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Portable space heater
Bi-directional DC/DC voltage converter
A bi-directional DC/DC voltage converter having first and second input/output terminals for respectively receiving on a mutually exclusive basis uni-directional...
Coherent pickup error cancellation device
A device for eliminating coherent pickup error in a fiber optic gyroscope. The polarity of the drive signal to the phase modulator of the gyroscope is switched...
Air circulation controller with short-cycle prevention capability
A method and system for improving indoor air quality by controlling the circulation of air by a system fan of a conventional environmental control system in...
Current confinement for a vertical cavity surface emitting laser
A vertical cavity surface emitting laser having a planar structure, having an implantation or diffusion at the top of the mirror closest to the substrate or at...
Electronics assembly formed with a slotted coupling device that absorbs
mechanical forces, such as vibration...
An electronics assembly is described which allows three-dimensional movement of a printed wiring board (PWB) relative to an attached electronics subassembly. The...
Coating delicate circuits
Protective and security coatings are applied to an integrated circuit by periodically passing the integrated circuit through a flame spray containing molten...
Damper actuator controller having an enthalpy sensor input
A low-cost, accurate enthalpy sensor is described. The invention provides an on/off output which reflects the result of a comparison between the enthalpy level...
Spindle nut/threaded spindle device
A device for converting the rotation of a spindle nut into a force-related linear translation of a threaded spindle in an electromechanical valve actuator, the...
Navigation system with solution separation apparatus for detecting
A navigation system, incorporating a unique method for detecting failures and determining an accuracy or error bound, has a receiver for receiving signals from...
Force sensor with multiple piece actuation system
A force sensor is provided with a two piece actuation system. A first actuator is disposed in contact with the pressure sensitive component and a second actuator...
Method for attaching small components to each other
A method is provided to heat a plurality of components to a preselected temperature that creates a tackiness at the surface of a preformed solder component and...
Control valve abnormality detection method and apparatus
In a control valve abnormality detection method of detecting abnormality in a control valve, a characteristic expression representing the relationship between...
Method for testing a turbidity sensor
A method is provided to test turbidity sensors using a solid block that is particularly formulated to have a predetermined turbidity value. The solid block,...
Humidity sensing circuit
A humidity sensing circuit uses a humidity sensitive capacitor as a circuit element in an RC control network for a timer/multivibrator circuit. As the voltage on...
Thermal conductivity measuring device
A thermal conductivity measuring device includes a diaphragm portion, a thermal conductivity detector, a temperature sensor, a control section, and a thermal...
Magnetic hardening of bit edges of magnetoresistive RAM
Magnetoresistive random access memory bit edges are magnetically hardened to prevent bit edge reversal.
Apparatus for providing a nonlinear output in response to a linear input
by using linear approximation and for...
An amplifier which outputs a nonlinear function in response to a linear input. The nonlinear response is a piece-wise linear approximation. The circuit includes...
MOS device having a gate to body connection with a body injection
current limiting feature for use on silicon...
A MOS transistor formed in a silicon on insulator structure includes a rectifying connection between a body portion and the gate. The connection decreases the...
Filter air cleaner
A portable air cleaner having a cylindrical filter element mounted on a circular base and encased by a cylindrical cover. A centrifugal fan mounted within the...
Building management system having set offset value learning and set bias
value determining system for...
A building management set value decision support apparatus includes a thermal environment index calculation/display section, and a pseudo-thermal environment...
High efficiency polarized display
An image display apparatus which employs a polarization-sensitive scattering element (PSSE). In the display, a light source is used to illuminate a panel which...
Subtractive color LCD utilizing circular notch polarizers and including
a triband or broadband filter tuned...
A subtractive color liquid crystal display employing circular polarizers. In the subtractive color display each picture element has three liquid crystal...
Stick-slip detection method and apparatus
In a stick-slip detection method, the displacement of a movable member having a slidable contact portion is detected. A first quantity of state is calculated on...
Self checking temperature sensing circuit
A self-checking temperature sensing circuit in which temperature sensitivity is provided by first and second resistive elements having positive and negative...
