| Patent Number |
Title Of Patent |
Date Issued |
| 5274334 |
Calibrated physical parameter value measurement system |
December 28, 1993 |
| A circuit for measuring a parameter value by measuring the time required to charge a capacitor in a sensor RC circuit from a first to a second voltage includes a reference RC circuit whose capacitor is also charged between two voltage levels. The circuit is calibrated so that the time in |
| 5272650 |
Self correcting time base for inaccurate oscillators |
December 21, 1993 |
| An apparatus and method for providing a microprocessor having an inaccurate oscillator with a desired time base. The cycles of the output signal of the oscillator are counted by a first counter until the counted number equals a predetermined correction count. The first counter then produ |
| 5272639 |
Terrain referenced navigation electromagnetic-gravitational correlation |
December 21, 1993 |
| A terrain reference navigation system for an aircraft, surface vessel or subsurface vessel utilizing three sets of geo-physical correlation data. A kalman filter is used to correlate terrain data, electromagnetic data and gravimetric data with the output of a digital map of terrain, |
| 5271027 |
Gas discharge device current control circuit |
December 14, 1993 |
| A low voltage comparator circuit is utilized for comparing the current flowing into and out of one of the electrodes of a gas discharge device with a preselected value. The comparator provides an output signal to an optical isolation means for generating light waves in response to the |
| 5270952 |
Self-adjusting recovery algorithm for a microprocessor-controlled setback thermostat |
December 14, 1993 |
| A recovery algorithm for a setback thermostat uses the intersection of the space temperature with a sloped recovery temperature line which approximates the change in temperature as a function of time during recovery of the temperature controlled space from a setback temperature, to d |
| 5270854 |
Narrow band selective absorption filter |
December 14, 1993 |
| A solid state form of a dye-solution absorption filter is disclosed. Physical vapor depositable (i.e., evaporable) dyes are codeposited with a polyester matrix in a vacuum system to randomly disperse dye molecules in a solid dilutant. The dyes are selected to absorb at the wavelengths of |
| 5269440 |
Vibratory bowl feeder with automatic clean out function |
December 14, 1993 |
| A vibratory bowl feeder is provided with an automatic cleanout feature which comprises an opening formed in the bottom surface of a vibratory bowl proximate a ramp formed on that bottom surface. The ramp extends a predetermined angular distance around the bottom surface of the bowl and |
| 5268810 |
Electrical connector incorporating EMI filter |
December 7, 1993 |
| An electrical connector receptacle for allowing connection of electronic apparatus contained within a shielded enclosure to a multi-conductor wiring harness using a plug having a plurality of male pins arranged in a grid pattern is shown in which the connector receptacle includes a c |
| 5264853 |
Method of reducing false tracks due to suppression pulse replies in an aircraft tracking system |
November 23, 1993 |
| In an aircraft which has a tracking system, the aircraft interrogates all target aircraft in the vicinity of the aircraft in order to determine potentially dangerous situations. The interrogation has a predetermined interrogation sequence which includes interrogation pulses and suppressi |
| 5264848 |
Data compression/decompression with aliasing error reduction |
November 23, 1993 |
| A data compression/decompression method incorporating aliasing error reduction. An array of terrain data is first scanned for a set of modes and indexes are assigned to those modes. These modes are used as precision points for compression and decompression. A compressed index database is |
| 5264838 |
Apparatus for generating an anti-aliased display image halo |
November 23, 1993 |
| Apparatus and method are disclosed for providing a halo (background region) around selected image data in an anti-aliased image processing system. The anti-aliased image processing system applies a distribution function to an image (impulse) point so that the impulse point contributes to |
| 5264768 |
Active hand controller feedback loop |
November 23, 1993 |
| An active hand controller system is provided wherein a feedback loop detects the position of a control stick to control a motor driving the control stick to thereby provide certain force feel characteristics to the control stick. The feedback loop includes a detector for detecting force |
| 5264715 |
Emitting with structures located at positions which prevent certain disadvantageous modes and en |
