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4767989 |
Mounting arrangement for magnetic field detector
A magnetic field detector has a sensor arrangement which is disposed in a housing and includes a plurality of stripe-magnetic-field-dependent resistors arranged on the underside of a dielectric...
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4757257 |
Magnetoresistive displacement sensor and signal processing circuit
The disclosed device prevents the adverse effect of self-demagnetization from occurring at a continuous long coded part on a code plate arranged to permit detection of an absolute position. A...
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4754221 |
Position detecting apparatus for detecting a signal magnetic field indicative of a desired position
When applying a bias field in the direction of the easy axis of magnetization of a signal field-detecting MR element assembly, a leakage magnetic field of a magnetic recording medium adapted to...
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4734644 |
Flux cancelling yoke type magnetic transducer head
A yoke type magnetic transducer head utilizing a magnetoresistance effect in which a magnetoresistance effect sensing portion is provided so as to magnetically couple a cut-away portion in a...
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4731580 |
Displacement sensing device with two magnetoresistance element sections used independently
A displacement sensing device includes a sensor of magnetoresistance elements located opposite to a magnetic scale, and is adapted to measure a relative amount of movement between the magnetic...
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4727323 |
Magneto-resistive differential sensor system
A differential field plate or magnetically responsive resistors (4a, 4b) is so connected that two field plate resistors are serially connected and the common junction (J) thereof is connected to...
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4725776 |
Magnetic position detector using a thin film magnetoresistor element inclined relative to a moving object
A magnetic detector of the present invention employs magneto-resistive elements and detects magnetic teeth of an object to be detected, and more particularly, a constant DC magnetic field is...
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4713613 |
Device for magnetically detecting displacement of non-magnetic movable member
A device for magnetically detecting displacement, in which the middle points between the magnetic poles N and S of the magnetic signals recorded in different tracks, which are adjacent to each...
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4712064 |
Magnetoresistive sensor for detecting position or speed of a ferromagnetic body
A magnetoresistive sensor used for emitting of electric signals in dependency on the position or the speed of a ferromagnetic body includes magnetoresistive measuring strips (10) on a substrate...
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4707695 |
Magnetic position sensor
In a magnetic detector for receiving a reference position signal in movement from an encoder track and a reference track arranged on a member included in a magnetic position sensor, magnetic...
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4700211 |
Sensitive magnetotransistor magnetic field sensor
A magnetic field sensor having a lateral bipolar magnetotransistor incorporating only a single emitter region and whose base region is incorporated as a well in the surface of a silicon substrate...
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4694248 |
Magnetic field sensor compensated for offset error
A magnetic field sensor includes a magnetic field-sensitive element (1), more specifically a magnetic field-sensitive multi-collector transistor (2). To reduce the offset, the setting of this...
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4686472 |
Magnetic sensor having closely spaced and electrically parallel magnetoresistive layers of different widths
A magnetic sensor for sensing magnetic fields including two flat layers of electrically conductive ferromagnetic material (11, 16) each having an in-plane easy axis of magnetization (EA 1 , EA 2 )...
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4683429 |
Electrical circuit which is linearly responsive to changes in magnetic field intensity
A circuit including a magnetic sensing device for measuring magnetic fields is disclosed. The output of the magnetic sensing device is amplified by an amplifier and feedback to the magnetic sensing...
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4683535 |
Thin film magnetometer
A magnetometer made of thin film ferromagnetic material measures a component of an extraneous magnetic field which lies within the film at right angles to the direction of a magnetic field which is...
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4677377 |
Position-detecting sensor for detecting position of a moving object utilizing magnetism
A position-detecting sensor comprises a magnetic recording medium carried on a moving object and having a signal track recording a magnetic signal, a first MR element disposed nearby the magnetic...
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4677380 |
Magnetic field sensor comprising two component layer transistor of opposite polarities
A magnetic field sensor having two component layer transistors of opposite polarities are cross connected together and give a higher degree of sensitivity, by virtue of that feedback effect. The...
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4673998 |
Magnetic transducer head having series connected magnetroresistance effect sensing element with head output connected between the sensing elements
A magnetic transducer head utilizing magnetoresistance effect having a circuit for applying a constant voltage to outer ends of at least one pair of magnetoresistance effect elements provided in...
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4668913 |
Constant flux magneto resistive magnetic reluctance sensing apparatus
Disclosed is an improved method and apparatus for sensing magnetic reluctance variations. The invention may be used for magnetic ink character reading, such as is employed on bank checks, or for...
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4663588 |
Detector for use for measuring dimensions of an object
A detector head for use in a measuring device includes a plurality of constituent measuring elements arranged in at least two blocks, each block producing an output signal of equal amplitude, and a...
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4663683 |
Magnetoresistive thin film head
In a magnetic head which utilizes the magnetoresistive effect of a ferromagnetic thin film, it is possible to realize a magnetoresistive effect type thin film magnetic head with favorable secondary...
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4660113 |
Magnetoresistive thin film head
A magnetoresistive type thin film magnetic head is completely unaffected by external noise and produces only low interference with a recording medium. A magnetoresistive element which constitutes...
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4649447 |
Combed MR sensor
A magnetic head assembly includes a magnetoresistive (MR) element for reading magnetically recorded information from a record medium. The MR element comprises an elongated member having a...
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4649342 |
Apparatus using inclined sensor for detecting relative displacement
An apparatus for detecting a relative displacement of a magnetic record medium and a magnetic sensor a method for manufacturing the above apparatus are disclosed. A magnetization pattern is...
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4640016 |
Means for indicating direction and a method of determining a direction
A remote indication compass, a sensor of which is formed by a magnetic compass (1) and magnetoresistive sensors (2) attached thereto, by means of which sensors the field created by the magnetic...
