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1043 results about "Hall effect" patented technology
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The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and to an applied magnetic field perpendicular to the current. It was discovered by Edwin Hall in 1879. For clarity, the original effect is sometimes called the ordinary Hall effect to distinguish it from other "Hall effects" which have different physical mechanisms.
Electro-mechanical surgical device
An electro-mechanical surgical device includes: a housing; an elongated shaft extending from the housing, a distal end of the elongated shaft being detachably coupleable to a surgical instrument; at least two axially rotatable drive shafts disposed within the elongated shaft, a distal end of each of the drive shafts being configured to couple with the surgical instrument; a steering cable arrangement, the steering cable arrangement being configured to steer the distal end of the elongated shaft; and a motor system disposed within the housing, the motor system being configured to drive the drive shafts and the steering cable arrangement. A control system may be provided for controlling the motor system. A remote control unit may also be provided for controlling the motor system via the control system. Sensors, such as optical or Hall-effect devices, may be provided for determining the position of the elements of the surgical instrument based on the detected rotation of the drive shafts. A memory unit stores a plurality of operating programs or algorithms, each corresponding to a type of surgical instrument attachable to the electro-mechanical surgical device. The control system reads or selects from the plurality of operating programs or algorithms, the operating program or algorithm corresponding to the type of surgical instrument attached to the electro-mechanical surgical device.
Owner:DORROS GERALD M D
Electro-mechanical surgical device
Owner:COVIDIEN LP
Electro-mechanical surgical device
An electro-mechanical surgical device includes: a housing; an elongated shaft extending from the housing, a distal end of the elongated shaft being detachably coupleable to a surgical instrument; at least two axially rotatable drive shafts disposed within the elongated shaft, a distal end of each of the drive shafts being configured to couple with the surgical instrument; a steering cable arrangement, the steering cable arrangement being configured to steer the distal end of the elongated shaft; and a motor system disposed within the housing, the motor system being configured to drive the drive shafts and the steering cable arrangement. A control system may be provided for controlling the motor system. A remote control unit may also be provided for controlling the motor system via the control system. Sensors, such as optical or Hall-effect devices, may be provided for determining the position of the elements of the surgical instrument based on the detected rotation of the drive shafts. A memory unit stores a plurality of operating programs or algorithms, each corresponding to a type of surgical instrument attachable to the electro-mechanical surgical device. The control system reads or selects from the plurality of operating programs or algorithms, the operating program or algorithm corresponding to the type of surgical instrument attached to the electro-mechanical surgical device.
Owner:TYCO HEALTHCARE GRP LP
Robotically-controlled end effector
The present invention is directed to a surgical instrument with a robotics system, a memory device and an end effector having an elongate channel, knife position sensor(s) and a firing bar coupled to a knife. In response to drive motions initiated by the robotics system, the firing bar may translate within the elongate channel. As the firing bar translates, the sensor(s) transmit a signal to the memory device. The position of the knife may be determined from the output signals and may be communicated to the robotics system or instrument user. The sensors may be Hall Effect sensors.
Owner:CILAG GMBH INT
Electro-mechanical surgical device
An electro-mechanical surgical device includes: a housing; an elongated shaft extending from the housing, a distal end of the elongated shaft being detachably coupleable to a surgical instrument; at least two axially rotatable drive shafts disposed within the elongated shaft, a distal end of each of the drive shafts being configured to couple with the surgical instrument; a steering cable arrangement, the steering cable arrangement being configured to steer the distal end of the elongated shaft; and a motor system disposed within the housing, the motor system being configured to drive the drive shafts and the steering cable arrangement. A control system may be provided for controlling the motor system. A remote control unit may also be provided for controlling the motor system via the control system. Sensors, such as optical or Hall-effect devices, may be provided for determining the position of the elements of the surgical instrument based on the detected rotation of the drive shafts. A memory unit stores a plurality of operating programs or algorithms, each corresponding to a type of surgical instrument attachable to the electro-mechanical surgical device. The control system reads or selects from the plurality of operating programs or algorithms, the operating program or algorithm corresponding to the type of surgical instrument attached to the electro-mechanical surgical device.
