| Patent Number |
Title Of Patent |
Date Issued |
| 5365223 |
Fail-safe condition sensing circuit |
November 15, 1994 |
| A circuit for detecting whether the level of an electrical signal having a preselected polarity is above a preselected value, is powered by DC of the opposite polarity. This prevents current leakage within the detector circuit from simulating the level of the electrical signal. Such a ci |
| 5365177 |
Apparatus for measurement of high frequency corona discharges in electrical components |
November 15, 1994 |
| An apparatus for providing a quantitative measurement of high frequency corona discharges from electrical devices operating at high voltages, including an alternating current power source for providing a test signal variable in amplitude and frequency, a high pass filter to reject power |
| 5363875 |
Hydraulic disconnector |
November 15, 1994 |
| A flow disconnector has an intermediate chamber connected between inlet and outlet check valves. A diaphragm controls a venting valve for the intermediate chamber which is designed to empty the intermediate chamber when the difference between inlet pressure and intermediate chamber p |
| 5363700 |
Skewed axis inertial sensor assembly |
November 15, 1994 |
| In the present invention six gyros and six accelerometers are mounted to a support frame generally comprised of a block of a selected material. The relationship of each input axis of each of the gyros and accelerometers is selected to permit all of the sensors to be mounted on the block |
| 5363194 |
Laser gyro microprocessor start up control method and apparatus |
November 8, 1994 |
| A laser gyro start up apparatus and method that safely and quickly starts a laser gyro. A microprocessor sequences the mechanical and electrical systems of the laser gyro such that the gyro is started up quickly in the proper sequence. The microprocessor also executes tests on the gyro a |
| 5363192 |
Mode-locked active gyro solid state lasers |
November 8, 1994 |
| A ring laser gyro that minimizes and avoids the effects of lock-in and backscatter. A ring laser is pumped in a lasing cavity with a mode-locked laser. Dual counterrotating pumped pulses are precisely positioned to avoid overlay in optical elements that contribute to lock-in and back |
| 5363025 |
Actuator employing unidirectional motor for bidirectional rotational positioning |
November 8, 1994 |
| An actuator employing a unidirectional electric motor driving a first rotating member connected to a second rotating member through a pivotable link of which a first end is connected to the first rotating member at a smaller distance from its axis of rotation than the distance between th |
| 5361983 |
Method of maximizing the efficiency of an environmental control system including a programmable |
November 8, 1994 |
| A process which is periodically executed by a programmable thermostat of a heating and cooling system which controls the temperature of a defined space within a structure subjected to a variable external environment. The process advances by an increment of time, .DELTA.t, when the set po |
| 5361212 |
Differential GPS landing assistance system |
November 1, 1994 |
| An aircraft landing system is disclosed in which a differential GPS global positioning system is employed. A ground station, located in the vicinity of one or more landing strips, includes a GPS receiver and a data link transmitter for transmitting GPS correction data and also the global |
| 5361065 |
Windshear guidance system |
November 1, 1994 |
| A windshear guidance system for guiding an aircraft during a microburst windshear is provided. This system includes a time comparison subassembly, an airspeed comparison subassembly and a pitch command subassembly. The pitch command subassembly includes a calibrated air speed source, lat |
| 5360521 |
Method for etching silicon |
November 1, 1994 |
| A method is provided for assuring good electrical contact between a power supply and appropriate regions of silicon wafers to assure proper etching during the micromachining of the silicon die locations on the wafer. A plurality of conductors are disposed in the interstices between rows |
| 5360335 |
Fuel burner control system with selectable standing pilot mode |
November 1, 1994 |
| A burner control system with an interrupted or intermittent type of pilot burner has a special feature allowing transitions between a pilot flame hold state where the pilot flame only burns and the run state where the main burner is operating. Each transition to the pilot flame hold stat |
| 5360236 |
Apparatus and methods for mounting an inertial sensor chassis to an aircraft support frame |
November 1, 1994 |