November 23, 1993 |
| A light emitting device is provided with mirrors placed on opposite sides of the source of light and spaced apart by a distance that is determined as a function of the wavelength of the light emitted by the light source. One particular embodiment of the present invention spaces the mirro |
| 5263271 |
Annumciator with improved deadfront effect and improve light distribution uniformity |
November 23, 1993 |
| An annunciator apparatus has a light directing device that efficiently causes light to pass from a light source, such as a lamp, toward a generally flat surface of the light directing device in an efficient manner. The light pipe of the annunciator incorporates parabolic rear surface |
| 5263198 |
Resonant loop resistive FET mixer |
November 16, 1993 |
| A mixer includes a local oscillator (LO) matching network having an LO input port, an RF matching network also having an input port and an IF filter which provides an IF output from the mixer. A FET having a gate, drain and source operates at the center of the mixer. A resonant loop is |
| 5262752 |
Electrical switch having a two stage snap action interface for enhanced operation |
November 16, 1993 |
| An electrical switch assembly includes a snap action switch which is actuated from one to another conduction state by a snap action interface mechanism moved by an external actuation element between first and second corresponding positions. The snap action interface mechanism prevents th |
| 5262641 |
Compensation mechanism for a pressure sensor having counterweight mechanism |
November 16, 1993 |
| A differential pressure sensor with a compensation means, said differential pressure sensor comprising the diaphragm with a first means having a mass mounted upon the diaphragm. The first means is utilized to determine the position of the diaphragm relative to an initial first position a |
| 5262615 |
Film resistor made by laser trimming |
November 16, 1993 |
| A trimmable resistor is provided which can be trimmed with a single movement of a laser beam without requiring intermitted deenergizations of the beam accompanied by measurements of the resistance to determine additional material removal steps. The procedure of the present invention |
| 5262607 |
Pushbutton switch with safety stop |
November 16, 1993 |
| A pushbutton switch is provided with a safety mechanism that permits the button and plunger to be depressed following a relamping procedure in order to reset the mechanism without actuating the switch. When the plunger is pulled upward to initiate the relamping procedure, a cam follo |
| 5261092 |
Synchronizing slave processors through eavesdrop by one on periodic sync-verify messages directe |
November 9, 1993 |
| Data bases of a first and second input output processor (IOP), which are primary and secondary slave IOPs, respectively, are synchronized, and communications by a master controller is made only to the first IOP. Each IOP is executing the same tasks utilizing their own clocking systems. A |
| 5260225 |
Integrated infrared sensitive bolometers |
November 9, 1993 |
| A method for fabricating an integrated infrared sensitive bolometer having a polycrystalline element whereby an oxide region deposited on silicon nitride covered with a first polysilicon layer which is etched to provide a location for a bolometer element. A second polysilicon layer is |
| 5258323 |
Single crystal silicon on quartz |
November 2, 1993 |
| A method for fabricating single crystal islands on a high temperature substrate, thereby allowing for the use of high temperature processes to further make devices incorporating the islands such as, for example, high mobility thin film transistor integrated drivers for active matrix |
| 5257547 |
Amplified pressure transducer |
November 2, 1993 |
| A pressure transducer is provided which incorporates numerous stress reducing characteristics. A pressure sensor is mounted to a ceramic plate with a buffer plate there between to isolate the pressure sensor from stresses that could be transmitted through the ceramic plate. The ceramic |
| 5255975 |
Low cost calibration system for frequency varying temperature sensing means for a thermostat |
October 26, 1993 |
| Low cost temperature sensor for thermostats utilizing a calibration resistor and a microprocessor with switchable ports wherein said microprocessor selects between high impedance input or an output for a temperature sensing element and a calibration resistor where by selecting the in |
| 5255388 |
Synchronizing slave processors through eavesdrop by one on a write request message directed to a |
October 19, 1993 |