Owner:TYCO HEALTHCARE GRP LP
Hall-effect based linear motor controller
Owner:ALLEGRO MICROSYSTEMS INC
Robotically-controlled end effector
The present invention is directed to a surgical instrument with a robotics system, a memory device and an end effector having an elongate channel, knife position sensor(s) and a firing bar coupled to a knife. In response to drive motions initiated by the robotics system, the firing bar may translate within the elongate channel. As the firing bar translates, the sensor(s) transmit a signal to the memory device. The position of the knife may be determined from the output signals and may be communicated to the robotics system or instrument user. The sensors may be Hall Effect sensors.
Owner:CILAG GMBH INT
Powerhead of a power injection system
InactiveUS20060079765A1Increase powerImprove accuracyMedical devicesIntravenous devicesEngineeringPassword protection
A contrast media injection system includes detects the absolute position of the syringe ram using a non-contact sensor. A series of magnets and Hall-Effect sensors may be used or an opto-reflective system. Illuminated knobs that are connected to the drive mechanism for the syringe ram rotate with the drive and provide visual feedback on operation through the illumination. Analog Hall-Effect sensors are used to determine the presence or absence of magnets that identify the type of faceplate being used. The faceplates include control electronics, connected to the powerhead through connectors, which may be interchangeably used by the two faceplates. The faceplate electronics include detectors for automatically detecting the capacity of pre-filled syringes. Additional features include using historical data to provide optimum pressure limit values during an injection protocol, a removable memory device for storing and transferring information such as injection protocols and injector statistics, and password protection of such protocols.
Owner:LIEBEL FLARSHEIM CO
Integrated sensor
ActiveUS7259545B2Measurement using dc-ac conversionMagnetic measurementsResistive couplingElectrical resistance and conductance
Owner:ALLEGRO MICROSYSTEMS INC
Magnet control system for battery powered living tissue stimulators
A programming system for controlling and / or altering an implantable device's operation using externally applied magnetic means, e.g., a permanent magnet or the like. Typically, such devices stimulate a neural pathway or muscle and / or block pain or muscle stimulation according to programmable settings, e.g., the amplitude, duration, frequency / repetition rates, etc., of stimulation pulses applied to the neural pathways / muscles. Preferably, once programmed from an external programmer, such implantable devices can operate “independently” using the externally provided programmed information. However, external programmers may be unavailable due to cost, size, or other constraints. Accordingly, embodiments of the present invention include a magnetic sensor, preferably a magnetoresistive, Hall effect, saturated core reactors, or the like, to sense an externally provided magnetic field. By externally applying magnetic fields in sequences of controlled polarities, durations, intensities, etc., and sensing these sequences and transitions, the operation of the implantable device may be altered, i.e., programmed.
Owner:ALFRED E MANN FOUND FOR SCI RES
Medical device guide locator
ActiveUS20070049822A1Ultrasonic/sonic/infrasonic diagnosticsSurgical needlesCapacitanceUltrasonic sensor
Systems and methods are shown which provide feedback with respect to the desired or proper placement of a medical device guide without introducing protuberances or other perturbations to the surface of devices used in medical procedures. Embodiments provide a biopsy needle guide bracket for use with an ultrasound transducer assembly, wherein the biopsy needle guide bracket and ultrasound transducer assembly are adapted to detect when the biopsy needle guide bracket is properly located on the ultrasound transducer assembly using one or more sensors. Embodiments may implement various sensor technology, such as Hall effect sensors, optical sensors, capacitive coupled sensors, inductive coupled sensors, and / or the like to provide feedback with respect to placement of a medical device guide.
