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| Patent # | Description |
|---|---|
| US-4,839,623 |
Magnetic core blanks of magnetically permeable sheet material Magnetic cores are manufactured from blanks of magnetically permeable sheet material that have core preforms including strip elements that are partially... |
| US-4,839,622 |
Transformer core clamping structure A transformer core and coil assembly comprising a core including first and second generally vertical, spaced-apart portions, first and second coils respectively... |
| US-4,839,621 |
Electromagnetic actuator having improved dampening means A print mechanism has a laterally spaced longitudinally driven actuator or slider mounted between two electromagnets. By selective actuation of the ... |
| US-4,839,620 |
Solenoid actuated control cable A solenoid-actuated control cable comprising a solenoid having one moving core and one set of a first coil and a second coil disposed along the direction of... |
| US-4,839,619 |
Relay for wideband signals A relay for wideband signals is provided having a rotor which includes a permanent magnet structure, an armature, and a microstrip pattern for selectively... |
| US-4,839,618 |
Monolithic crystal filter with wide bandwidth and method of making same A monolithic coupled-dual resonator crystal filter is produced for operation with wide bandwidths (especially at high center frequencies) by providing an... |
| US-4,839,617 |
Bandpass filter circuit arrangement A bandpass filter comprises a reactively intercoupled pair of parallel-resonant circuits (1, 2) to one of which a pair of signal input terminals (15, 16) are... |
| US-4,839,616 |
Broadband impedance transformer A transformer for modifying the characteristics impedance of a transmission line. The transformer provides non-integer-squared impedance transformation ratios... |
| US-4,839,615 |
Frequency modulating circuit for video tape recorder A frequency modulating circuit comprising a circuit for separating a synchronizing signal from an input signal, a circuit for generating a sampling pulse in... |
| US-4,839,614 |
Frequency referencing system and method A system and method of referencing frequencies of radiation from a plurality of sources, for example lasers (1,2) includes filter element (11), such as a... |
| US-4,839,613 |
Temperature compensation for a disciplined frequency standard A disciplined frequency standard includes an adaptive control loop to correct for ambient temperature effects. The crystal resonator of the disciplined frequency... |
| US-4,839,612 |
High-frequency power amplifier having heterojunction bipolar transistor A class C power amplifier has a heterojunction bipolar transistor as an element for amplifying an input signal. A d.c. bias voltage source, such as a d.c.... |
| US-4,839,611 |
Voltage controlled high-frequency attenuator A continuously variable, passive attenuator including a signal path between an attenuator input node and an attenuator output node, the signal path including a... |
| US-4,839,610 |
System for automatically controlling the gain-bandwidth product of
operational amplifiers A system for automatically controlling the gain-bandwidth product of operational amplifiers, wherein a gain-bandwidth product (G*B) of one of the amplifiers... |
| US-4,839,609 |
Differential amplifier To provide a high-speed wide-dynamic range differential amplifier, the amplifier comprises first and second FETs having source terminals connected to each other... |
| US-4,839,608 |
Circuit layout to eliminate alternating voltage interference signals AC interference signals are eliminating during amplification of certain DC signals of interest in a low-pass amplifier by providing an auxiliary AC amplifier in... |
| US-4,839,607 |
Frequency-doubling amplifying surface wave receiver An amplifying surface wave receiver for a surface wave element composed of a material which has the piezo effect and which can be rendered electrically... |
| US-4,839,606 |
Digital FM demodulator signal-to-noise improvement Audio beat notes produced by sampling a square wave in a digital quadrature FM demodulator are reduced by adding random noise, or dither, to the signal to be... |
| US-4,839,605 |
Signal compensation circuits A detection system for a sliding lift or elevator door comprises at least two sensors for monitoring the door opening. The sensors are arranged to detect the... |
| US-4,839,604 |
Integrated circuit with clock distribution means for supplying clock
signals An integrated circuit which includes a plurality of input storage circuits, each of which has a first input terminal, a first output terminal and a first clock... |
| US-4,839,603 |
Multiple-loop microwave frequency synthesizer using two phase lockloops A multiple-loop microwave frequency synthesizer is provided with an upper and a lower phased-lock loop. The phased-lock loops are mutually connected to a novel... |
| US-4,839,602 |
Means for detecting metal in a stream of particulate matter A device having a detector element for detecting small particles of metal moving in a stream of particulate matter, such as tobacco filler. The detector element... |
| US-4,839,601 |
Directional current finder An electrical detection system for locating a position of interest in a medium which is electrically conductive includes a signal generator, a source, a sink and... |
| US-4,839,600 |
Ammeter for use with A.C. electric power lines The invention provides an ammeter specially suited for measuring the currents passing in high voltage, high power A.C. lines and, when required, storage of the... |
| US-4,839,599 |
Multipiece cable testing device which functions as flashlight,
continuity checker, and cable identifier A coaxial cable testing device has a modular construction wherein the several pieces may be configured in different arrangements to fulfill the separate... |
| US-4,839,598 |
Method for testing underground electric cables Breaks in the bare neutral conductor of an underground electric cable can be located by applying an alternating signal across the neutral conductor and a phase... |
