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Illumination system with light recycling to enhance brightness
An optical illumination system is comprised of: (a) a light source means having a reflective emitting surface and an intrinsic luminance (brightness), (b) a...
Thermal sensor and method of making same
A two level microbridge infrared thermal detector having an upper detector planar section (a) comprising a temperature responsive detector of an oxide of...
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...
Dissolved wafer fabrication process and associated
microelectromechanical device having a support substrate...
The method of the present invention provides a process for manufacturing MEMS devices having more precisely defined mechanical and/or electromechanical members....
Method of preparing optical fiber for fusion splicing and method of
forming a fusion splice
A method of preparing an optical fiber for fusion splicing comprising the steps of providing an optical fiber having a fiber jacket and an end, removing a...
System and methods for generating and distributing alarm and event
The present invention provides systems and methods for controlling associated processes of a process facility and, in particular, for distributing data among...
Universal current source and current sink interface
An interface circuit for interfacing a data bus with a current sinking sensor or a current sourcing sensor. An input terminal is connected between a cathode of a...
High gain GaN/AlGaN heterojunction phototransistor
A GaN/AlGaN heterojunction bipolar phototransistor having AlGaN contact, i-GaN absorbing, p-GaN base and n-GaN emitter layers formed, in that order, on a UV...
Hybrid duplex bearing assembly having thermal compensation
Disclosed is a bearing assembly with thermal compensation. The bearing assembly includes a bearing mechanism defined by a pair of races and a plurality of...
Method and apparatus for reading a magnetoresistive memory
A method and apparatus for reading a magnetoresistive memory is disclosed wherein the wordline current is turned off during selected sensing operations. This...
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...
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...
Base for a stand fan
Accuracy of an inertial measurement unit
A missile guidance system employs a strap down inertial measurement unit with a separate accelerometer and star sensor that are moved for preflight accelerometer...
Continuous attitude control that avoids CMG array singularities
A system for avoiding singularities in a control moment gyro (CMG) array of a satellite uses closed and open loop control of the CMGs for reorientation of the...
Power supply gamma protection apparatus
A voltage source supplies power to a ring laser gyro and includes a pulse width modulator that charges an output capacitor network. An apparatus connected to the...
Magnetically destiffened viscous fluid damper
Disclosed is a vibration damping and isolation apparatus having a passive damping mechanism. The passive damping mechanism includes a piston and first and second...
CMG control based on angular momentum to control satellite attitude
Control moment gyros in an array are rotated to reorient a satellite. Gyro angle is selected from one of three values based upon whether the stored angular...
Method of making a cut-resistant fiber and fabrics, and the fabric made
A fiber having increased cut resistance is made from a fiber-forming polymer and a hard filler having a Mohs Hardness Value greater than about 3. The filler is...
Multispectral tailorable coatings
A coating comprised of a broadband transparent binder and multilayer thin film particles is applied to the surface of an object. Each particle has a flat...
System and method for sheet measurement and control in papermaking
Significant improvements in papermaking control can be achieved by employing an array of sensors that are positioned underneath the wire of the machine to...
Air plenum filter sealing system
An air duct has a filter mount opening originally intended to accept a shallow filter element for filtering air entering the duct. The opening has an interior...
Optical circuit and methods of manufacturing and stowing an optical
An optical circuit comprising first and second fiber optic components, an optical fiber having a first end coupled with the first fiber optic component and a...
Moisture sensitive element and method of manufacturing the same
A moisture sensitive element in which a functional film is formed in contact with opposing electrodes arranged on a substrate. The element includes a mechanism...
Monolithic bi-directional microvalve with enclosed drive electric field
A monolithic, bi-directional micro device formed on a support base, for example a silicon wafer, including at least one input and output flow channels for flow...
System and methods for globally optimizing 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...
Process for manufacture of thick film hydrogen sensors
A thick film process for producing hydrogen sensors capable of sensing down to a one percent concentration of hydrogen in carrier gasses such as argon, nitrogen,...
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...
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...
Supply current regulator for two-wire sensors
A current regulator is provided for a two wire sensor and comprises first and second conductors arranged to provide a sensor output current, a first resistance...
Method for forming conductive traces and printed circuits made thereby
A method of forming circuit lines on a substrate by applying a roughened conductive metal layer using a copper foil carrier. The copper foil is etched away,...
Sensor packaging having an integral electrode plug member
A chemical sensor apparatus and method of making same is disclosed in which an ion sensitive silicon die is sandwiched between an elastomeric media seal and a...
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...
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...
Flexible interference mounting floating actuator switch assembly
A switch assembly with three axis actuator tolerance comprises a body containing an actuator floating in the x-y plane for moving a camming device which...
A configurable switch having a base and interchangeable stationary contacts positioned in adjustable locations with respect to the base. A plunger is slidably...
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...
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...
Simultaneous two-way communication system using a single communication
A circuit is provided for transmitting and receiving digital signals at a single circuit point simultaneously without significant interference with the output...
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...
Intelligent gap control for improved paper machine profile control
Apparatus and method for controlling the size of a gap through which material is metered. The gap is defined by a rigid surface and a flexible surface connected...
Low cost, high pumping rate electrostatically actuated mesopump
A mesopump having a plurality of elementary cells. The cells each have a body forming a cavity having an electrode on one curved surface and a second surface...
Illumination system having edge-illuminated waveguide and separate
components for extracting and directing light
An illumination system has separate components for extracting and directing light from a waveguide. The system eliminates the need to provide a light directing...
Methods and apparatus for operating an input device in a turbulent
An apparatus and a method are provided for processing a user input that is used to drive cursor movement on a display in a vehicle that is operating in a...
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...
Temperature compensation circuit for a hall effect element
A temperature compensation circuit is provided for use in conjunction with a Hall effect element in which the temperature compensating resistors, or epitaxial...
Flexible thermostat controller that permits various control point
profiles when controlling multistage HVAC...
A thermostat for use with multistage Heating, Ventilating and Air Conditioning (HVAC) plants where a proportional/integral control loop is present for each stage...