Owner:FUJIFILM SONOSITE
Delivery device for localized delivery of a therapeutic agent
InactiveUS20110137155A1Receive treatment wellImprove usabilityStentsBalloon catheterLesionBlood vessel
Therapeutic agent delivery devices and methods for delivering a therapeutic agent to a target location as well as methods for determining the location of a lesion on a vessel wall are disclosed. Various embodiments disclose an expandable member comprising a drug delivery matrix for selectively delivering a therapeutic agent to a lesion on a vessel wall. The drug delivery matrix may comprise one or more sensors and an electroactive polymer for releasing the therapeutic agent. Other embodiments disclose an expandable member comprising a plurality of radially-expanding flexible walls forming a plurality of channels for selectively delivering therapeutic agent to a target area adjacent one or more of the channels. Detecting a lesion may comprise using a plurality of Hall effect sensors disposed on a distal end of a catheter.
Owner:BOSTON SCI SCIMED INC
Magnetic Manual User Interface Devices
InactiveUS20100265176A1Manual control with multiple controlled membersLimiting/preventing/returning movement of partsElectrical polarityPersonal computer
Various finger tip controlled manual interface devices that can be used as inputs to personal computers, electromechanical systems and video game consoles utilize concentrically arranged magnets. The polarities of the magnets are oriented to provide restoration forces on a one of the magnets to bias it toward a neutral position. A magnetic sensor including a plurality of sensing elements such as Hall effect devices generates output signals representative of direction and amount of movement of the magnet that is biased to the neutral position.
Owner:SEEKTECH
Chopper-stabilized amplifier and magnetic field sensor
ActiveUS7605647B1Reduced offset componentIncrease the switching frequencyGalvano-magnetic amplifiersMagnetic measurementsAudio power amplifierLow-pass filter
A chopper-stabilized amplifier has switching networks arranged to support a high frequency clocking signal and to provide a high common mode rejection and a high rejection of an offset component of an input signal. A magnetic field sensor includes a Hall effect element coupled to a modulation circuit. The modulation circuit provides a signal to the chopper-stabilized amplifier. The chopper-stabilized amplifier provides an output signal to a low pass filter, which provides an output signal from the magnetic field sensor.
Owner:ALLEGRO MICROSYSTEMS INC
Hall effect seat switch
A Hall effect safety switch assembly for de-activating a motor vehicle if a user is not positioned on a vehicle seat. The assembly includes a switch frame for mounting the assembly, a magnet and a hall effect sensor mounted to the switch frame in a spaced apart relationship, and a vane that moves in response to the presence of a vehicle operator on the seat that causes the Hall effect sensor to provide an inhibit signal that prevents an engine from running.
Owner:DELTA SYST
Electric saw communication
ActiveUS20110056716A1Easy to handleEasy to adjust the positionSynchronous motors startersAC motor controlMulticore cablePermanent magnet motor
The present invention relates to an electric saw (1) being powered by an external power supply (200) through a multicore cable (6). The multicore cable (6) includes electrical wires (24, 25, 27) for supplying power to the motors (5, 12, 13) of the electric saw (1) and communication wires (26) for data communication between the electric saw (1) and the power supply (200). Two motors (12, 13) of the electric saw are three phase permanent magnet motors (12, 13), with an outer rotor (31) and an inner stator (30). Each of the two motors (12, 13) has three Hall Effect sensors (H1, H2, H3) located around the outer rotor (31).
Owner:HUSQVARNA AB
Paintball gun monitor
The invention and disclosure is directed to improvements for a pressure gun utilized to propel paint containing balls which will, when they strike, break and apply paint to a target or, as utilized in the sport of Paint or Splat Ball, an opposing player, to identify such person as having been hit and therefore out of the game. The improvements include both a retro-fit and a custom adapted monitor with visual readout for counting the number of balls which have been shot by sensing pressure drop, or through Hall effect sensing, or mechanical switch actuation; the latter two sensing propelling bolt movement. The monitor also includes a visual readout for reverse timing to show the player game time remaining and a tank pressure supply readout which will show the player remaining tank pressure. Through microprocessing of the information of shot count and time remaining or elapsed, a shooting rate is determinable. Both the retro-fit unit and the custom unit supply the same basic information to the microprocessor which then will calculate shot rate.