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4639806 |
Thin film magnetic head having a magnetized ferromagnetic film on the MR element
A thin film magnetic head for detecting, as a change in electric resistance, a change in signal magnetic field to be applied along the magnetization-hard-axis direction of a metal ferromagnetic...
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4639807 |
Magnetic detector having magnetoresistive elements
A magnetic detector for detecting the angle, position speed of rotation of a rotating body or the rectinear position, distance or speed of a rectinearly moving body is used opposite to a magnetic...
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4617600 |
Magnetic head having a thin strip of magnetoresistive material as a reading element
A magnetic head for reading analogue information on a track of a recording medium associated with the magnetic head. The head has a strip of magnetoresistive material serving as a reading element...
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4616281 |
Displacement detecting apparatus comprising magnetoresistive elements
An apparatus for detecting a displacement of a magnetic sensor including four magnetoresistive elements with respect to a magnetic record medium having a magnetic track on which a magnetization...
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4613918 |
Perpendicular magnetic playback head and a perpendicular magnetic recording and reproducing device
A magneto-resitive playback head and a recording and reproducing device for reproducing a recording signal from a double-layered film type perpendicular magnetic recording medium. The playback head...
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4607271 |
Magnetic field sensor
The magnetic field sensor is composed of a semiconductor magnetic field sensor, for example a magnetotransistor, and at least one NiFe or NiCo film disposed upon its surface. This film functions as...
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4603365 |
Magnetic detection apparatus
A magnetic detection apparatus for use in an encoder includes a first magnetic sensor for detecting an external magnetic field and a second magnetic sensor for detecting a signal magnetic field....
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4599561 |
Device for detecting the relative and absolute position of a moving body
An encoder with a position detecting device is disclosed which is applicable to a brushless motor or the like, and includes a rotating body provided on a surface thereof with a magnetic material...
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4596950 |
Compensated transducer
A compensated measurement transducer for measuring a first current generates a first magnetic field of a predetermined direction which flows in a first circuit including a first conductor; a second...
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4590425 |
Magnetic detector apparatus with excitation conductors connected in series via sensor housing
Magnetic detector apparatus comprises a pair of electrically matched magnetic sensor assemblies supported at opposite ends of a titanium sensor tube of significant length. The sensor tube is...
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4589038 |
Position sensor
A position sensor comprises n tracks (Sp 1 , Sp 2 , Sp 3 ) on a carrier (T) which are provided with magnetizations of a length L and of alternate polarity. The tracks are phase-shifted with respect...
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4589041 |
Differential magnetoresistive sensor for vertical recording
An MR sensor is disclosed in which a pair of thin film magnetoresistive strips are connected electrically in parallel between two terminals. Strips are spaced apart a distance which is small...
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4580175 |
Endless, folded magnetoresistive head
A magnetic read head has a first embodiment comprising an elongated magnetoresistive element having a central region and distant ends. The central region has equipotential strips disposed...
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4568906 |
Sensor having a magnetic field-sensitive element with accurately defined weight and thickness dimensions in the nanometer range
A sensor suitable for measuring magnetic field gradients spanning very small regions has a magnetic field-sensitive element (37, 42) with a very accurately defined height and thickness (even into...
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4566050 |
Skew insensitive magnetic read head
In hand-held magnetic readers, it is desirable that the magnetic read head be able to detect flux transitions on the surface of a magnetic media without requiring that the head have a specific...
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4556925 |
Magnetoresistive head
A magnetoresistive head comprising a magnetoresistive element, to which a magnetic bias field is applied, is disposed opposite to a magnetic recording medium moving relative thereto, and the...
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4535375 |
Magnetoresistive head
A magnetic read head has a first embodiment comprising an elongated magnetoresistive element having a central region and distant ends. The central region has equipotential strips disposed...
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4533872 |
Magnetic field sensor element capable of measuring magnetic field components in two directions
A magnetic field sensor which may be rendered preferentially sensitive to magnetic field components in each of two, preferably orthogonal, directions by application of appropriate magnetic bias...
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4525671 |
Apparatus for sensing two components of a magnetic field
A sensing element suitable for sensing two components h x and h y of an external magnetic field in an orthogonal co-ordinate system comprises a reverse C-shape first electrical conductor vacuum...
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4525668 |
System for measuring electrical output or energy
In an apparatus for the measurement of electrical power, including a multiplier which receives on an input thereof an electrical signal proportional to the voltage component of the electrical...
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4523243 |
Magnetoresistive transducer using an independent recessed electromagnetic bias
An improved magnetoresistive transducer for sensing the magnetic fields recorded on a magnetic medium and suitable for fabrication using photolithographic techniques. The transducer has two...
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4520311 |
Current to pulse-sequence transducer
A current to pulse-sequence transducer for transforming a current to be measured into a sequence of pulses which has a certain mark-to-space ratio, includes a first transforming device for...
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4517515 |
Magnetometer with a solid-state magnetic-field sensing means
A magnetic-field detection device useful as a sensitive magnetometer. The device employs a solid-state field-sensing element which experiences a change in permeability when it is exposed to a...
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4506217 |
Gear tooth position and speed sensor with four, bridge circuit connected, magnetic resistance tracks
To simplify a field plate effect speed and position sensor, particularly for association with the starter gear of an automotive-type internal combustion engine, four meander-arranged permalloy...
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4506220 |
Temperature compensated magnetoresistive effect thin film magnetic sensor
A magnetoresistive effect thin film magnetic sensor has a temperature compensating magnetoresistive effect (MR) element arranged non-parallel to a signal detecting MR element to prevent the...
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