6817 results about "Electromagnetic coil" patented technology

Using the linear forces that are provided by an electromagnetic solenoid applied near the distal end of a medical catheter, various surgical instruments can be actuated or deployed for use in interventional medicine. The linear actuator uses the principles of magnetic repulsion and attraction as a means for moving a bobbin that can be attached to various types of moving components that translate linear movements into the actuation of a tool that is attached to the linear actuator. Using independent solenoid coils, movement modality is increased from two possible positions to three.

A simulation tail swinging installment includes a base plate, an electromagnetic coil disposed on the base plate, a battery module configured for supplying power to the electromagnetic coil, and a control circuit coupled to the battery module. The simulation tail swinging installment further includes a furcated component having two arms disposed with respect to the electromagnetic coil, with the two arms located on opposite sides of the electromagnetic coil, respectively. Each of the arms includes a permanent magnet positioned in correspondence with the electromagnetic coil. The furcated component is mounted to the base plate through a pivot connected to the base plate. A first driving cable and a second driving cable are attached to the two arms, respectively. The first driving cable and the second driving cable extend through and along two side portions of a simulation tail and secured to a distal end of the simulation tail.

A scan element includes a bobbin having a central axis about which is wound an electromagnetic wire coil and having a flange oriented generally transverse to the central axis. At least one elastomeric support has a first end coupled to the flange. A permanent magnet has first and second surfaces, a central axis, and a magnetization direction oriented generally transverse to the central axis of the permanent magnet. The magnet is supported by a second end of the elastomeric support. A mirror has a central axis and is mounted on the second surface of the magnet. The central axes of the mirror and magnet are coaxial with the central axis of the bobbin. The elastomeric support provides a return force when the magnet and the mirror are rotated at an angle from the central axis during energization of the electromagnetic wire coil.

A laser scanning assembly for use in a host system, including a mirror support element and a permanent magnetic element supported on a flexural element made from flexible material being supported by a pair of shaft half sections forming a stationary shaft, about which an axis of rotation is formed. The mirror support element and the permanent magnetic element have first and second recesses which accommodate the width of the stationary shaft so that a mirror and permanent magnet subassembly, formed by the mirror support element and the magnetic element, is free to oscillate about the stationary shaft when an electromagnetic coil is driven by a drive circuit and generates magnetic forces that act on the permanent magnetic element.

A simulation tail swinging installment includes a base plate, an electromagnetic coil disposed on the base plate, a battery module configured for supplying power to the electromagnetic coil, and a control circuit coupled to the battery module. The simulation tail swinging installment further includes a furcated component having two arms disposed with respect to the electromagnetic coil, with the two arms located on opposite sides of the electromagnetic coil, respectively. Each of the arms includes a permanent magnet positioned in correspondence with the electromagnetic coil. The furcated component is mounted to the base plate through a pivot connected to the base plate. A first driving cable and a second driving cable are attached to the two arms, respectively. The first driving cable and the second driving cable extend through and along two side portions of a simulation tail and secured to a distal end of the simulation tail.

Line locator systems that fuse traditional sensors used in a combined pipe and cable locator (electromagnetic coils, magnetometers, and ground penetrating radar antennas) with low cost inertial sensors (accelerometers, gyroscopes) in a model-based approach are presented. Such systems can utilize inexpensive MEMS sensors for inertial navigation. A pseudo-inertial frame is defined that uses the centerline of the tracked utility, or an aboveground fixed object as the navigational reference. An inertial sensor correction mechanism that limits the tracking errors over time when the model is implemented in state-space form using, for example, the Extended Kalman Filter (EKF) is disclosed.

Laser scanning module employing a scan mirror and magnet rotor subassembly supported by a stationary stator structure. The scan mirror and magnet rotor subassembly includes: a silicone frame having a pair of silicone torsional hinges (i.e. posts) aligned along a scan axis and a supported by a pair of support elements associated with the stator structure, to support the scan mirror and magnet rotor subassembly. When the scan mirror and magnet rotor subassembly is rotated about its scan axis, by forces generated by an electromagnetic coil structure acting on the permanent magnet mounted on silicone frame, the silicone torsional hinges are elastically distorted and generate linear restoring forces which return the rotor subassembly back to its home position about the scan axis.