| An inertial sensor chassis is disclosed. The system includes a support frame including three alignment pins and two planar mounting surfaces. The chassis includes three mating bushing and mating planar surfaces held against the support frame planar mounting surfaces by means of bolts |
| 5359890 |
Integrated electronic primary flight display |
November 1, 1994 |
| One side of a primary flight display has an elongated vertically disposed airspeed dial display which provides global or macro airspeed information. A rolling drum display provides a digital display of a present value of airspeed. An elongated vertically disposed altitude dial display is |
| 5358005 |
Solenoid valve with dirt trap |
October 25, 1994 |
| A solenoid valve in which an actuator is located above a valve seat and closure member. A valve stem which carries the closure member has a particle diverting collar thereon located above a valve stem guide in the valve housing. The valve housing has an annular, upwardly opening well |
| 5356233 |
Mechanical-electrical safety locking system |
October 18, 1994 |
| The present invention relates to electronic chassis installed on aircraft. More particularly, the present invention relates to a safety locking system for establishing the presence of the mechanical-electrical integrity of a chassis. More specifically, disclosed is a safety locking s |
| 5355422 |
Broadband optical modulator |
October 11, 1994 |
| A broadband optical modulator having a light waveguide and modulating electrodes incorporated into an output or drain transmission line of a distributed amplifier driver. The modulator has a distributed gain mechanism which overcomes the electrical losses in the modulating electrodes |
| 5355031 |
Complementary logic with n-channel output transistors |
October 11, 1994 |
| A gate having a complementary input stage (12) and an N-channel push-pull output stage (14). This circuit is faster than a circuit with a single complementary stage because the N-channel transistors can pull-up or pull down the load capacitance more quickly than P-channel transistors can |
| 5353142 |
Electro static discharge protection for processing active matrix liquid crystal displays |
October 4, 1994 |
| An improved method for providing extended electro static discharge protection of an active matrix liquid crystal display, at the external lead contact areas by using a shorting conductor or bar to short out all row and column contacts or leads on the display, and to protect the elect |
| 5353003 |
Force sensor |
October 4, 1994 |
| A force sensor is provided which incorporates a pressure transducer disposed within a housing structure. A force transmitting means, such as a shaft slidable within an opening, is provided to communicate force from an external source to a diaphragm of a pressure sensor. An elastomeric |
| 5352930 |
System powered power supply using dual transformer HVAC systems |
October 4, 1994 |
| A power supply to supply power to a secondary system. The power supply is adapted to receive power from a plurality of primary systems. The power supply having a first rectifier which supplies power to the secondary system from a first primary system. At least one isolated rectifier whic |
| 5352061 |
Anti-rotation ring joint |
October 4, 1994 |
| A ring joint for a space vehicle subject to vibration forces during launch having anti-rotation key means to avoid relative angular displacement of parts on each side of the ring joint gap. The ring joint includes top and bottom flanges, each flange having an axial bearing surface and a |
| 5351855 |
Humidistat reset control |
October 4, 1994 |
| An environmental control system that utilizes the output of a thermostat to estimate the outdoor temperature can be used to eliminate the possibility of condensation on the inside of windows and on the inside of the walls. This is important in homes and buildings that are located in area |
| 5351550 |
Pressure sensor adapted for use with a component carrier |
October 4, 1994 |
| A pressure transducer is provided with a housing member that attaches to a rigid and generally planar member, such as a ceramic circuit board. The legs of the housing member can pass through holes in the circuit board or, alternatively, can attach to edges thereof. The legs of the housin |
| 5351184 |
Method of multivariable predictive control utilizing range control |
September 27, 1994 |
| A process control system which includes at least one manipulated variable and at least one controlled variable, provides a method for robust control of a process. Predetermined constraints of the manipulated variables and the controlled variables, and the present values of the manipulate |
| 5351124 |
Birefringent component axis alignment detector |
