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| Patent # | Description |
|---|---|
| US-4,679,002 |
Electromagnetically shielded narrow band electroencephalographic
amplifier A low noise, high gain differential amplifier suitable for EEG amplification is constructed in a shielded metal enclosure, preferably on a ground plane circuit... |
| US-4,679,001 |
Adaptive stop-notch filter A filter suppresses energy at time varying or ensemble varying frequencies. The filter comprises multiplier sections having sets of values which are dynamically... |
| US-4,679,000 |
Bidirectional current time integration device A bidirectional current-time integrator device comprises a shunt for connection in a circuit and an integrating circuit having inputs connected to opposite ends... |
| US-4,678,999 |
Charge depletion meter A charge depletion meter apparatus having a current to frequency converter to sense and convert the current drain of a battery source to a digital signal which... |
| US-4,678,998 |
Battery condition monitor and monitoring method A battery condition monitor and monitoring method uses known relationships between battery impedance, remaining capacity and remaining service life at different... |
| US-4,678,997 |
Method and apparatus for dielectric well logging of subsurface earth
formations with a lumped constant antenna Method and apparatus for use in introducing electromagnetic energy into subsurface earth formations and acquiring measurements relating to propagation of such... |
| US-4,678,996 |
Magnetic resonance imaging method Hybrid fast scan magnetic resonance imaging is performed by using, for example, both a two dimensional Fourier transform (2DFT) method using phase encoding prior... |
| US-4,678,995 |
Apparatus and method for determining the presence of substances in a
sample by NMR and producing an NMR image... An apparatus and method of unambiguously determining the presence of specific substances in a sample by NMR and then obtaining a high resolution NMR image of... |
| US-4,678,994 |
Methods and apparatus employing apparent resonant properties of thin
conducting materials Methods and apparatus for sensing, switching and modulating relying upon apparent resonant properties of thin conductive materials are provided in accordance... |
| US-4,678,993 |
Distance measuring device operating with torsional ultrasonic waves
detected without mode conversion The invention relates to an ultrasonic distance measuring device for linear distance measurement comprising a tube of magnetostrictive material, a magnet... |
| US-4,678,992 |
Electronic metal detector A metal detector circuit comprising an oscillator capable of sensing any type of metal in motion over a predetermined frequency. The oscillator supply voltage is... |
| US-4,678,991 |
Inductive displacement transducer with unipolar output A unipolar signal indication of core position is provided in an inductive displacement transducer, such as an LVDT, as the sum magnitude of the transducer's... |
| US-4,678,990 |
Motor monitor signal analysis system A signal analysis system for a magnetic field motor monitor utilizes an analog-to-digital converter for sampling the motor magnetic field at accurately... |
| US-4,678,989 |
Optical absorption spectroscopy for semiconductors Optical absorption data for a semiconductor sample is derived by providing a p-type layer (4) of the semiconductor sample between two larger band gap p-type... |
| US-4,678,988 |
Method and apparatus for spectral analysis of a signal at a measuring
point With the method and apparatus for the detection and/or imaging of a measuring point which carries a voltage at least of a specific frequency, wherein, in a... |
| US-4,678,987 |
Feature extractor for quasi-periodic signals The purpose of the disclosed structure is to extract features from the emissions of quasi-periodic signal sources, such as piston engine powered vehicles and the... |
| US-4,678,986 |
Electric transformer with selectively energized modular circuits An electric transformer for supplying an adjustable electric magnitude, especially for regulating purposes, includes several modules having therebetween a binary... |
| US-4,678,985 |
Two-terminal line-powered control circuit A two-terminal line-powered control circuit is disclosed in which a triac is used to switch AC power to a load. When the triac is not conducting, a portion of... |
| US-4,678,984 |
Digital power converter input current control circuit A digital power converter input current control circuit is connected between a power converter and a power source. This circuit monitors, and controls if... |
| US-4,678,983 |
DC power supply with adjustable operating point The invention relates to a DC power supply having an adjustable current/voltage (I/V) operating point. The power supply comprises a solar cell (1) and buffer... |
| US-4,678,982 |
Supplemental automotive vehicular heater system and method of providing
same A supplementary heating system particularly suitable for an automotive vehicle comprises a step down transformer coupled to the stator windings of the vehicle's... |
| US-4,678,981 |
Portable power source for mobile storage carriage A portable electrical power source to provide electrical energy to movable carriages of mobile storage systems during an electrical power failure, a malfunction... |
| US-4,678,980 |
Power failure stop circuit for a converter The voltage in a converter 20 is compared with a reference voltage to detect an input power failure, in response to which a motor driven by the converter is... |
| US-4,678,979 |
Apparatus for controlling the carriage of a printer An apparatus for controlling the carriage of a printer equipped with a stepping motor for reciprocating the carriage with a printing head comprising a power... |
| US-4,678,978 |
