brazed sheet metal panel for use in an engine nozzle structure is described which comprises steps of providing a first sheet metal member having a plurality of spaced dimples formed therein and a second sheet metal member having a plurality of spaced cutouts |
| 5309271 |
Thin film multistable angular optical switch |
May 3, 1994 |
| An intensity sensitive optical switch is described which comprises a nonlinear thin film Kerr material deposited on a conducting surface. |
| 5309029 |
Aircraft power unit with elective mechanical coupling |
May 3, 1994 |
| An integrated aircraft power unit providing the electrical and other forms of energy needed during auxiliary power unit operating conditions-while the aircraft is on the ground, and also providing airborne or emergency power including high altitude flight emergency conditions power where |
| 5308533 |
Aerogel mesh getter |
May 3, 1994 |
| A porous light-weight getter which collects particulate and molecular contaminates that is believed a significant improvement over the prior art is provided in which a metal mesh matrix is coated with a low-density porous aerogel. In the prior art bare metal mesh matrices have been e |
| 5304031 |
Outer air seal for a gas turbine engine |
April 19, 1994 |
| An uncooled turbine outer air is comprised of a combination of monolithic ceramics with high temperature capability and oxidation and creep resistance, and a fiber reinforced ceramic composite with high fracture toughness. In a preferred embodiment of the invention, a fiber reinforced |
| 5303031 |
All optical phase sensitive detector and image demultiplexer |
April 12, 1994 |
| Method of demultiplexing a composite signal light beam includes the steps of directing the composite signal light beam and a reference light beam at a photorefractive material, modulating the reference beam at a frequency about equal to the modulation frequency of a selected signal beam |
| 5302957 |
Passive ranging system |
April 12, 1994 |
| A passive distance measuring system for aircraft landing or other transportation related or other general usage is disclosed. The passive system operates by measuring the time interval between arrival of a precision sweep scanned signal such as a radio frequency signal at two widely |
| 5302881 |
High energy cathode device with elongated operating cycle time |
April 12, 1994 |
| A high energy level electronic device is segregated into source diode and utilization diode portions, portions which may also be identified as cathode and main diode portions, respectively. The cathode diode portion is operated at a low voltage such that closure velocity effects therein |
| 5302760 |
Stability additive for perfluoropolyalkylethers |
April 12, 1994 |
| Stability enhancing additives of the formula: ##STR1## where R.sub.f is a perfluoroalkyl group having 1 to 15 carbon atoms and n has a value of 1 to 6, for perfluoropolyalkylether fluids. These additives are incorporated into perfluoropolyalkylether fluids in an amount ranging fr |
| 5302285 |
Propellant wastewater treatment process |
April 12, 1994 |
| A method for treatment and disposal of propellant wastewaters, soil washwaters or groundwaters having dissolved perchlorate salts is described, which comprises adding to the contaminated water in an anaerobic reactor a mixed bacterial culture containing a specific bacterium, HAP1, wh |
| 5301347 |
Multi-system laser safety shutter controller |
April 5, 1994 |
| The controller is microprocessor based, and provides an interface between laboratory entrances and accompanying safety shutters to block the laser beam during a laboratory breach. The shutter controller comprises a microcomputer operating in a two data bus configuration. Communication to |
| 5301208 |
Transformer bus coupler |
April 5, 1994 |
| A transformer bus coupler, which connects a transceiver to a data bus without impedance discontinuities. The transformer bus coupler maintains the voltage-to-current ratio of signals as they enter and leave the coupler by providing a shunt circuit that attenuates the current of these |
| 5301203 |
Scalable and stable, CW photolytic atomic iodine laser |
April 5, 1994 |
| The scalable and stable, cw photolytically excited atomic iodine laser operates at 1.315 nm. An initial power level of 55 watts/liter was obtained via the cw photolysis of an alkyl-iodide gas like C.sub.3 F.sub.7 I. The greatly enhanced laser performance was achieved using a microwave |
| 5299271 |
System and method of embedding optical fibers in honeycomb panels |
March 29, 1994 |
| For the purpose on monitoring the condition in the interior of a closed metallic honeycomb panel, an optical fiber is embedded therein. An optical connector, secured within a groove has one end exposed to a source of external light, while the optical fibers are connected to the other end |
| 5298298 |
Microscopic tube material |
March 29, 1994 |
| This invention offers a unique method to fabricate unique, straight, curved, or coiled tubes as small as 1 micron (0.000004 inches) in diameter with wall thicknesses starting at less than 0.01 microns. These tubes can be made from many of the materials that can be applied to a surface of |
| 5297327 |
Cryogenic removal method for epoxy impregnated coils from rigid outer housings |
March 29, 1994 |
| A defective focusing coil, impregnated with and held in place with epoxy is removed from its inner lead liner and its outer brass housing by immersing the assembled parts in a bath of liquid nitrogen until the temperature of the assembly is reduced to the temperature of the liquid nitrog |