| Data bases of a first and second input output processor (IOP), which are primary and secondary slave IOPs, respectively, are synchronized, and communications by a master controller is made only to the first IOP. Each IOP is executing the same tasks utilizing their own clocking systems. A |
| 5255159 |
Circuit board spacer |
October 19, 1993 |
| A solder spacer device and method for use in positioning a grid pin array having a plurality of pins over a circuit board having a plurality of pin holes respectively receiving the pins. The spacer is pulled through a central opening in the circuit board after the pins are soldered in th |
| 5253963 |
Snap together wedgelock |
October 19, 1993 |
| An improved wedgelock assembly for retaining printed wiring boards in a device. The snap-together wedgelock assembly is made up of a screw assembly and a main wedge. The main wedge having fingers for retaining the screw assembly in place. |
| 5252907 |
Circuit arrangement for mitigating power switch capacitance |
October 12, 1993 |
| A circuit arrangement is provided to mitigate the parasitic capacitance that typically is associated with solid state switches which are designed to carry high current magnitudes. By disposing a capacitive component in series with a power switch which, in turn, is connected in series wit |
| 5252826 |
Differential pressure utilizing opto-reflective sensor |
October 12, 1993 |
| A differential pressure sensor utilizing an opto-reflective sensor comprising a diaphragm with a top and a bottom, the diaphragm having an optical reflector mounted upon it. The diaphragm is mounted in a housing, wherein the housing has a first inlet port and a second inlet port, the |
| 5251230 |
Resonant cavity dither with index of refraction modulator |
October 5, 1993 |
| A laser gyro having a laser source for providing laser energy includes a laser gain device for receiving lasing energy and generating first and second counterpropagating laser pulses along a common optical path. A detector detects at least one of the pulses and generates an index of |
| 5250947 |
Altitude tape for aircraft displays |
October 5, 1993 |
| A moving altitude tape for a flight instrument display adapted to provide intuitive visual cues for determining deviation from a desired altitude. A window incorporates a digital altitude readout and a pointer index which is aligned with calibration marks on the altitude tape. In use the |
| 5249783 |
Vibration absorbing damper |
October 5, 1993 |
| A vibration absorbing damper of the viscous type having an outer cylinder enclosing a damping member with the damping member positioned for axial movement within the outer cylinder while retaining a hermetic seal without the use of gaskets or seals. The damping member is comprised of a p |
| 5249739 |
Apparatus and method for monitoring the operating condition of a burner system |
October 5, 1993 |
| Apparatus and method for sensing the operating condition of a burner temperature as the indicating variable. When the operating status is stable, the flue temperature should be nearly identical to that when the system was known to be in proper condition. During a time when the system |
| 5249462 |
Safe channel design for flow sensor chip microbridges |
October 5, 1993 |
| The necked down transitional nozzle or channel leading to the measurement channel of a compact microanemometer gas meter having an open sensor is modified by introducing a flattened sector opposite the mounted sensor to eliminate particulate matter from being scattered in the direction o |
| 5249031 |
Ring laser gyro dither stripper |
September 28, 1993 |
| A dither stripper for laser gyro dither including a digital microcomputer which controls the stripping of the dither signal from the inertial navigation signal of the laser gyro. The dither stripper schedules internal A/D conversions using an A/D conversion arbitration scheme as well |
| 5248269 |
Cup terminal |
September 28, 1993 |
| An electric terminal for making an electrical connection to a threaded member includes a flat base having an opening for the threaded member, a generally cylindrical wall portion extending from the perimeter of the base, and holes for receiving and retaining a conductor. |
| 5248083 |
Adaptive furnace control using analog temperature sensing |
September 28, 1993 |
| An adaptive furnace controller utilizing analog temperature sensing to maintain a constant preselected temperature in the heat exchanger during operation. The adaptive furnace control measuring heat exchanger temperature and regulating a controllable valve to adjust burner firing rat |
| 5247278 |
Magnetic field sensing device |
September 21, 1993 |