Quieting circuits for permanent magnet synchronous motors Quieting circuits for synchronous electric motors bypass their phase shifting coils with a minor percentage of the total motor watts input. |
| US-4,678,977 |
Setpoint controller A dual setpoint controller system comprising first (24) and second (26) setpoint controllers. Each setpoint controller comprises a target counter (30, 80) for... |
| US-4,678,976 |
Path-controlled machining method A CRT or other screen display represents a preliminary trace during an EDM or other electrical machining operation upon which can be superimposed a trace... |
| US-4,678,975 |
Motor control circuit for motor driven power windows A control circuit for a reversible D.C. window drive motor that allows for one touch operations of the motor to automatically lower the associated window to its... |
| US-4,678,974 |
Pulsating current electromotor without commutator A pulsating current electromotor without commutator comprises a permanent magnet type or electromagnetic type rotor keyed on a rotating shaft and having the... |
| US-4,678,973 |
Sensorless starting control for a brushless DC motor A sensorless control system for reliably starting a brushless DC motor even when the motor/load inertia is relatively high and even though the rotor may be... |
| US-4,678,972 |
Self-starting single-phase brushless DC motor and control therefor The stator winding of a single-phase brushless DC motor with symmetrical rotor and stator air gap geometry is comprised of two serially connected relatively... |
| US-4,678,971 |
Linear motor and control method thereof A linear motor comprises a first magnetic pole having a plurality of uneven magnetic pole teeth of magnetic material arranged longitudinally at predetermined... |
| US-4,678,970 |
Power as required beam deflection system for CRT displays with raster
supply switching An electron beam magnetic deflection system capable of raster and stroke deflection and providing minimum power dissipation in raster mode. Automatic switching... |
| US-4,678,969 |
Pseudo-raster weather display apparatus A display system employing a stigmator coil disposed on the neck of a cathode-ray tube to widen an electron beam primarily in a direction normal to the electron... |
| US-4,678,968 |
High intensity discharge lamp starting and operating apparatus Starting and operating apparatus for high intensity discharge lamps includes first and second pairs of terminals formed for connection to an AC source and a... |
| US-4,678,967 |
Fluorescent display panel A display panel has an evacuated envelope with at least one transparent panel. Phosphor is deposited inside the panel at locations which are visible through the... |
| US-4,678,966 |
Fluorescent lamp having two phosphor layers A fluorescent lamp has two layers of different phosphors, the underlying phosphor serving to improve the maintenance of the overlying phosphor. |
| US-4,678,965 |
Electron tube An electron tube comprises a tubular glass envelope portion (10) having a central axis m and an inside diameter D. In the envelope portion (10) an electrode... |
| US-4,678,964 |
Color display tube A field correction element (30) is provided in the peripheral field of a focusing lens of an electron gun system of a color display tube to reduce the potential... |
| US-4,678,963 |
Shadow mask for a colored image tube and image tube comprising the same In colored image tube having a perforated mask for the selection of colors in order that an electron beam intended for one color only reaches on the screen the... |
| US-4,678,962 |
Image pickup tube In an image pickup tube comprising a glass bulb, a face plate, a target surface, a mesh electrode arranged in opposition to the target surface, and a mesh holder... |
| US-4,678,961 |
Projection television display tube with improved cooling Projection television display tube comprising an evacuated envelope having a display window provided on its inside with a display screen, a transparent second... |
| US-4,678,960 |
Metallic halide electric discharge lamps A high intensity gaseous discharge lamp employs a discharge medium which emits radiation at multiple, narrow line wavelengths which combine to produce white... |
| US-4,678,959 |
Device for cooling the pinch seal of an electric lamp, and an electric
lamp and an irradiation apparatus... The pinch seal (12) of an electric lamp (11) is kept during operation at a lower temperature by a metal envelope (10), space between this metal envelope (10) and... |
| US-4,678,958 |
High pressure sodium vapor lamp with improved color reproduction index The invention relates to a high pressure sodium vapor lamp having improved color reproduction index, which has a discharge vessel (1) placed in an outer envelope... |
| US-4,678,957 |
Piezoelectric ceramic switching devices and systems and methods of
making the same Improved piezoelectric ceramic switching devices are described along with their method of fabrication. In addition to the devices themselves, novel electric... |
| US-4,678,956 |
Vibration wave motor A vibration wave motor uses electrostrictive vibrator elements itself as a vibration member, and the rotor of the motor is driven by contacting the ... |
| US-4,678,955 |
Piezoelectric positioning device A relatively stiff piezoelectric translator comprises at least a pair of piezoelectric devices joined together at one end and secured to a fixed support at their... |
| US-4,678,954 |
Rotor with permanent magnets having thermal expansion gaps A pair of positioning rings are engaged on the outer peripheral surface of a shaft, and a plurality of permanent magnets are provided on the outer surface of the... |
| US-4,678,953 |
Motor mount assembly It is conventional to use an electric motor for each device requiring such a drive even although only one such device may be used at one time, because it is... |
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