An apparatus for monitoring speaker cone displacement in an audio speaker includes: (a) an electromagnetic coil structure; (b) a ferrous core structure; the ferrous core structure and the electromagnetic coil structure being mounted with the speaker to effect variable electromagnetic coupling between the ferrous core structure and the electromagnetic coil structure as the speaker cone moves; (c) a signal injecting circuit coupled with the electromagnetic coil structure for injecting a predetermined input signal into the electromagnetic coil structure; and (d) a signal monitoring circuit coupled with the electromagnetic coil structure; the signal monitoring circuit receiving an output signal from the electromagnetic coil structure and generating an indicating signal based upon the output signal; at least one signal characteristic of the indicating signal being related with the cone displacement.

A haptic feedback system comprises a moveable device with at least three degrees of freedom in an operating space. A display device is operative to present a dynamic virtual environment. A controller is operative to generate display signals to the display device for presentation of a dynamic virtual environment corresponding to the operating space, including an icon corresponding to the position of the moveable device in the virtual environment. An actuator of the haptic feedback system comprises a stator having an array of independently controllable electromagnet coils. By selectively energizing at least a subset of the electromagnetic coils, the stator generates a net magnetic force on the moveable device in the operating space. In certain exemplary embodiments the actuator has a controllably moveable stage positioning the stator in response to movement of the moveable device, resulting in a larger operating area. A detector of the system, optionally multiple sensors of different types, is operative to detect at least the position of the moveable device in the operating space and to generate corresponding detection signals to the controller. The controller receives and processes detection signals from the detection sensor and generates corresponding control signals to the actuator to control the net magnetic force on the moveable device.

A control rod drive mechanism (CRDM) for use in a nuclear reactor, the CRDM comprising: a connecting rod connected with at least one control rod; a lead screw; a drive mechanism configured to linearly translate the lead screw; an electromagnet coil assembly; and a latching assembly that latches the connecting rod to the lead screw responsive to energizing the electromagnet coil assembly and unlatches the connecting rod from the lead screw responsive to deenergizing the electromagnet coil assembly. The latching assembly is secured with and linearly translates with the lead screw, while the electromagnet coil assembly does not move with the lead screw. The electromagnet coil assembly is at least coextensive with a linear translation stroke over which the drive mechanism is configured to linearly translate the lead screw.

A cold-cathode ion source with a closed-loop ion-emitting slit which is provided with means for generating a cyclically-variable, e.g., alternating or pulsating electric or magnetic field in an anode-cathode space. These means may be made in the form of an alternating-voltage generator which generates alternating voltage on one of the cathode parts that form the ion-emitting slit, whereas the other slit-forming part is grounded. The alternating voltage deviates the ion beam in the slit with the same frequency of the alternating voltage. In accordance with another embodiment, the aforementioned means may be an electromagnetic coil which generates a magnetic field which passes through the ion-emitting slit, thus acting on the condition of the spatial-charge formation and, hence, on concentration of ions in the ion beam. The cold-cathode ion source may be of any type, i.e., with the ion beam emitted in the direction perpendicular to the direction of drift of electrons in the ion-emitting slit or with the direction of emission of the beam which coincides with the direction of electron drift.

A handheld gaming machine including one or more actuators for providing vibrational cues or feedback during play of a wagering game to indicate the occurrence of a wagering-game event, such as a change in game rules, an input of a wager, and the like. The change in game rules may include a change in the odds of winning an award during the wagering game, a change in the type of award that can be awarded during the wagering game, eligibility for bonus play, or eligibility to accumulate one or more game elements associated with the wagering game. The vibration can be consistent with a wagering-game theme and can accompany or be a substitute for concurrently played audio sounds. The actuator(s) may include a haptic device such as a haptic touchscreen that overlays the display or an electromagnetic coil acting upon an unbalanced mass.

Line locator systems that fuse traditional sensors used in a combined pipe and cable locator (electromagnetic coils, magnetometers, and ground penetrating radar antennas) with low cost inertial sensors (accelerometers, gyroscopes) in a model-based approach are presented. Such systems can utilize inexpensive MEMS sensors for inertial navigation. A pseudo-inertial frame is defined that uses the centerline of the tracked utility, or an aboveground fixed object as the navigational reference. An inertial sensor correction mechanism that limits the tracking errors over time when the model is implemented in state-space form using, for example, the Extended Kalman Filter (EKF) is disclosed.

