At Patents you can conduct a Patent Search, File a Patent Application, find a Patent Attorney, or search available technology through our Patent Exchange. Patents are available using simple keyword or date criteria. If you are looking to hire a patent attorney, you've come to the right place. Protect your idea and hire a patent lawyer.
Method and means for programming a programmable electronic thermostat
A programmable electronic thermostat which utilizes time and temperature pairs. This thermostat utilizes a first display which displays the current status...
Dual matching current sink total temperature circuit
The disclosure relates to a calibration-free analog processing circuit for use with an outside total temperature probe and an air data computer. Dual matching...
Light emitting diode with improved behavior between its substrate and
A group III-V substrate is doped with tellurium or another group VI element, instead of silicon, in order to avoid the conductivity type conversion that could...
Capacitive pressure sensor isolating electrodes from external environment
A capacitive pressure sensor is provided which is capable of highly accurately and reliably measuring pressure over a wide range from an extremely low level to a...
On-site calibration device and method for nonlinearity correction for
A method and apparatus for providing calibrated and linearized flow sensors for VAV systems with the sensor corrected for device/electronic/drift/and field air...
Fiber-optic coupler package
A housing for fiber optic components reduces stress on optical fibers and protects the components from environmental shock and vibration. The housing includes a...
Pattern recognition apparatus and method using fuzzy logic
Pattern recognition method and apparatus are provided which can recognize not only standard typewritten characters but also handwritten characters and various...
Readout system for dilatometers
A method and apparatus for calculating the area of an image, including the steps of selecting an image and determining a first radial line segment from the...
Automatic calibration of redundant sensors
A system for calibrating the sensors of a redundant sensor system by calculating a first set of error signals based on differences between a combination of the...
Low cost radar altimeter with accuracy enhancement
A low cost frequency modulated (FM) radar altimeter system with enhanced accuracy for continuously providing an altitude of a target, comprising a transmitter...
Electromagnetic pulse coupling network
A coupling network for electromagnetic pulsed testing arrangements includes three stacks of toroidal ferrite cores. Two of the stacks are of identical diameter,...
Sensor with magnetoresistors disposed on a plane which is parallel to
and displaced from the magnetic axis of a...
A proximity sensor has two magnetoresistive elements in a common plane and displaced from a lateral surface of a permanent magnet. The common sensing plane of...
Portable room air purifier with horizontal grid one-piece cover and
Portable room air purifier with flush vertical grid one-piece cover and
Optical fiber sensor coil using reverse quadrupoles and method of
In a optical fiber coil arrangement for use in rotation sensors, for example, errors resulting from axial and/or radial time varying temperature gradients can be...
Spatial filter for improving polarization extinction ratio in a proton
exchange wave guide device
A proton exchange polarizer with a spatial filter positioned to reduce cross coupling of unguided radiation. A photoconductor substrate is fabricated from...
Integrated laser power monitor
A vertical cavity surface emitting laser source having an integrated power monitor at the non-emitting end of the source.
Apparatus for monitoring ion beams with an electrically isolated aperture
An apparatus for monitoring ion beams with an electrically isolated aperture includes an ion beam source for generating an ion beam and an electrically...
Reaction wheel and method of safing wheel
An improved reaction wheel assembly and method is provided whereby a reaction wheel assembly contains a safing mechanism for securing the assembly. A rotor shaft...
Fuse for a projectile
A programmable fuse for a projectile is supplied with voltage during the programming phase by rectifying the inductively transmitted program information. The...
Heating and cooling thermostat housing
Moment cell counterbalance for active hand controller
An active hand controller system includes a moment cell for generating a signal representative of the force or torque applied to the stick of the hand controller...
Interlock mechanism for a key operated door switch
A key operated door interlock switch is provided with a cam structure having a first cam and a second cam connected together for rotation about a first axis. A...
Flame rectification sensor employing pulsed excitation
A flame rectification type flame sensor circuit and method in which a generator injects periodic pulses of alternating voltage into a flame region, the voltage...
Method of construction of hierarchically organized procedural node
information structure including a method for...
A knowledge acquisition tool for direct use by an expert in the automatic creation of a knowledge base derived from the knowledge of the expert, the knowledge...
