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| Number | Title | Issue Date |
| 7027416 | Multi tier wireless communication system A monitoring system is provided with a two tier communication network. Multiple first tier nodes comprising wireless or RF sensors are each equipped with transceivers operating at a first, low power level. Multiple second tier nodes are spaced to communicate with se... | 04/11/2006 |
| 6942959 | Display screen and method of manufacture therefor A screen assembly that combines an angle re-distributing prescreen with a conventional diffusion screen. The prescreen minimizes or eliminates the sensitivity of the screen assembly to projector location. The diffusion screen provides other desirable screen characte... | 09/13/2005 |
| 6522266 | Navigation system, method and software for foot travel A navigation system for mounting on a human. The navigation system includes one or more motion sensors for sensing motion of the human and outputting one or more corresponding motion signals. An inertial processing unit coupled to one or more of motion se... | 02/18/2003 |
| 6428308 | Electronic fuel convertibility selection An apparatus for and method for providing easy and rapid conversion from a first fuel to a second fuel in a gas appliance. The gas appliance has a variable fuel valve controlled by a microprocessor. A table stored in non-volatile memory has an entry for e... | 08/06/2002 |
| 6241530 | Backplane assembly for printed circuit boards The present invention is a backplane for printed circuit board modules. The backplane includes first and second redundant, signal transmission channels. Multiple pairs of substantially identical first and second connectors are mounted on the backplane. Th... | 06/05/2001 |
| 6208414 | Modular laser gyro A modular laser gyro incorporating a laser gyro with a digital control processor. The digital control processor safely and quickly starts the laser gyro. The microprocessor also executes tests on the gyro and provides a health signal. Optional start-up op... | 03/27/2001 |
| 6198295 | Apparatus and method for detecting electrical resistance change in connectors to a remote mounted sensor A control system detects an electrical resistance change in a connector coupling a remote mounted temperature sensor to a control system. A control system determines the resistance of the sensor or the connector by selectively charging or discharging a ca... | 03/06/2001 |
| 6181141 | Failsafe monitoring system for potentiometers and monitor interface A controller, having a microprocessor, a control potentiometer and a monitor interface circuit connected between the microprocessor and the potentiometer, operates to monitor the control potentiometer and monitor interface circuit for failures. The potent... | 01/30/2001 |
| 6164630 | Portable humidifier with water treatment substance dispenser A humidifier including a base defining a reservoir for liquid; a humidification mechanism for inducing dispersion of moisture withdrawn from the reservoir; a liquid storage tank having an outlet communicating with the reservoir and adapted to feed liquid ... | 12/26/2000 |
| 6167193 | Portable electric heater with digital display A portable electrical heater including a portable housing defining an air inlet, an air outlet, and an air flow path therebetween; a blower for circulating air through the air flow path; an electrically powered heater element disposed in the air flow path... | 12/26/2000 |
| 6149141 | Portable evaporative humidifier apparatus A humidifier including a housing defining an air inlet, an air outlet, an air flow path between the inlet and outlet and a liquid reservoir; a blower system for producing air flow between the inlet and the outlet; and a retainer removably mounted in the h... | 11/21/2000 |
| 6149138 | Portable humidifier with keyed replaceable cartridge element A portable humidifier including a housing defining an air inlet, an air outlet, and an air flow path therebetween; a retainer disposed in the housing and defining key structure; and an air permeable, liquid absorbent cartridge element replaceably retained... | 11/21/2000 |
| 6144265 | Calibrated high power radio frequency step attenuator A high power radio frequency(RF) precision step attenuator includes a trim attenuator, a multi-step attenuator and a calibration/control circuit. The control circuit includes a memory for storing attenuator specific calibration data. The calibration data ... | 11/07/2000 |
| 6131889 | Evaporative humidifier with liquid distribution system An evaporative humidifier including a portable housing defining an air inlet, an air outlet, an air flow path between the inlet and the outlet, and a liquid reservoir; a blower system including a fan blade for producing air flow through the path between t... | 10/17/2000 |
| 6133846 | Low cost redundant communications system A communications system capable of providing enhanced data integrity and reliability through redundant buses, and a network interface controller for use therewith. Redundant conductors conforming to well-known ethernet standards interconnect electronics c... | 10/17/2000 |
| 6119949 | Apparatus and method for providing a multiple option select function A control system and method provide a multiple option select function in which an option select resistor acts as a selector. The control system determines the resistance value of the resistor and maps the resistance value to a data entry in an option sele... | 09/19/2000 |
| 6118385 | Methods and apparatus for an improved control parameter value indicator Accurate, unambiguous, and space-efficient electronic display techniques are provided for presenting the operator with an indicator whose graphical configuration varies in accordance with whether the relevant control value is within a predetermined tolera... | 09/12/2000 |
| 6114988 | GPS receiver fault detection method and system A GPS receiver fault detection method for use in a GPS attitude determination system having Q Receivers, wherein Q>3, includes providing R attitude solutions using subsets of P Receivers and signals from two or more space vehicles, wherein 3ࣘPࣘQ-1. Po... | 09/05/2000 |
| 6115261 | Wedge mount for integrated circuit sensors A sensor mount for mounting a sensor to a substrate having a support member, a substrate attachment surface, and a sensor attachment surface. The support member can be attached to the substrate at the substrate attachment surface and the sensor can be att... | 09/05/2000 |
| 6110537 | Coating integrated circuits using thermal spray Protective and security coatings are applied to an integrated circuit by periodically passing the integrated circuit through a flame spray containing molten particles of the coating composition. The integrated circuit is attached to a fixture that is cool... | 08/29/2000 |