Owner:SEEFELDT WILLIAM J +1
Pulsed magnetic control system for interlocking functions of battery powered living tissue stimulators
A magnetic control system for selectively enabling / disabling an implantable device's operation using externally applied pulsed magnetic means, e.g., a controlled electromagnet or the like. Typically, such implantable devices stimulate a neural pathway or muscle and / or block pain or muscle stimulation according to programmable settings. Preferably, once programmed from an external programmer, such implantable devices can operate “independently” using the externally provided programmed information. However, in certain circumstances, it may be desired to stop / pause the operation of such selected implanted device while not affecting other such devices. Accordingly, embodiments of the present invention include a magnetic sensor, preferably a magnetoresistive, Hall effect, saturated core reactors, or the like, to sense an externally provided magnetic field. By externally applying pulsed magnetic fields in sequences of controlled polarities, durations, intensities, etc., and sensing these identifiable sequences and transitions, the operation of the implantable device may be enabled / disabled.
Owner:ALFRED E MANN FOUND FOR SCI RES
Electro-mechanical surgical device
An electro-mechanical surgical device includes: a housing; an elongated shaft extending from the housing, a distal end of the elongated shaft being detachably coupleable to a surgical instrument; at least two axially rotatable drive shafts disposed within the elongated shaft, a distal end of each of the drive shafts being configured to couple with the surgical instrument; a steering cable arrangement, the steering cable arrangement being configured to steer the distal end of the elongated shaft; and a motor system disposed within the housing, the motor system being configured to drive the drive shafts and the steering cable arrangement. A control system may be provided for controlling the motor system. A remote control unit may also be provided for controlling the motor system via the control system. Sensors, such as optical of Hall-effect devices, may be provided for determining the position of the elements of the surgical instrument based on the detected rotation of the drive shafts. A memory unit stores a plurality of operating programs or algorithms, each corresponding to a type of surgical instrument attachable to the electro-mechanical surgical device. The control system reads or selects from the plurality of operating programs or algorithms, the operating program or algorithm corresponding to the type of surgical instrument attached to the electro-mechanical surgical device.
Owner:TYCO HEALTHCARE GRP LP
Sensors and methods and apparatus relating to same
InactiveUS20110110794A1Easy to assembleReduce assemblyPositive displacement pump componentsFlexible member pumpsCurrent sensorElectrical connection
In one form a capacitive sensor is disclosed for immersion into a fluid, the capacitive sensor having a housing and first and second electrodes with the first electrode being disposed at least partially within the housing and electrically connected to a circuit, the second electrode being electrically connected to the circuit via an electrical connection and physically separated from the housing containing at least a portion of the first electrode so that at least a portion of the electrical connection or second electrode is located above or outside of the fluid to reduce the risk that minerals will form between the electrodes. In another form the electrodes are separated into their own cavities of the sensor housing via a bridging member which separates the electrodes to help reduce the risk of mineral buildup occurring between the electrodes. In other forms, capacitors, capacitive sensors, pump controls and systems utilizing these features are disclosed along with methods and apparatus relating to same. In yet other forms additional sensors such as current sensors, thermal sensors, speed sensors, torque sensors and Hall Effect sensors are disclosed for use alone or in combination with said capacitive sensor for detecting fluid level and / or controlling pumps. In still other forms, apparatus and methods relating to self cleaning pumps are disclosed.
Owner:MAYLEBEN PHILIP +2
Hall-effect current detector
InactiveUS6841989B2Reduce electrostatic noiseNoise shielding can be effectivelySolid-state devicesMagnetic field measurement using galvano-magnetic devicesElectricityElectrical conductor
A current detector comprising a current-path conductor assembly and a Hall generator assembly. The current-path conductor assembly includes a sheet-metal current-path conductor and a plastic conductor holder molded in one piece therewith. The Hall generator assembly includes a Hall generator in the form of a semiconductor chip mounted to a metal-made mounting plate, a set of leads electrically connected to the Hall generator, and a plastic encapsulation enveloping the Hall generator and parts of the leads. The Hall generator assembly and the current-path conductor assembly are combined by bonding together the encapsulation of the Hall generator assembly and the conductor holder of the current-path conductor assembly. The conductor holder and the encapsulation are shaped in interfitting relationship to each other, so that when they are united, the Hall generator is positioned to generate a Hall voltage in response to a magnetic field due to the current flowing through the current-path conductor.