| US-4,839,597 |
Battery condition monitoring system The present invention is an improved method and apparatus for monitoring a battery supply by comparing the monitored battery voltage against average discharge... |
| US-4,839,596 |
Transmitting/receiving system for magnetic resonance imaging system A transmitting/receiving system for use in a magnetic resonance imaging system includes a first coil section used for both transmission and reception, a... |
| US-4,839,595 |
Magnetic resonance apparatus with a decoupling detection surface coil A surface coil used as a measuring coil in a magnetic resonance apparatus is divided into at least two coil portions having opposite directions of winding and... |
| US-4,839,594 |
Faraday shield localized coil for magnetic resonance imaging Magnet (12) creates a main magnetic field along a z-axis through an image region. A localized coil (D) is disposed in the image region at least to receive... |
| US-4,839,593 |
Transient electromagnetic method for directly detecting corrosion on
conductive containers There is disclosed a method for directly detecting corrosion on the walls of conductive containers wherein a transmitting antenna induces a current into a... |
| US-4,839,592 |
Operator input responsive system and method for selectively identifying
verified object flaws A system for verified detection of flaws in an object, comprises a synchronizing sensor for generating an output signal once per mutual rotational revolution as... |
| US-4,839,591 |
Magnetic stroke sensor for detecting the stroke of a fluid-power cylinder A method for easy and accurate positioning of a magnetic sensor in a fluid-power cylinder facing a magnetic scale on the lateral surface of a piston rod, wherein... |
| US-4,839,590 |
Piezoelectric actuator for magnetostrictive linear displacement
measuring device A liquid level detector of the type in which a magnetostrictive wire extends through the liquid level measurement range and is captured in a tensioned vertical... |
| US-4,839,589 |
Method and circuit for determining the speed of rotation of a rotating
machine A method is presented in which at least one of the sinusoidal voltages (U.sub.S) which is induced in the stator windings by the residual magnetism or remanence... |
| US-4,839,588 |
Method for the examination of electrically active impurities of
semiconductor materials or structures and... A method for the examination of electrically active impurities of semiconductor materials or semiconductor structures is disclosed. The method comprises the... |
| US-4,839,587 |
Test fixture for tab circuits and devices A test fixture for TAB (Tap Automated Bonding) circuits includes circuit boards for maintaining a characteristic impedance to inner lead bond areas of a circuit... |
| US-4,839,586 |
Apparatus for irradiating electronic circuits An apparatus for irradiating electronic circuits, applicable to testing the electronic circuits subjected to cosmic radiation and also to the simulation of other... |
| US-4,839,585 |
Magnetic field sensor coil for being fitted around a motor shaft A magnetic field sensor coil wherein the coil is formed into a shape comprising two generally C-shaped limbs (2, 3) one within the other, one of these limbs... |
| US-4,839,584 |
Signal level display device for recording/reproducing apparatus A signal recording/reproducing apparatus having both bar-type and numeric signal-level displaying units which can be easily read. The apparatus includes a... |
| US-4,839,583 |
Signal analyzer apparatus with analog partial sweep function A frequency converter converts an input signal into an intermediate frequency signal corresponding to a local oscillation signal to be analog-swept from a local... |
| US-4,839,582 |
Signal analyzer apparatus with automatic frequency measuring function In a siganl analyzer apparatus, a signal received while a local oscillator is swept in a analog manner is selected and detected by an IF circuit using a desired... |
| US-4,839,581 |
Absolute electrical potential measuring apparatus and method A hermetically sealed, electrically insulative enclosure (A) is surrounded by a Faraday cage (B). At least one electrode (C) is disposed within the hermetically... |
| US-4,839,580 |
Plated sensor for monitoring corrosion or electroplating A high sensitivity electroplating or corrosion sensor and method for sensing, employing a relatively strong, self-supporting electrically conductive substrate of... |
| US-4,839,579 |
Resistive steering sensor A steering sensor is installed in a vehicle by utilizing a clearance between a steering wheel and a turn signal switch assembly. This makes it possible to... |
| US-4,839,578 |
Method for removing phase instabilities caused by flexure of cables in
microwave network analyzer measurements A method for removing phase errors from RF signals generated by movement of the cable interconnecting a network analyzer and a device under test. The method... |
| US-4,839,577 |
Current-controlling circuit A current-controlling circuit for producing either a constant current, independent of supply potential or a current which decreases with increasing supply... |
| US-4,839,576 |
Controller for AC generator in vehicles A controller for an AC power generator in vehicles having a rectifier for rectifying an AC output of an AC power generator equipped with a field coil, a battery... |
| US-4,839,575 |
Alternator regulator having output monitoring and limiting controls An alternator regulator includes a status sensor connected to monitoring the connection of a voltage sensor to the alternator and a separate current limited... |
| US-4,839,574 |
Generator system utilizing a fuel cell In a generator system having a fuel cell and a battery to which an output current is supplied from the fuel cell, the output current from the fuel cell is... |
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