An elongate medical device includes a sensor configured to detect one or more characteristics of an electromagnetic field in which the device is disposed. The sensor includes an electrically-insulative substrate, rectangular in shape, and a patterned, conductive trace disposed on the substrate. The patterned trace includes a plurality of diagonal sections parallel to one another, arranged with a relatively low pitch. The substrate is wrapped into a cylindrical shape thereby forming a three-dimensional spiral capable of functioning as a micro-electromagnetic sensor. A medical positioning system is responsive to the signal from the sensor to determine a position and / or orientation of the sensor.

A handheld gaming machine including one or more actuators for providing vibrational cues or feedback during play of a wagering game to indicate the occurrence of a wagering-game event, such as a change in game rules, an input of a wager, and the like. The change in game rules may include a change in the odds of winning an award during the wagering game, a change in the type of award that can be awarded during the wagering game, eligibility for bonus play, or eligibility to accumulate one or more game elements associated with the wagering game. The vibration can be consistent with a wagering-game theme and can accompany or be a substitute for concurrently played audio sounds. The actuator(s) may include a haptic device such as a haptic touchscreen that overlays the display or an electromagnetic coil acting upon an unbalanced mass.

The invention relates to apparatus and method for ultrasonically and electromagnetically treating tissue to treat, for example, traumatized tissue or a bone injury. The apparatus includes at least one ultrasonic transducer assembly and at least one electromagnetic coil-assembly configured to cooperate with a placement module for placement in proximity to the treatment area. The apparatus also utilizes a portable main operating unit constructed to fit within a pouch or carrying case worn by the patient. In operation, at least one ultrasonic transducer and at least one electromagnetic coil are activated by transmitting control signals to the placement module from the main operating unit. The activation of the at least one ultrasonic transducer causes ultrasonic waves to be propagated toward the treatment area which are modulated by electrostatic and magnetic forces generated by the at least one electromagnetic coil. The activation of the at least one ultrasonic transducer and the at least one electromagnetic coil may be performed at the same time or at different times for varying periods.

The invention discloses an electric cooker comprising a double-layer boiler body with a handle and an electromagnetic oven body, wherein the boiler body comprises a first temperature sensor, a first temperature measuring circuit, a wireless signal transmitting circuit and a direct-current power supply, and the electromagnetic oven body comprises a wireless signal receiving circuit, a temperature control circuit, a drive circuit, an electromagnetic coil and a power circuit. The invention adopts the technical scheme that the temperature sensor is arranged on the boiler body, the temperature control circuit receives temperature signals on the boiler body and controls the output power of the drive circuit according to the temperature signals of the boiler body so as to control the heating temperature of an electromagnetic oven, and then the precise temperature control on heated foods can be realized. In addition, the electromagnetic oven body also comprises a second temperature sensor and a second temperature measuring circuit; and the temperature control circuit can also receives the temperature signals of the electromagnetic oven body and controls the output power of the drive circuit according to the temperature signals of the electromagnetic oven body, thereby realizing the control on the heating temperature of the electromagnetic oven.

A method for determining the location of an underground sonde transmitter is disclosed. In some embodiments, the method includes measuring a set of complex electromagnetic field magnitude and phase strengths at one or more of positions while traversing a target sonde path at any angle using one or more electromagnetic coil sensors, modeling a set of expected complex electromagnetic strengths of a hypothetical sonde at the one or more of positions for one or more of the electromagnetic coil sensors, the set of expected electromagnetic field values corresponding to a model for the target sonde, and estimating parameters related to the target sonde based on the residual error between the measured set of complex electromagnetic field values and the modeled set of expected complex electromagnetic field strengths, wherein a final estimated parameter set is determined after the residual error has converged to a minimum tolerance.

A suppression and protection circuit is used in conjunction with a circuit interrupter. In one configuration, a voltage clamping device such as a metal oxide varistor is utilized in a ground fault circuit interrupter product for handling transient surges and overvoltage conditions and is placed in series with a solenoid coil. The suppression and protection circuit includes a crowbar device across the line such as a header spark gap to prevent overvoltages, and a low pass filter such as an LC filter for suppressing transient surges.