Owner:SANKEN ELECTRIC CO LTD
Wireless integrated occupancy sensor
Owner:TAK AB
Non-contact system for detecting an angle of rotation
InactiveUS6212783B1Angles/taper measurementsElectric ignition installationAngular orientationInternal combustion engine
The arrangement for contactless determination of an angular position of a rotatable element, such as a camshaft of an internal combustion engine, which includes a magnet arranged to rotate with the rotatable element; a magnetic field sensor stationary in relation to the rotatable element and including a first sensor element (IC1) and a second sensor element (IC2), wherein the first sensor element generates a first output signal linearly dependent on an angle between the magnetic field and the magnetic field sensor according to a magnetoresistive effect, whereby the first output signal has respective values between 0° and 180° that repeat between 180° and 360°, and the second sensor element generates a second output signal having a high value between 0° and 180° and a low value between 180° and 360° according to a Hall effect; and an evaluation circuit (A) for analyzing output signals of both sensor elements to determine the angular position of the rotatable element between 0° and 360°. The evaluating circuit finds that the absolute angular position is either of two angular orientations spaced 180° from each other only from the signal from the first sensor element and selects one of them as the absolute angular position according to the second output signal.
Owner:ROBERT BOSCH GMBH
Device and method for non-invasive, localized neural stimulation utilizing hall effect phenomenon
InactiveUS7699768B2Reduce dosageReduce or eliminate intraoperative brain mappingUltrasound therapyElectrotherapyMedicineRadiology
Owner:KISHAWI EYAD +1
Device and Method for Non-Invasive, Localized Neural Stimulation Utilizing Hall Effect Phenomenon
InactiveUS20070255085A1Increase stimulationReduce dosageUltrasound therapyElectrotherapyMedicineElectrical polarity
One aspect of the invention provides a method of stimulating a nerve in tissue of a patient. The method includes the following steps: applying a focused ultrasound beam to the tissue; applying a first magnetic field to the tissue; and applying a second magnetic field to the tissue, the ultrasound beam and the first and second magnetic fields combining to stimulate the nerve. Another aspect of the invention provides a nerve stimulation device having two magnetic coils of opposite polarity each adapted to generate a magnetic field in a patient's tissue, the coils being positioned to generate a substantially toroidal magnetic field within the patient's tissue; and an ultrasound source adapted to transmit a focused ultrasound beam into the patient's tissue.
Owner:KISHAWI EYAD +1
Electronic device with ring-connected hall effect regions
ActiveUS20130021026A1Force measurement by measuring magnetic property varationMagnetic field measurement using galvano-magnetic devicesElectronPhysics
An electronic device includes a number of n Hall effect regions with n>1, wherein the n Hall effect regions are isolated from each other. The electronic device also includes at least eight contacts in or on surfaces of the n Hall effect regions, wherein the contacts include: a first and a second contact of each Hall effect region. A first contact of the (k+1)-th Hall effect region is connected to the second contact of the k-th Hall effect region for k=1 to n−1, and the first contact of the first Hall effect region is connected to the second contact of the n-th Hall effect region. The at least eight contacts include at least two supply contacts and at least two sense contacts. Each Hall effect region includes at most one of the at least two supply contacts and at most one of the at least two sense contacts.
