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7608346 |
Magnetic field sensor
A magnetic field sensor, in particular an rpm sensor and/or rotational direction sensor and/or position sensor for the drive train of a motor vehicle, has a sensor array, with a sensor element that...
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7573255 |
Meter
A hollow box-shaped mover or a needle is moved, without using a power transmission mechanism midway, to a portion according to a measured value of a graduation portion, by housing the mover between...
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6940269 |
Meter unit having magnetic pointer position detector
A speed meter unit has a magnetic pointer position detector, including an output coil, a detection coil and a magnetic piece. The output coil generates magnetic flux. The detection coil is for...
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6538423 |
Coil-type meter
Provided is a coil instrument which can maintain a compact configuration even when a rotary shaft at a pointer side is subjected to a deceleration rotation by way of gears. The coil instrument...
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6531864 |
High torque electromagnetic devices
A high torque electromagnetic device such as a moving magnet galvanometer includes a composite electromagnetic coil. The composite electromagnetic coil includes two pancake-shaped coil parts made...
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6362616 |
Flat response temperature gauge with a single diode
An analog gauge includes a coil assembly and a permanent magnet fixedly attached to a rotatable shaft whereby magnetically orthogonal stator coils are disposed about the permanent magnet. The shaft...
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6323637 |
Miniature crossed coil gauge having an active flux ring
A miniature crossed coil gauge is provided having an oriented rare earth magnet fixedly mounted on a rotary shaft for supplying a magnetic flux directed transverse to the shaft axis. The gauge...
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6304072 |
Pointer resetting mechanism for a magnet disc operated gauge
A pointer resetting mechanism for a magnet disc operated gauge mainly adapted for use in vehicles is made up of a coil spring particularly housed together with a floatable magnet disc for...
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6294907 |
Cross-coil type indicating instrument
A cross-coil type indicating instrument includes a bobbin having an upper center cylinder and a lower center cylinder, a cross-coil unit disposed around the bobbin, a shaft coaxially and rotatably...
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6249116 |
Driving unit of cross-coil type indicating instrument
A driving unit of a cross-coil type indicating instrument includes a bobbin and a pair of cross-coils crossing each other, a plurality of terminals having an edge portion, a bent portion, and a rod...
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6184674 |
Indicating instrument with migration barriers
Moving magnet indicating instruments in which a damping fluid migration barrier projects from the inside of one wall of the bobbin coil and another damping fluid migration barrier projects from the...
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6130532 |
Indicator movement
The movement has a rectangular section case for accommodating a magnet rotor so as to turnably support the magnet rotor engaged with a pointer spindle. A pair of inner core bobbins wound by an...
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6124774 |
Electromagnetic control motor device, particularly a ratio meter
The present invention relates to an electromagnetically controlled drive device, in particular a ratio meter, the device being of the type comprising: a set of control coils (10, 20); a frame (50)...
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6018240 |
Cross-coil measuring meter driving device having a period range judging means and an after-change supply prevention means
An after-change supply prevention unit prevents a cross coil from being supplied with a driving pulse signal with a duty ratio corresponding to a deflection angle calculated based on a period of a...
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5986445 |
Cross-coil type indicating instrument having a zero-return magnetic projection member
A cross-coil type indicating instrument includes a bobbin, a cross-coil unit disposed around the bobbin, a shaft, a permanent magnet rotor disposed inside the bobbin, a dial having a zero position,...
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5854552 |
Moving magnet indicating instruments with a plurality of damping fluid migration barriers
Moving magnet indicating instruments in which a damping fluid migration barrier projects from the inside of one wall of the bobbin coil and another damping fluid migration barrier projects from the...
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5786688 |
Electrical ammeter including an induction coil
An electrical meter, comprising a housing, a motor magnet mounted relative to a housing for pivotal movement, and an induction clip having an arcuate portion of more than 180 degrees, opposite ends...
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5703290 |
Bobbin assembly for a vehicle instrument gauge
A bobbin assembly for a vehicle instrument gauge is provided. The bobbin assembly includes an upper and a lower bobbin, which together define a chamber therebetween and an axis of rotation...
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5578918 |
Modular two or three coil movement having a magnet homing free cross sectional shape of the shield pot
A modular meter movement having two or more coil assemblies. One embodiment of the meter is modular and includes coil assemblies that are formed as separate parts and configured to be attached to a...
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5550465 |
Driving apparatus for cross-coil type analog indicating instrument
A pulse signal generated by a car speed sensor is converted to an analog voltage by a F-V converter, and two sawtooth signals are formed by two sawtooth current generators based on the analog...
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5497078 |
Method and system for driving an air core gauge with improved pointer resolution
A method and system for driving an air core gauge whereby pointer resolution of an air core gauge is improved across a full range of motion. The method including the steps of generating a first...
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5489842 |
Method and apparatus for determining the rotational position of a magnetic rotor relative to current carrying coils utilizing magnetic coupling between coils
An apparatus includes a rotatably mounted magnetic rotor, a first coil mounted in proximity of the magnetic rotor, the first coil mounted such that, if the coil is flowing with electric current,...
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5463314 |
Gauge with magnetically fixed rest position
An air core gauge for an instrument cluster includes a permanent magnet armature and field coils energized according to an input parameter determine the position of the armature and a pointer...
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5424632 |
Moving magnet optical scanner with novel rotor design
A galvanometer is shown, which includes a cylindrical magnetic rotor polarized into two essentially semi-cylindrical poles on opposite sides of its axis. Two coil portions are disposed on opposite...
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5414350 |
Rotating magnet measuring instrument and method for equalizing coil windings
A rotating magnetic measuring instrument including a form for receiving thereon first and second coil windings, with the second coil being wound within the first coil. The second coil includes a...