Sensor with an arcuate abradable rib used for positioning
A sensor is provided with a rib that extends from its sensing face. The rib is arcuate to conform to a surface of a rotatable object. The rib can be a continuous...
Method for making a thin film resonant microbeam absolute
A micromechnical sensor having a polysilicon beam that is an integral part of the diaphragm resulting in a frequency of the beam that is a direct result of the...
Three dimensional lateral displacement display symbology which is
conformal to the earth
An aircraft display communicates three dimensional lateral information to a pilot of the aircraft. An extended course centerline symbol and lateral deviation...
Self-limiting intrinsically eye-safe laser utilizing an increasing
A laser is manufactured with an increasing absorption layer disposed within one of the mirrors of the laser. The increasing absorption layer exhibits an...
Method and apparatus for conformal runway alignment on a head up display
An aircraft display system positions a synthetic runway which is properly aligned with a target runway even during crosswind approaches. The relative position of...
Resistance to frequency circuit for measuring ambient temperature on a
A resistance to frequency circuit for measuring the ambient temperature on a thermostat. The temperature measuring circuit comprises a first Schmitt trigger NAND...
Pressure sensor with reduced dead space achieved through an insert
member with a surface groove
A pressure sensor is provided with an insert member that reduces the dead space of a fluid conduit used to provide fluid communication between a pressure...
Oscillating window fan
A portable electric window fan including a housing having side walls, a bottom wall for mounting on a sill of a window, a top wall for engaging a sash of the...
Method for process system identification using neural network
The method of making the tool, for process system identification that is based on the general purpose learning capabilities of neural networks. The method can be...
Ambiguous dial indicator with saturating setpoints
An ambiguous dial indicator intuitively communicates the relative value of setpoints to an operator. The ambiguous dial indicator includes an ambiguous scale and...
Off-path descent guidance by a flight management system
A method for providing off-path guidance during a descent comprises the steps of determining a current altitude (H) and a corresponding current horizontal...
Switch actuator with multiple controls and a single switch
A switch actuator is provided in which any one of a plurality of rotatable cams is capable of actuating a single switch simultaneously with controlling another...
Thermal comfort controller
A controller for a climate control system has a relative humidity sensor as well as a dry-bulb temperature sensor within the enclosure. The humidity value is...
Light source monitor with compensated tracking ratio
A laser monitor is provided with a light sensitive component disposed near the laser and spaced apart from two windows that are generally parallel to each other....
Solid state AC switch with self-synchronizing means for stealing
A solid state power switching circuit for alternating current loads, in which operating power for the circuit is diverted from the switched current during power...
Servo pressure regulator for a gas valve
An electromechanical actuator-operated pressure regulator for supplying control pressure for a diaphragm-operated gas control valve, the actuator also operating...
Methods and apparatus for protecting the integrity of process data
stored on a removable storage medium
Methods and apparatus for preventing the loss and/or corruption of process data stored by data collection and/or test instruments (referred to hereinafter...
Method for characterizing the nature of fluid in machine for washing
A method is provided to characterize the nature of a washing fluid by measuring the turbidity and conductivity changes during preselected periods, such as rinse...
Ultraviolet binder for phosphor fluorescent light box
A phosphor binding material and process is shown and described for LCD backlight systems. The improved process provides a residual phosphor binding material...
Magnetic sensor with a magnetically sensitive component that is movable
during calibration and rigidly...
A magnetic sensor is provided which utilizes a molded magnet with a channel formed therein. A magnetically sensitive component, such as a Hall effect element, is...
Electromechanically actuated turbidity sensor for a machine for washing
A machine for washing articles is provided with a turbidity sensor that is activated by an electromechanical timer. When activated, the turbidity sensor...
Split field-of-view uncooled infrared sensor
An occupancy sensor having a primary infrared radiation sensor and a secondary infrared radiation sensor in an integrated vacuum package having a window that...
Control system monitor
A process control system (PCS) includes a control network and a plurality of nodes coupled thereto, the PCS controlling a process. A monitoring system,...