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Butterfly outflow valve
An outflow valve is disclosed for use in a pressure vessel. The outflow valve includes a dual wall valve housing having a central bore, a butterfly plate...
A turbocharger, having an axial compressor wheel and an axial turbine wheel mounted on a first shaft supported by a housing, and a radial compressor wheel and a...
Airframe mounted motor driven lubrication pump control system and method
A system and method for precisely controlling lubricant supply flow to one or more rotating machines in an aircraft includes a motor, a pump, and a motor control...
Energy based position and speed self-sensing method and apparatus for
An envelope of a voltage may be extracted using an operator to calculate a position and speed of a rotor. A position and speed sensing method may include...
Systems and methods for broadcasting an unknown airport advisory
Systems and methods for advising a flight crew member that an enhanced ground proximity warning system (EGPWS), for example, may continue to provide terrain...
System, apparatus and method for high efficiency low leakage LCD polarizer
An apparatus for a liquid crystal display includes a polarizer film configured to receive light from a liquid crystal display and an optical polarizer screen...
Automatic detection of GPS SA base value for HFOM
An apparatus and method for detecting the type of Selective Availability (SA) engine in a Global Positioning System (GPS) receiver. The apparatus reverse...
Thermal catalytic ignition system for airborne applications
A power source is provided for a resistive heating element that heats a catalyst bed of a reactor that receives a monopropellant fuel and reacts the fuel in the...
Turbocharger having two-stage compressor with boreless first-stage
A turbocharger with a two-stage compressor having first- and second-stage impellers mounted on a common shaft in a back-to-back configuration. The first-stage...
Eye-safe near infra-red imaging illumination method and system
A method and system for eye-safe near infra-red (NIR) optical imaging illumination. An eye of an intended subject are imaged with visible light or NIR light at...
Emergency flight control system
A method and system for preventing the control of an aircraft from the cockpit. In an exemplary embodiment, the system could be triggered externally. For...
Engineered composite quiet check valve
A check valve is provided that includes a valve body, a stop mechanism, and a flapper. The valve body includes a flowpath extending therethrough and a pair of...
Exhaust gas recirculation mixer
The present invention provides an exhaust gas recirculation mixer for use with a long route (i.e., low pressure) EGR system adapted for use in a turbocharged...
Control for variable geometry compressor
An exemplary controller for a variable geometry compressor includes one or more inputs for receiving engine operating information and for receiving a signal...
Multi-piece compressor housing
An exemplary compressor housing includes an axis to coincide with a rotational axis of a compressor wheel housed by the compressor housing, an inlet insert that...
Methods and apparatuses for control of building cooling, heating and power
A control system and method for achieving economic operation of CHP systems. A plurality of factors, including power source prices and operational needs, are...
Building management system
A building management system for one or more buildings, having a processor and a display for showing a model of a building being managed. The model may be shown...
Method and apparatus for identifying physical features in video
An image is processed by a sensed-feature-based classifier to generate a list of objects assigned to classes. The most prominent objects (those objects whose...
Separable transient voltage suppression device
An electronic system comprises a system board and a transient voltage suppression (TVS) device coupled to the system board. The TVS device comprises an...
Light-emitting diode (LED) hysteretic current controller
An LED current control device (100) includes a set of one or more LEDs (10) connected to a current-sensing element (20) and an external voltage source...
Taxiway awareness and advisory system
Methods and apparatus are provided for displaying appropriate identifiers on aircraft taxiways on an aircraft flight deck display. Data representative of taxiway...
Acoustic fire sensing system
The acoustic sound of water flowing to/from activated sprinkler heads is used to identify fire location in a region(s). Acoustic transducers, such as...
Systems and methods for creating MEMS gyros
Methods and systems for creating microelectromechanical system (MEMS) gyros. The methods and systems include generating a map of motor bias and creating MEMS...
Thermostat having modulated and non-modulated provisions
A thermostat providing modulated or analog control of valves or dampers of an air management system. This permits operating a single cooling or heating stage...
Gas turbine engine fuel control system having start / back up check valve
(SBUC) providing a main fuel check...
A fuel control system (10) for a gas turbine engine includes a main fuel inlet line (18), an auxiliary fuel inlet line (20) and an engine fuel outlet line (16)....
Methods of manufacturing a rotor assembly
A method for manufacturing a rotor assembly. The method includes providing a stub shaft having a first part and a second part, providing a magnet between the...
Sounder base housing
Environmental controller housing
Method and apparatus for latent fault memory scrub in memory intensive
A method for operating a memory checker in a command monitoring architecture comprising at least two processing lanes comprises a first step of receiving a...
Apparatus for voltage level temperature compensation
An apparatus is provided for improved temperature compensation of received RF signals. An RF receiver includes receiver circuitry which receives an RF signal and...
Integrated 3-axis field sensor and fabrication methods
A multi-axis magnetic or other field sensing device and method of fabricating a multi-axis magnetic or other field sensing device. An example sensing device is a...
Electrical power distribution system and method with active load control
An electrical power distribution system and a method of implementation are provided. The electrical power distribution system includes: a first AC power source;...
Processes for geometric isomerization of halogenated olefins
Disclosed are processes for the conversion of isomerizable halogenated C2-C6 olefins from one geometric form to a more preferred geometric form. Preferred...
Boron doped shell for MEMS device
A wafer for use in a MEMS device having two doped layers surrounding an undoped layer of silicon is described. By providing two doped layers around an undoped...
Essentially non-flammable low global warming compositions
Mixtures of heptafluorobutene with tetrafluoropropenes provide compositions that have boiling points within an acceptable range, have good chemical stability,...
Bore and shaft assembly
An exemplary system for a turbomachine includes a bore extending from an inner end to an outer end with an inner seat proximate to the inner end and an outer...
Check valve stop assembly and method of retention
A check valve stop assembly and method of retaining the check valve stop assembly in a check valve flow body without external fixation means, wherein the check...
Motion classification methods for personal navigation
A personal navigation system including one or more sensors that sense motion of a human and output signals corresponding to the motion of the human and a...
Dynamic CMG array and method
Methods and apparatus are provided for reorienting control moment gyros (CMGs) to compensate for CMG failure or change in spacecraft (S/C) mass properties or...
Machine architecture for event management in a wireless sensor network
A wireless sensor node comprises a wireless transceiver to communicate over a wireless communication link with at least one other node in a wireless sensor...
Reconfigurable network component layers
A method for configuring an electronics device having reconfigurable network component layers is disclosed. The method selects a first group of pixels from at...
System and method for estimating airborne radar antenna pointing errors
Methods and systems for estimating and correcting airborne radar antenna pointing errors. The methods and systems include predicting expected received power from...
Systems and methods for improving data converters
Systems and methods for improving efficiency of a data converter. An example method generates a noise signal, alters the spectrum of the noise signal based on...
Fast insertion means and method
Methods and apparatus are provided for rapidly moving a filter into and out of an optical beam. A shuttle carries the filter at a first end and first and second...
Level shift circuit with power sequence control
A level shift circuit for providing predictable outputs when VDDH is powering up and minimizing DC current when VDDL is powering up. The level shift circuit may...
Electromechanical actuator including redundant, dissimilar position
A relatively small, lightweight actuator includes a plurality of motors, an actuation element, a translation member, and a plurality of position sensors. The...
Electric drive fuel control system and method
An electric drive fuel control system and method for controlling a total drive torque supplied to a fuel metering pump includes a first main drive motor, a...