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5387860 |
Detachable coils air core movement holder
A detachable coils air core movement holder having aligned upper and lower holders defining a chamber therebetween for housing a magnet with a center shaft extending through the upper holder and...
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5378980 |
Cross coil type indicating instrument with an externally adjustable stopper plate
A cross coil type indicating instrument is improved in that a coil bobbin keeps a torque sufficient to hold a stopper plate as a zero point stopper to prevent a positional deviation of the stopper...
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5359284 |
Air core gauge magnetic hysteresis compensation
An air core gauge apparatus includes a sensor for determining a measure of a parameter, a microprocessor controller receiving the measure of parameter from the sensor and operative to (a) determine...
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5357196 |
Circuit for converting a frequency of an input signal so a signal having a digital value corresponding to the frequency
A measuring circuit with a simple circuit configuration is capable of correcting dispersion of a characteristic of a display apparatus and of displaying the measurement result. The measuring...
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5311118 |
Ripple elimination in a frequency-to-voltage converter for a cross-coil meter
A frequency-to-voltage converter comprises a pulse generator, an integrator, an inverting amplifier, and a superimposing circuit. The pulse generator generates a pulse signal having a predetermined...
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5309087 |
Air core gauge, multi-frequency pulse width modulator system therefor
A pulse-width modulation system provides means for controlling dual-coil, air-core gauges at a various rates over 360 degrees. The system moves a dial needle from one octant of the gauge to the...
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5267526 |
Cross-coil type indicator
A cross-coil type indicator including a coil bobbin around which a pair of coils are wound while intersecting each other at a right angle, a magnet rotor rotatably supported in a hollow space of...
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5243752 |
Process of manufacturing an instrumentation apparatus with curable internal magnets
An instrumentation apparatus with curable internal magnets is shown. The apparatus comprises a magnetic rotor and a rotatably mountable spindle to which the magnetic rotor is attached. A support...
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5243277 |
Cross coil meter
Disclosed herein is a cross coil having a first coil winding for generating a first magnetic field when an electrical current flows therethrough and a second coil winding for generating a second...
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5239259 |
Moving magnet type indicating instrument combined with a counter mechanism
A moving magnet type indicating instrument comprising a moving magnet type instrument, a counter mechanism, a drive unit, and a frame body produced of a synthetic resin. The magnet type indicating...
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5225770 |
Moving magnet galvanometers having a varied density winding distribution coil for a desired performance characteristic
A galvanometer is shown, which includes a cylindrical magnetic rotor polarized into two essentially semi-cylindrical poles on opposite sides of its axis. Two coil portions are disposed on opposite...
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5223791 |
Cross coil type indicating instrument having internally disposed engaging gears
A cross coil type indicating instrument including a coil bobbin having first and second chambers separately formed inside, a rotary shaft to which a magnet rotor and a rotary gear are secured in...
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5146158 |
Externally adjustable stopper plate in a cross-coil type meter
The cross coil type meter has a magnet rotor and a stopper plate inside a coil bobbin. The magnet rotor is driven by a combined magnetic field produced by a cross coil wound on the coil bobbin. A...
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5138968 |
Cross coil-shaped indicating instrument
A cross coil-shaped indicating instrument includes a cross coil structure in which two coils are wound around a coil bobbin at right angles to each other. The coil structure is electrically charged...
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5124643 |
Mounting of a pointer to the rotor of an air core meter
The pointer of an air-core meter instrumentation gauge comprises a driven hub via which the pointer is separably attached to a driving hub on the rotor of the air core meter movement. The driving...
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5095266 |
Cross-coil type indicating instrument
An indicating instrument having a cross coil comprising a pair of mutually perpendicular coils wound on a coil bobbin for passing therethrough current changing with changes in the quantity to be...
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5093615 |
Movement for an instrument having an electromagnetic control arrangement
A movement for instrument is of thin construction. A rotatably supported shaft extends through a thin magnet and supports the magnet on it. The magnet radiates a magnetic field that varies in...
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5061891 |
Cross coil
Disclosed herein is a cross oil having a first coil winding for generating a first magnetic field when an electrical current flows therethrough and a second coil winding for generating a second...
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5062135 |
Cross coil type indicating gauge
An indicating gauge for automobiles for displaying the amount of a measurement on a gauge board by a movement. The movement comprises a pair of coils for generating a combined magnetic field in...
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5046154 |
Encapsulated armature and shaft assembly
An armature and shaft assembly useful in gauges and stepper motors is encapsulated for ease in manufacture and diversity of application, the capsule being suitable for sealing in dampening fluids...
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5012184 |
Adjustment of disposition of rotation axis in moving coil measuring instruments to correct for their non-ideal operation
A moving coil measuring instrument wherein at least one end of the axis (3) of rotation of the moving coil (1) is supported so as to permit adjustment of that end of the axis (3) in a direction...
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5004976 |
Wye winding radial air-core gauge system
A wye-type air-core gauge system provides magnitude indications of measurands in response to PWM signals generated by a control unit that receives electrical signals from a sensor that represents...
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4992726 |
Woven crossed-coil air-core gauge
An air-core gauge containing interwoven cross-coil stator windings that permit interchanging the stator windings of equal radii and still achieve rotor meter movement that coincide directly with...
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4991098 |
Computer-based controller and bipolar PWM driver arrangement for air core gauge control
A control arrangement including a computer-based controller and bipolar driver for bidirectional current control of air core gauge coils by pulse-width-modulation (PWM). The computer-based...
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4928060 |
Driving circuit of a crossed-coil type instrument using digital data pulse production
A driving circuit for driving a crossed-coil type instrument used for reading a physical quantity in which a pair of windings surrounding a movable magnet carrying a pointer needle thereon are...
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