Magnetic means for suppression of lasing in certain wavelengths in a
ring laser gyro
A magnetic device attached to a ring laser gyro is used to prevent undesirable operating conditions in a ring laser gyro. Undesirable operating conditions occur...
Polysilicon pixel electrode
A liquid crystal display wherein each pixel has a thin film transistor with a silicon pixel electrode. A doping and recrystallization of the silicon is effected...
Photoelectric conversion method and apparatus thereof
In the photoelectric conversion method and apparatus applicable to displacement sensors irradiating light to objects and sensing the distances to the objects,...
Fiber optic gyroscope output noise reducer
A noise reducer for reducing the results in the system output signal of optical noise introduced into an optical subsystem therein, having a phase modulator, by...
Sensor actuator bus system
A four-wire bus is provided with a two-wire power bus and a two-wire signal bus and a plurality of sensors and actuators attached to both two-wire busses. A...
Engine shaft with integrally formed complementary targets
A dual complementary target arrangement is provided which enables the targets to be formed as an integral part of a cam shaft. By machining first and second...
Position sensor with two magnetically sensitive devices and two target
tracks which are sensed in combination...
A position sensor is provided with two target tracks which each comprise a plurality of magnetic and nonmagnetic segments. Each target track is associated with a...
Night vision compatible color correction system
An apparatus for achieving an active matrix liquid crystal display flat panel that optically eliminates bluish or purplish background luminance and fluorescence...
Thermostat with adjustment for the cycling rate of the heating plant
An electromechanical thermostat has a fixed value voltage anticipator resistor and a variable anticipator resistor for series connection with the load. This...
Digital to analog interface conversion circuit
An interface circuit is provided to allow substitution of digital output rotation sensors such as fiber optic gyroscopes or ring laser gyroscopes in place of...
Comb toothed field emitter structure having resistive and capacitive
A field emitter structure with emitter edge comprising of individual comb elements. A resistive film is inserted between the lead-in conductor and the emitter...
Shunt phototransistor with reverse bias protection
A phototransistor is provided with a first resistor that operates as a shunt and a second resistor that operates to protect the device from damage that could be...
Lightwave phase control for reduction of resonator fiber optic gyroscope
Kerr effect error
An error reducer for reducing rotation rate errors arising because of an optical Kerr effect occurring in a coiled optical fiber in a rotation sensor. Through...
Apparatus for controlling temperature of an element having a temperature
A fast and accurate temperature controller for a device heated by current through a resistive element, such as various air data probes, wherein the resistance of...
Complementary thread display method and apparatus
A complementary threat display where threat data provided by a pulsed radar jammer and a continuous wave radar jammer are correlated with the threat data...
Dual GPS timer apparatus and method
A GPS utilizing redundant GPS receivers having position and time mark outputs connected directly to a processing block so that the time marks from both GPS...
System and method for modifying security in a security system
A system and method for modifying security levels within a security system. External modifications are allowed only if the security of a point is increased.
FET having minimized parasitic gate capacitance
A HIGFET having a gate pad situated over a non conducting portion of the channel layer of the heterostructure wafer. The method of producing this device involves...
Method for the automatic optimization of a heating curve
A method for the automatic optimization of the heating curve of a heating controller in a heating plant is devised, whereat the heating curve is approximated by...
Fan coil thermostat with circuitry to assure minimum power for relay
A thermostat capable of accommodating primary and secondary loads is taught. Preferably a hydronic valve actuator is the primary load and a fan coil of variable...
Apparatus for mounting an absolute pressure sensor
An absolute pressure sensor subassembly includes a top cap bonded to a pressure sensor die and enclosing a reference vacuum. The subassembly is initially held in...
Unit tray hold down mechanism
The hold down apparatus securely engages a unit onto a tray. The tray includes an opening having a front block on the underside of the tray at the opening. The...
Dual core air-to-air heat exchanger
An air exchanger for continuously exchanging indoor air with outdoor air to provide a constant supply of fresh air into a structure which includes a heat...
Static pressure compensation of resonant integrated microbeam sensors
A temperature and static pressure compensated differential pressure sensor includes a semiconductor substrate in which a flexible, pressure responsive diaphragm...