| A self-contained magnetic field sensing device which has magnetic field sensing elements arranged in an electrical bridge network. An integral electrical conductor spaced from the sensing elements carries a current for setting and resetting the direction of magnetization of the sensing |
| 5245635 |
Clock recovery circuit for Manchester encoded data |
September 14, 1993 |
| An input data stream (a manchester encoded data stream which includes a clock signal component and has some jitter) is inputted to a clock extractor for extracting the clock signal component, the clock signal component having missing clock pulses. A delay line oscillator provides the |
| 5245400 |
Fiber optic polarization maintaining fused coupler fabricating apparatus |
September 14, 1993 |
| A fiber optic polarization maintaining apparatus for use in fabrication of fused optical couplers, where the fused optical couplers include first and second optical fibers which each have a principle axis. A light launching source is coupled through a lens into a first end of a selected |
| 5245343 |
Enhanced accuracy delta-sigma A/D converter |
September 14, 1993 |
| A delta-sigma modulator is provided with a multi-stage shift register coupled to receive as its input the output from a quantizer including an analog integrator. The serial digital output signal train from the shift register is fed back to the input of the integrator and because of the |
| 5244819 |
Method to getter contamination in semiconductor devices |
September 14, 1993 |
| A frontside gettering method for removing metallic contamination from a thin film SOI or SOS silicon device. Damage sites are created by ion implantation into inactive regions of a silicon substrate. An annealing step causes metallic contamination to diffuse from the active device re |
| 5244537 |
Fabrication of an electronic microvalve apparatus |
September 14, 1993 |
| An electronic microvalve design and fabrication process for a miniature gas valve. In this microvalve design an objective is to minimize the operating voltage of the valve and minimize the force necessary to close the valve and hold it tightly closed against high gas pressures. The micro |
| 5243873 |
Two-axis motion mechanism |
September 14, 1993 |
| A two-axis motion mechanism with reduced backlash includes two-axis motion that is transferred between a moveable member and a first and second shaft positioned orthogonal to each other through three principle bearings. The first and second shaft are fixedly positioned so as to constrain |
| 5243544 |
Microgravity accelerometer data acquisition system |
September 7, 1993 |
| Accelerometer apparatus for a space vehicle includes sensors for sensing accelerations on board the vehicle which provide accelerometer input signals. Interface circuits are coupled to receive the accelerometer input signals and attenuate DC bias and remove alias frequencies from the |
| 5240583 |
Apparatus to deposit multilayer films |
August 31, 1993 |
| The present invention discloses an apparatus to deposit thin films on a substrate. An ion beam produced by an ion gun, which is radio-frequency excited, impinges upon a target. The target is translatable laterally by a target holder to bring different target materials into contact with t |
| 5238184 |
Thermostat having simple battery level detection |
August 24, 1993 |
| A thermostat having a simple battery level detection circuit. The output of an oscillator, having a frequency dependent upon the battery level, is compared to the output of a battery level independent time base. If the two outputs are not in a predetermined relationship, all connected HV |
| 5237523 |
Flowmeter fluid composition and temperature correction |
August 17, 1993 |
| A method for correcting the flow measurement of a gaseous or liquid fluid of interest for changes in the composition and temperature of that fluid in a flowmeter of the hot element type is disclosed in which an uncorrected flow value signal for the fluid of interest in relation to a |
| 5237437 |
Apparatus and method for a high contrast, wide angle, color, flat panel, liquid crystal display |
August 17, 1993 |
| In order to provide a high contrast, wide angle, color, liquid crystal display, the pixel elements each have subpixel color cells fabricated with a thickness of liquid crystal material through which light perpendicular to the display panel is transmitted that is less than the liquid crys |
| 5237387 |
Dual serrodyne resonator fiber optic gyroscope |
August 17, 1993 |
| A dual serrodyne resonator fiber optic gyroscope utilizing two positive-going or two negative-going ramp signals having a frequency difference, to track resonance frequencies of laser light traveling in two directions in a fiber optic resonator. The difference in the servo-controlled |