September 27, 1994 |
| An axis alignment detector for aligning axes of two birefringent components or fibers at forty-five degrees relative to each other. Polarized light is put into one axis of one of the two components or fibers to be aligned. The light goes from the one fiber through a junction where the tw |
| 5351028 |
Magnetoresistive proximity sensor |
September 27, 1994 |
| A proximity sensor which has planar magnetoresistive elements lying in the plane of a radial magnetic field. The magnetoresistive elements arranged in a bridge configuration and are magnetically saturated by the radial magnetic field. The proximity sensor detects the approach of a fe |
| 5351009 |
Method for calibrating components permitting the use of low cost components |
September 27, 1994 |
| Low cost components of a circuit board are calibrated in a test fixture to the same accuracy as a single high precision resistor, thereby eliminating the need for high precision, high cost components. The current through the resistor on the circuit board under test is ascertained by dete |
| 5351005 |
Resetting closed-loop magnetoresistive magnetic sensor |
September 27, 1994 |
| A switched-magnetization closed-loop magnetometer having a magnetoresistive bridge for sensing external magnetic fields. The output signal from the bridge to an amplifier, is magnetically nulled by a feedback coil. Each of the bridge elements have a magnetic easy axis that is periodicall |
| 5349441 |
Fiber optic gyroscope refractive index induced error compensation |
September 20, 1994 |
| An error compensator for a resonator fiber optic gyroscope extracting characteristics from the output signal of a photodetector, receiving electromagnetic waves from the resonator, and combining them to result in a determination of substantially the rotation rate error that is due to |
| 5349302 |
Sense amplifier input stage for single array memory |
September 20, 1994 |
| Sense amplifier input stage for reading the output of a single array memory having an "unknown" output, a reference "one" output and a reference "zero" output. A first differential amplifier compares the "unknown" output to the reference "one" output, and a second differential amplifier |
| 5348563 |
Air purifying apparatus |
September 20, 1994 |
| A ceiling mounted air purifier that provides a high velocity, multi-directional air exhaust pattern that distributes filtered air to all areas of a room which includes a plurality of filters and centrifugal fans. The centrifugal fans are substantially surrounded by baffles which form |
| 5347361 |
Rotation sensor output signal processor |
September 13, 1994 |
| Angular motion sensor signals from an inertial integrating rate sensor are provided to a translation device that provides a translated output signal that is substantially the same as an input sensor signal translated in frequency by an amount equal to a reference frequency. The translate |
| 5347289 |
Method and device for measuring the position and orientation of objects in the presence of inter |
September 13, 1994 |
| A method of measuring the position and orientation of an object is disclosed in conjunction with an apparatus to achieve this method. The method and apparatus reduce the metal effects caused by metal objects which are in close proximity to a magnetic field generator. The metal effect |
| 5347236 |
Modulator for negative pulse activated oscillators |
September 13, 1994 |
| A modulator for providing modulating voltages across the anode and cathode of a negatively pulsed magnetron includes a switch which, when activated, couples the modulating voltage source to the cathode terminal, a current regulator which maintains a constant current flow through the anod |
| 5347204 |
Position dependent rate dampening in any active hand controller |
September 13, 1994 |
| A control system for an active hand controller, for example, uses a control stick connected to and controlled by a motor. Electronics are provided to control the motor to eliminate oscillations due to motor torque and high gain due to breakout at the control stick when the control stick |
| 5346129 |
Indoor climate controller system adjusting both dry-bulb temperature and wet-bulb or dew point t |
September 13, 1994 |
| A controller for a climate control system has a humidity (wet-bulb or dew point) temperature sensor as well as a dry-bulb temperature sensor within the enclosure. The humidity temperature value is used in connection with the dry-bulb temperature to generate a single error signal which is |
| 5346128 |
Humidity control system |
September 13, 1994 |
