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7439821 |
DC to DC transmission system
A DC to DC transmission system includes at least three conductors between a source and a sink, a first switch which alternately connects each conductor to the source, a second switch which...
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6763733 |
Rotational angle detecting device, torque detecting device, and steering apparatus
A target plate 3 is provided onto a shaft 1 and is has targets 3 a arranged on an outer circumference. Facing the outer circumference of this target plate 3 is a sensor 5 that is provided...
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6567249 |
Transformer with electrical isolation protection and power supply unit or voltage converter with a transformer of this type
A invention relates to a transformer having a primary coil and a secondary coil, with a ferromagnetic core inserted in a coil former. The alternating current resistance of the primary coil ( 3 )...
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5956073 |
Noise-limiting transformer apparatus and method for making
Embodiments of the invention include a transformer device having a saturation region for limiting ingress noise and other noise. The transformer comprises a magnetic core, an input coil and an...
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5871662 |
Sintered transformer or inductor core of nizn ferrite material
The invention describes a transformer core of NiZn ferrite material. Said transformer core exhibits low overall losses when it is used in a transformer. Said low losses are attained if the majority...
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5642249 |
Method and apparatus for limiting high current electrical faults in distribution networks by use of superconducting excitation in transverse flux magnetic circuit
The present invention pertains to an electrical fault limiter. The fault limiter comprises a first magnetic core. There is also a second magnetic core opposing the first magnetic core. The fault...
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5490424 |
Pressure sensor with moisture resistance and uniform characteristics
The invention is a pressure sensor including a main body including a pressure inlet at and end thereof, a deformable section deformed by a pressure introduced through the pressure inlet, and a...
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5396802 |
Differential pressure transducer utilizing a variable ferrofluid keeper as an active magnetic circuit element
A differential pressure transducer for measuring external pressures is disclosed. The pressure transducer uses a ferrofluid contained in two interconnecting chambers, enclosed by two non-magnetic...
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5359894 |
Acceleration detector having highly accurate gaps in magnetic circuit including a differential transformer
An acceleration detector includes a magnetic body movable under acceleration, and a differential transformer having primary coils and secondary coils and arranged so that an output differential is...
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5355714 |
Pressure sensor using a pressure responsive magnetic film to vary inductance of a coil
A pressure sensor includes a diaphragm having a magnetic film fixed to one side thereof. The diaphragm is arranged to displace depending on a pressure differential applied thereacross to change an...
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5349868 |
Pressure sensor including bridge circuit for detecting permeability of a magnetic layer
In a bridge circuit of a pressure sensor, resistances are connected in series to the impedances of a pressure detection coil and of a dummy coil for differential provided for deforming and...
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5317948 |
Pressure transducer using permanent magnet and opposing variable magnetic field
An electromagnetic fluid pressure transducer is provided which uses the opposing magnetic fields of a permanent magnet and an electromagnet to sense a change in a differential force. The...
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5315866 |
Indicating device, especially for indicating the state of pressure of a tire
The invention relates to an indicating device, especially for indicating the state of pressure of a tire, of the type that can be fixed to a wheel. The device includes: a mechanism (7) for...
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5303595 |
Pressure sensor utilizing magnetostriction effect
A pressure sensor in which a magnetostriction effect of an amorphous magnetic alloy is utilized. It is an object of the invention to suppress the thermal sensitivity change of the pressure sensor...
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RE34510 |
Pressure sensor
A pressure sensor having the structure wherein an amorphous magnetic alloy member or members are secured to both of a deforming part which is distorted by a pressure and a non-deforming part which...
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5224385 |
Method for obtaining electrical signals correlated with the position of a mass of mercury in instruments and the like
A method of obtaining electrical signals corresponding to the position of a mercury mass movable within a vessel, characterized by the fact that the position of the moving mass within the vessel is...
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5220834 |
Acceleration detector with differential transformer
An acceleration detector has a case and a movable magnetic body mounted in the case and supported by a leaf spring secured to the case. The magnetic body is thus movable in either of two opposite...
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5219041 |
Differential pressure sensor for screw compressors
A pressure sensor, such as the type of sensor used in screw-type refrigeration compressors, permits sensing of positive as well as negative pressures and provides an indication of the direction in...
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5070736 |
Differential pressure sensor with read-out device
A differential pressure sensor comprises a pair of bourdon tubes disposed in an arrangement wherein deflections of the two bourdon tubes resulting from fluid pressures connected thereto take place...
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4976151 |
Method and device for detecting blocked condition in a tube of a liquid infusion pump
A detector for a blocked condition in a tube of a liquid infusion pump includes a moveable shaft which is kept in contact with the outer wall of a flexible tube for transporting a liquid...
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4953393 |
Transducer
A passive electrically operable monitoring means has an inherent resistance and a characteristic capacitance and inductance only, so that the monitoring means has a predetermined natural frequency...
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4937553 |
Electrohydraulic device for continuously monitoring the pressure in a hydraulic brake system for automotive vehicles
An electrohydraulic device is suggested for continuously monitoring the pressure in a hydraulic brake system for automotive vehicles, in particular for outputting electric control signals in...
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4923307 |
Dilatometer
An improved dilatometer suitable for testing the coefficient of thermal expansion (CTE) of a workpiece. The workpiece having a CTE in the range of -0.2×10 -6 inch/inch °F. to 0.2×10 -6 ...
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4912409 |
Actuator displacement transducer having external flux excluding tube
A linear displacement transducer has an elongated current conducting, tubular coil which is mounted to an end cap in a hydraulic or pneumatic cylinder and extends into a hole bored in the...