A thin-film magnetic head for a heat-assisted magnetic recording which can perform a reliable writing immediately only on a desired track by applying a near-field light to a desired position and range is provided. The head comprises: an electromagnetic coil element for writing data signals, having a pole end reaching a head end surface; and a near-field-light-generating portion for heating a portion of a magnetic recording medium during write operation by generating a near-field light, having a generation end reaching the head end surface and provided adjacent to the pole end and in the leading side of the pole end, and a shape of the generation end on the head end surface being a trapezoid with a shorter edge on the trailing side, or being a triangle with an apex on the trailing side and with a bottom on the leading side.

A fuel injector (1) for fuel injection systems of internal combustion engines is specially designed for the direct injection of fuel into the combustion chamber of an internal combustion engine. It is provided with a solenoid coil (10), a two-part armature (20a, 20b) that is acted upon through the solenoid coil (10) in a closing direction by a first resetting spring (23a), and a valve needle (3) that is connected to the larger armature part (20a) in a force-locking manner, for actuating a valve-closure member (4) which together with a valve seat surface (6) forms a sealing seat. The first armature part (20a) is acted upon in the closing direction by the first resetting spring (23a), and the second armature part (20b) is acted upon in the closing direction by the second resetting spring (23b), the spring constants of the resetting springs (23a, 23b) being different.

A magneto-rheological ("MR") damper having a damper body tube containing an MR fluid. A piston assembly is disposed in the damper body tube and forms an annular flow gap between the piston assembly and the damper body tube. The piston assembly has a piston core containing ferrous material and an electromagnetic coil mounted on the piston core for generating a magnetic field. The damper further includes a ferromagnetic member positioned outside of the damper body tube substantially adjacent the piston assembly for providing at least a part of a magnetic flux return path for the magnetic field.

A magnetic induction charged candle includes candle, holder and charger. Said candle and holder are equipped with printed circuit board (PCB), integrated circuit (IC), light emitting diode (LED), battery, switch, and terminal respectively. In that, the terminals can be coupled with each other. Thereby, the candle can be combined and mounted to the holder. At the bottom end of the holder has an electromagnetic coil corresponding to an electromagnetic coil inside the charger. When the holder is place into the charger, an electromotive force is produced between the two electromagnetic coils to induce currents. Thereby, the candle and the holder can be charged at the same time. Even the candle and the holder are not equipped with power line, they can be charged with full capacity of electricity. Moreover, the chargers can be in connection with one another in-line to expand the charging capacity.

A system for monitoring flow conditions of fluid flowing from a product container through a solenoid pump. The system includes at least one solenoid pump comprising a solenoid coil, which, when energized, produces a stroke of the solenoid pump, at least one product container connected to the at least one solenoid pump wherein the at least one solenoid pump pumps fluid from the at least one product container during each stroke, at least one PWM controller configured to energize the at least one solenoid pump, at least one current sensor for sensing the current flow through the solenoid coil and producing an output of the sensed current flow, and a control logic subsystem for controlling the flow of fluids through the solenoid pump by commanding the PWM controller and for monitoring the current through the solenoid pump by receiving the output from the current sensor, wherein the control logic subsystem uses the measured current flow through the solenoid coil to determine whether the stroke of the solenoid pump is functional.

The invention presents methods and systems for accessing a pericardial space and preventing strokes arising from a left atrial appendage (“LAA”) by achieving a complete occlusion of the LAA using an epicardial approach without creating a puckering of the LAA ostium. A complete occlusion of the LAA is desired because bleeding arising from the LAA often leads to embolic strokes. Due to the peculiar anatomy of the LAA ostium, traditional LAA ligation techniques using sutures can lead to puckering, thus compromising the occlusion of the LAA. The invention achieves a complete occlusion and a more effective hemostatic seal with the use of inflatable balloons having electromagnetic coils internally, as well as hydrogels, sponges, and caliber tubes attached to the respective balloon's exterior, anchoring balloons, a closure device having a suture looped through two semi-rigid hollow tube that can be coated with hydrogel or silicone, and locking mechanisms.

A vehicle stowage assembly is provided that includes a compartment having an opening to allow access to the opening and a door proximate the opening. A ferrous member magnets are disposed on the compartment and the door to magnetically couple the magnets to the ferrous member when the door is in the closed position. A crash sensor is provided for detecting an expected vehicle crash event. An electromagnetic coil electromagnetically is coupled to the ferrous member, wherein the coil is electrically energized by current to create a polarity on the ferrous bar to create an increased force closure to the door relative to the housing when an expected vehicle crash is detected. The coil generates an opposite polarity on the ferrous member to open the door in response to a user actuated input.