| A humidity control system for a space receiving conditioned air from a duct has sensors which measure the current humidity in both the space and the duct. The system calculates a duct set point based on the difference between the current space humidity and the humidity set point for the |
| 5345963 |
Modulating pressure regulator with shape memory alloy actuator |
September 13, 1994 |
| An electrically controlled modulating pressure regulator in which a main valve regulates fluid flow between an inlet and an outlet in response to a control pressure produced by a servo valve which is responsive to the outlet pressure and the force applied by a regulator spring to a diaph |
| 5344524 |
SOI substrate fabrication |
September 6, 1994 |
| A back-etch silicon-on-insulator SOI process that has a silicon handle wafer with an oxide layer bonded at room temperature to a silicon device wafer with an etch stop and silicon device layer. The surfaces that are bonded at room temperature are first conditioned to be hydrophilic. Afte |
| 5343474 |
Slotted arbitration without time jitter in a table driven protocol |
August 30, 1994 |
| A media access protocol provides a fixed frame length and limited arbitration among certain predetermined users by providing limited arbitration during certain fixed time slots of a table driven proportional access system. For the remaining fixed time slots, only one user per fixed t |
| 5341209 |
Triangular dither drive apparatus for a ring laser gyroscope |
August 23, 1994 |
| Control apparatus for an RLG dither motor includes a digital phase shifter for providing a clock signal related to the RLG position signal. A rate pulse generator for receiving an amplitude word signal generated by a processor at intervals determined by the clock signal and providing a |
| 5341097 |
Asymmetrical magnetic position detector |
August 23, 1994 |
| A gear tooth sensor is provided which incorporates a magnet and two magnetically sensitive devices, such as Hall effect elements. The two magnetically sensitive devices are disposed in a common plane with each other with one of the devices being located at a position closer to the ma |
| 5340019 |
Electronic aquastat in immersible capsule |
August 23, 1994 |
| A liquid immersible electronic aquastat in which a temperature responsive element and substantially all associated electronic circuitry are arranged on a circuit board within a tubular capsule of liquid impervious material closed at one end and having a external diameter not exceeding 3/ |
| 5339237 |
Method for interlock tracing for discrete devices in a process control system |
August 16, 1994 |
| When an interlock trip condition occurs, a back tracing of interlock logic occurs by examining input signals to an output gate of the interlock logic to determine which input signal caused the interlock trip condition. If the input signal is a predetermined interlock condition, that sign |
| 5339092 |
Beam former for matrix display |
August 16, 1994 |
| A graphics system having a beamformer operating on image data and sub-pixel or fractional address data coming from a modified image memory and graphics processor producing correctly anti-aliased data to be shown on raster displays and in particular on color mosaic active matrix displays. |
| 5339055 |
Serrodyne phase modulator having ramp generated by combining two oscillator signals |
August 16, 1994 |
| A frequency phase modulator which generates a phase modulator controlled slope voltage waveform. The controlled slope voltage waveform is controlled by coupling a first fixed frequency oscillator with a second variable frequency voltage controlled oscillator. The period of the ramp w |
| 5337982 |
Apparatus and method for controlling the vertical profile of an aircraft |
August 16, 1994 |
| In an aircraft, there is included a Flight Management System (FMS), Autopilot and Autothrottle for controlling the aircraft. The apparatus has a plurality of outputs for definition of the real-time targets, controlled by the Autopilot and Autothrottle, to guide the vertical position of t |
| 5337787 |
Circumferential sealing apparatus |
August 16, 1994 |
| A cylindrical seal arrangement is provided by alternatively disposing a plurality of O-ring seals and cages in a generally cylindrical arrangement. The O-ring seals are generally annular in shape and, in cross section, comprise an inner portion, an outer portion and an connector port |
| 5337141 |
Method and apparatus for distortion free measurements |
August 9, 1994 |
| The present invention provides a method and apparatus for removing systematic distortion from measurements of an observable parameter. The method and apparatus of the present invention is particularly useful for removing systematic distortion in phase angle measurements of ring laser |