| 6106785 | Polymerization process controller A batch polymerization process controller using inferential sensing to determine the integral reaction heat which in turn is used to indicate the degree of polymerization of the reaction mixture batch. The system uses a reaction temperature compared with ... | 08/22/2000 |
| 6108358 | Apparatus for minimizing the effects of laser intensity reduction at cold temperatures in ring laser gyros A circuit for controlling the run current in a ring laser gyro includes circuitry for sensing temperature, supplying a current to the ring laser gyro and controlling the current supplied to the ring laser gyro and the current varies depending on the tempe... | 08/22/2000 |
| 6104875 | Method for field programming an industrial process transmitter A method is disclosed for altering in the field the operating instructions used by an industrial process transmitter to collect, manipulate and transmit output signals representing the state of an industrial process. The method is used with an industrial ... | 08/15/2000 |
| 6101824 | Flexible thermostat controller that permits various control point profiles when controlling multistage HVAC equipment A thermostat for use with multistage Heating, Ventilating and Air Conditioning (HVAC) plants where a proportional/integral control loop is present for each stage of the multistage HVAC plant. Filter constants, Ki and Kp as well as stage control points and... | 08/15/2000 |
| 6098957 | Electro-mechanical torque limiter for valve actuators A valve apparatus used in heating and cooling systems in which a valve housing, a valve element, a drive mechanism, and a torque limiting mechanism operate to open and close the valve element between different ports to allow fluid flow through the flow pa... | 08/08/2000 |
| 6098893 | Comfort control system incorporating weather forecast data and a method for operating such a system In a comfort controls system for multiple buildings (whether residential, commercial or industrial), a weather forecast unit sends weather forecast data over the Internet to a building management provider which handles building management services for a n... | 08/08/2000 |
| 6097031 | Dual bandwith bolometer A dual function pixel of an array, having a large fill factor, for detecting visible light and infrared radiation through the same surface area of the pixel. Infrared radiation is absorbed by a conductive oxide layer. This absorbing layer heats up a heat ... | 08/01/2000 |
| 6094055 | Calibrated high power radio frequency step attenuator A high power radio frequency (RF) precision step attenuator includes a trim attenuator, a multi-step attenuator and a calibration/control circuit. The control circuit includes a memory for storing attenuator specific calibration data. The calibration data... | 07/25/2000 |
| 6085149 | Integrated inertial/VMS navigation solution A system for determining accurate inertial navigation data of a vehicle while moving must compensate for the orientation differences between an upper body and a lower body of the vehicle. These orientation differences are used to increase the accuracy of ... | 07/04/2000 |
| 6079253 | Method and apparatus for measuring selected properties of a fluid of interest using a single heater element A method and apparatus for determining selected fluid properties including thermal conductivity, pressure and/or temperature using a single heater element of the sensor, and in a relatively short period of time. This is accomplished by measuring a variabl... | 06/27/2000 |
| 6078843 | Neural network including input normalization for use in a closed loop control system An apparatus and method for controlling a process using a neural network which operates as part of a closed loop control system. The state of the control system is defined by one or more process condition signals and monitored for a predetermined set of c... | 06/20/2000 |
| 6075910 | Method and apparatus for controlling an electro-optical switch A control arrangement for minimizing optical leakage in a time-division, multi-stage electro-optical switch by the periodic adjustment of switching voltage levels. An optical detector connected to an idle port of the switch transmits a leakage signal whic... | 06/13/2000 |
| 6071316 | Automated validation and verification of computer software A method and apparatus for automating validation and verification of computer software that confirms during a test execution of the software that all lines of code are executed and all branches in the software are taken or not taken at least once. The com... | 06/06/2000 |
| 6070513 | Load transfer device for tandem mounted actuators A load transfer device for use with tandem mounted actuators. The load transfer device includes an actuator coupling assembly and a ground connection assembly. The actuator coupling assembly connects the first actuator to the second actuator and includes ... | 06/06/2000 |
| 6069441 | Method for producing phospher binding materials A phosphor binding material and process is shown and described for LCD backlight systems. The improved process provides a residual phosphor binding material transparent to UV light. No UV light energy is lost to absorption in the binding material and more... | 05/30/2000 |
| 6065346 | Measurement system utilizing a sensor formed on a silicon on insulator structure A measurement system utilizes a sensor formed in a semiconductor on insulator structure that has an offset related to the time that power is applied. A controller applies power, obtains readings and removes power so as to minimize any effect of the offset... | 05/23/2000 |
| 6067160 | Enchancing path length resets in a ring laser gyro In an ring laser gyro, a path length modulation signal is applied to an amplifier with two gain levels and the amplifier's output is added to a path length transducer drive signal that changes the gyro's path length. When a path length reset signal is pro... | 05/23/2000 |
| 6065741 | Pneumatic isolator element A substantially friction free mounting is presented utilizing a plurality of balls which are placed one each in a plurality of grooves between two members that are relatively movable, and a plurality of magnets are placed near the center of each groove to... | 05/23/2000 |
| 6064683 | Bandgap isolated light emitter A light emitting device having a first mirror, an active layer, a second mirror, and a beryllium implantation resulting in a peripheral boundary of a waveguide through the first and second mirrors, the active layer and the trapping layer. A P-N junction i... | 05/16/2000 |
| 6055483 | Systems and methods using bridge models to globally optimize a process facility A control system and a method of operating the same are introduced that globally optimize associated processes within a process facility. The control system includes a global controller, a bridge predictor and many local controllers. The global controller... | 04/25/2000 |