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4890084 |
Inductance strain gauge
Side-by-side inductor coils are wound in a single layer around a thin flat tubular frame. The frame has a closed end portion and is mounted on an insulative base sheet. An elongated thin magnetic...
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4845986 |
Liquid level indication device
A liquid level indicator for detecting a liquid level by utilizing the variation inductance of a coil having a core made of an electrical insulating magnetic material and provided inside a winding...
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4829828 |
Pressure transducer
A pressure transducer suitable for use in high temperature environments includes two pairs of induction coils, each pair being bifilarly wound together, and each pair of coils connected as opposite...
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4825184 |
Current controlled inductor
A current controlled inductor (1) having an inductor coil (4) in one state of alteration attached at one end to a displacing coil (6) in an opposite state of alteration to that of the inductor coil...
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4805463 |
Torque transducer
A torque transducer (10) generates a signal representing torque applied to an input shaft (12) to the transducer. The input shaft is resiliently connected to an output shaft (14), permitting...
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4788867 |
Differential pressure detector
A liquid filled differential pressure detector comprises two pressure sensors. Each sensor is constructed of one or more capsules, which are pairs of diaphragms sealed at their peripheries. The...
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4777827 |
Digital pressure gauge
Apparatus is disclosed in which a digital display is driven by an electronic output generated in response to field changes which occur when a transformer interacts with a magnetic core driven in a...
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4733563 |
Fluid pressure transmitter for use in potentially explosive atmospheres
A fluid pressure transmitter suitable for use in potentially explosive atmospheres of the type comprising a measuring transducer provided with inductive, capacitive or resistive sensor means, the...
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4712648 |
Dual magnetic coil driver and monitor sensor circuit
Sensor circuitry is disclosed for a transducer (32) having a sensor or delta coil (66) for generating a magnetic flux through a path of movement of a magnetically permeable piston member (48), such...
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4696192 |
Fluid pressure sensor
A fluid pressure sensor includes a body made of a soft magnetic material with a groove formed therein, and a coil is installed in the body in the groove. One magnetostrictive disc is placed on the...
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4690004 |
Variable-reluctance transducer
A four-active-arm variable-reluctance transducer which provides a high-level output signal, enabling detection and measurement of minute variations of the measured parameter while that parameter is...
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4680976 |
Torque or angle of torsion measuring device
The device comprises a shaft to which is applied a torque to be measured. The shaft is mounted in two ball bearings which are secured in a pair of supports coupled by a cylindrical metallic piece...
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4671116 |
Fluid pressure transducer
A pressure transducer of the type providing a continuous electrical output signal indicative of the variation in sensed pressure having a metallic preferably aluminum armature attached for movement...
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4665753 |
Inductive differential pressure sensor
A measuring diaphragm (1) separates in a pressure-tight manner two half chambers (9, 10) suitable for being respectively subjected to two pressures to be compared. In a central zone of the...
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4662226 |
Pressure transducer
A pressure-measuring transducer device for transforming a change of tested pressure into a change of output signal frequency. Variable reluctance sensing elements and an FM IC block are assembled...
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4658644 |
Manometer device for continuous monitoring of the air pressure in vehicle tires
A manometer device for continuous monitoring of the air pressure in vehicle tires is described which consists of a manometric capsule and an electrical indicator device associated therewith. A...
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4627292 |
AC transducers, methods and systems
A position and motion transducer is described comprising means for providing a permanent magnetic field adjacent an appropriately oriented toroidal transformer, which can be either an isolation...
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4625562 |
Amorphous magnetic alloy sensor
A stress or strain sensor including a magnetic circuit having at least a part constituted by an amorphous magnetic alloy. For detection of the inductance value of the sensor, a DC magnetic field is...
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4581941 |
Combined electronic pressure transducer and power switch
A pressure switch and transducer arrangement combines into a single unit both a power contact switch for providing power to an automobile fuel pump in response to a predetermined minimum oil...
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4548515 |
Multiple sensor dilatometer
Dilatometers are described which employ measuring heads having multiple linear variable differential transformer dilation sensors for concurrently measuring the thermal dilation of multiple...
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4538465 |
Electronic transmitter for transmitting pressure values of industrial process fluids
An electronic transmitter for transmitting pressure values of industrial process fluids includes an inductive sensor employing a measuring diaphragm which is movable as a function of the pressure...
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4521119 |
Constant load dilatometers
Differential dilatometers are described which employ a linear variable differential transformer dilation sensor in which the core and/or coil is independently supported to accommodate the...
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4510474 |
Inductive pickup for fluid control element
A pressure medium-tight inductive pickup for a fluid control element has a pressure pipe composed of a non-magnetic material, a magnetic core received in the pressure pipe, connecting means at the...
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4480225 |
Improved multi-directional eddy current inspection test apparatus for detecting flaws in metal articles
Apparatus is described for detecting flaws in a tubular workpiece in a single scan. The coils of a dual coil bobbin eddy current inspection probe are wound at a 45° angle to the transverse axis of...
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4462015 |
Electromagnetic pick-off control handle
A joystick mechanism generates output signals corresponding to the X and Y components of a manual command. A transducer mounted in a housing includes a ferromagnetic vane member connected to the...
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4450716 |
Process and device for measuring the pressure of tires, particularly for aircraft
A device for measuring the pressure of tires, particularly for aircraft, comprising a passive sensor adapted linearly to convert a variation in pressure into an electrical information variation, in...
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