Owner:INFINEON TECH AG
Micromachined magnetic field sensors
ActiveUS20120007598A1Improve sensor sensitivityReduce sensor offsetSolid-state devicesMagnetic field measurement using galvano-magnetic devicesElectricityMagnetic flux
A micromachined magnetic field sensor integrated with electronics is disclosed. The magnetic field sensors utilize Hall-effect sensing mechanisms to achieve 3-axis sensing. A Z axis sensor can be fabricated either on a device layer or on a conventional IC substrate with the design of conventional horizontal Hall plates. An X and Y axis sensor are constructed on the device layer. In some embodiments, a magnetic flux concentrator is applied to enhance the performance of the magnetic field sensor. In some embodiments, the magnetic field sensors are placed on slope sidewalls to achieve 3-axis magnetic sensing system. In some embodiments, a stress isolation structure is incorporated to lower the sensor offset. The conventional IC substrate and device layer are connected electrically to form a 3-axis magnetic sensing system. The magnetic field sensor can also be integrated with motion sensors that are constructed in the similar technology.
Owner:INVENSENSE
Current measuring device
ActiveUS20100237853A1Base element modificationsVoltage/current isolationElectrical conductorCurrent sensor
A current sensor is provided for non-invasively measuring electrical current in an electrical conductor. The current sensor includes a housing having a Hall effect device and circuitry for transmitting a signal indicative of the current flowing through the electrical conductor. The current sensor includes a base having a surface for supporting an electrical conductor. A magnetic shielding member is coupled to the surface to shield the Hall effect device from stray or external magnetic fields. A compliant member is coupled to the magnetic shielding member opposite the surface. The compliant member compresses to allow the current sensor to accommodate a large variety of electrical conductor sizes. The compliant member further acts to bias the electrical conductor against the Hall effect device.
Owner:CONSOL EDISON OF NEW YORK +1
Three Terminal Spin Orbit Torque Memory Cell with In-Stack MAGNETIC LAYER THAT PROVIDES Magnetic Bias Field AND SPIN ORBIT TORQUE VIA Anomalous Hall Effect
ActiveUS20170125078A1Remarkable effectMagnetic-field-controlled resistorsSolid-state devicesSpin orbit torqueBias field
A method and apparatus for deterministically switching a free layer in a spin orbit torque magnetoresistive random access memory (SOT-MRAM) cell is disclosed herein. In one embodiment, an SOT-MRAM memory cell is provided. The SOT-MRAM memory cell includes a magnetic tunnel junction, a ferromagnetic bias layer, and an antiferromagnetic layer. The magnetic tunnel junction includes a free layer having primarily two bi-stable magnetization directions, a reference layer having a fixed magnetization direction, and an insulating tunnel barrier layer positioned between the free layer and the reference layer. The ferromagnetic bias layer is configured to provide spin orbit torque via anomalous Hall effect and simultaneously configured to provide a magnetic bias field on the free layer to achieve deterministic switching. The antiferromagnetic layer is positioned below the ferromagnetic bias layer and is configured to pin a magnetization direction of the ferromagnetic bias layer in a predetermined direction.
Owner:WESTERN DIGITAL TECH INC
Combined radio frequency and hall effect ion source and plasma accelerator system
ActiveUS20060284562A1Improve efficiencyEliminate needLaser detailsMaterial analysis by optical meansTransverse magnetic fieldElectrical impedance
This invention features a combined radio frequency (RF) and Hall Effect ion source and plasma accelerator system including a plasma accelerator having an anode and a discharge zone, the plasma accelerator for providing plasma discharge. A gas distributor introduces a gas into the plasma accelerator. A cathode emits electrons attracted to the anode for ionizing the gas and neutralizing ion flux emitted from the plasma accelerator. An electrical circuit coupled between the anode and the cathode having a DC power source provides DC voltage. A magnetic circuit structure including a magnetic field source establishes a transverse magnetic field in the plasma accelerator that creates an impedance to the flow of the electrons toward the anode to enhance ionization of the gas to create plasma and which in combination with the electric circuit establishes an axial electric field in the plasma accelerator. An RF power source provides RF power to at least one electrode disposed about and / or inside the plasma accelerator that induces current for ionizing the gas to create the plasma such that the axial electric field accelerates ions through the plasma accelerator to provide ion flux.
Owner:BUSEK
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