9673 results about "Magnetic circuit" patented technology

A low cost, low profile, small size and high performance inductive device for use in, e.g., electronic circuits. In one exemplary embodiment, the device includes a ferrite core comprising multiple inductors and optimized for electrical and magnetic performance. Improvements in performance are obtained by, inter alia, control of the properties of the gap region(s) as well as placement of the windings relative to the gap. The magnetic path properties of the inductors at the ends of the device are also optionally controllable so as to provide precise matching of inductances. Optionally, the device is also self-leaded, thereby simplifying its installation and mating to a parent device (e.g., PCB). Methods for manufacturing and utilizing the device are also disclosed.

A magnetically activated switch assembly is provided. The magnetically activated switch assembly includes a magnet and a magnetic circuit. The magnetic circuit includes a magnetically activated switch, a first set of flux conductors, and a second set of flux conductors. The first set of flux conductors has first flux conductor flanges adapted to conduct flux from ends of the magnet. The second set of flux conductors is slidingly positioned relative to the first set of flux conductors and is adapted to conduct flux from the first set of flux conductors to the magnetically activated switch. The first set of flux conductors are adapted to rotate clockwise or counter-clockwise and to tilt up or down. The first magnetic circuit is adapted to conduct flux to activate the magnetically activated switch only when the first flux conductor flanges are rotationally aligned with ends of the magnet and tilted to an operational position.

A speaker device includes a magnetic circuit which includes a magnetic gap, a diaphragm which has a recessed part arranged in the magnetic gap and extending in a direction substantially orthogonal with respect to an extending direction of a magnetic flux in the magnetic gap, and a voice coil which is formed into an annular shape and has a first parallel part extending in one direction and a second parallel part extending in a direction in parallel with the first parallel part and opposite to the first parallel part with a constant space. Particularly, the first parallel part and the second parallel part are arranged in a direction in parallel with an extending direction of the recessed part, respectively. The first parallel part is arranged in the recessed part to be positioned in the magnetic gap, and the second parallel part is positioned above the recessed part.

The present invention relates to a serial-to-ethernet modular converter jack and a method of fabricating of the same. The serial-to-ethernet converter electronic components, including the control software stored in on-board memory, are miniaturized and housed entirely in an RJ-45 jack. The present invention is constructed of a shielded housing that defines an open front portion for a connector port. The housing of the present invention also includes a segregated interior chamber, which encases all of the electrical components necessary to complete a serial-to-ethernet conversion of data. Lead pins electrically connected to the circuitry within the interior chamber, protrude from the based of the connector jack providing for a means to mate the jack to a circuit board. First, second and third circuit boards collectively incorporate the serial-to-ethernet circuitry components. Both the first circuit board incorporating magnetic circuitry and the second circuit board incorporating control circuitry are positioned in generally horizontal parallel relation within the interior chamber. The second circuit board which defines opposed sides includes electronic components disposed upon the upper and lower of both sides of said second circuit board. The third circuit board, incorporating connections to the LEDs, is positioned generally perpendicular in relation to the first and second circuit boards and is structurally connected to said first and second circuit boards, additionally providing an electrical connection between the first and second boards. Alternative embodiments of the invention are disclosed and include various arrangement of the serial-to-ethernet circuitry within the interior chamber of the housing.

Magnetic circuit that has (a) a source of magnetic flux which includes an electromagnet or one or more permanent magnets, (b) at least two oppositely polarisable pole extension bodies associated with the magnetic flux source, the bodies being disc, wheel, roller or similarly shaped with an outer circumferential surface and held rotatable about respective axes of rotation, and (c) a ferromagnetic counter body which is arranged to cooperate with the pole extension bodies such as to provide an external flux path for the magnetic flux when in magnetic proximity or contact with the circumferential surface of the pole extension bodies, which is characterised in that the magnetic flux source is held stationary relative to the rotatable pole extension bodies.

The invention relates to a cyclotron which can produce a beam of accelerated charged particles that are intended for the irradiation of at least one target (200). The inventive cyclotron consists of a magnetic circuit which essentially comprises: an electromagnet with at least two poles (1, 1′), namely an upper pole (1) and a lower pole (1′), which are disposed symmetrically in relation to a mid-plane (110) which is perpendicular to the central axis (100) of the cyclotron and which are separated by a gap (120) containing the circulating charged particles and return flux (2) in order to close the aforementioned magnetic circuit; and a pair of main induction coils (5, 5′) which are used to create an essentially-constant main induction field in the gap between poles 1 and 1′. The invention is characterised in that it comprises means of centring the above-mentioned beam, consisting of at least one pair of bucking coils (6, 7) which are supplied by an electrical source (8) and which can modulate the intensity of the main induction field produced by the main coils (5, 5′), in order to increase the intensity of the induction field in a first area of the cyclotron and to reduce the intensity of the induction field in a second area of the cyclotron, which is diametrically opposed to the central axis (100) of the cyclotron.

The vibrator system is for generating bone conduction vibrations. A magnet (8a) provides a static magnetic flux (φ₁) that follows a first path. A bobbin (4a) is disposed at a center a vibrator (2). A housing (10) encloses the bobbin and has a coil surrounding a center of the bobbin. The coil is powered by an alternating current for providing an alternating dynamic magnetic flux (φ₂) following the first path through a magnetic circuit. The housing has an upper end (116). The upper end and the bobbin have a first gap (14a) formed therebetween. The housing has a lower end (118) opposite the upper end. The lower end and the bobbin have a second gap (14b) formed therebetween. The magnet is positioned so that the static magnetic flux (φ₁) is passing through the first and second gaps in a direction substantially parallel with an axial direction (A) of the vibrator. Suspension means (16a, 16b) are provided for suspending the bobbin in a center of the housing.

The present invention provides a low-cost current detection device having a magnetic sensor easily placed on a choke coil, wherein assembly and manufacturing costs are reduced and a product is miniaturized. A current detection device including a choke coil for smoothing an input current or an output current and a magnetic sensor 1a built into the choke coil to detect the input current or output current, wherein the choke coil is composed of: a pair of cores 5 provided with an outer magnetic leg 5a constituting a closed magnetic circuit and a center magnetic leg 5b for providing a gap; and an air core coil 6 mounted on the center magnetic leg 5b, and space 6b is provided to a part of winding of the air core coil 6 with the magnetic sensor 1a placed in the gap between the space 6b and the center magnetic leg 5b.

An electrically isolated combined power and signal coupler is usable for a portable medical monitoring device attachable to a patient in a medical environment. A power coupling system transfers power between a power source and a powered device separated by a physical and electrical isolation barrier. The system comprises a power coupler including in a first device, a first section of a magnetic circuit including a first core section of magnetically permeable material of cross-sectional area substantially larger at an isolation barrier interface than within a first winding located on the first core section. The first section of magnetic circuit being suitable, in a docking mode, for positioning adjacent to a second section of magnetic circuit in a second device to form a completed magnetic circuit used to transfer power between said first and second device. The second section of magnetic circuit including a second core section with a second winding magnetically coupling with the first winding via the completed magnetic circuit in the docking mode for the power transfer. The first core section comprises at least one substantially planar core section at the isolation barrier interface for positioning adjacent to a corresponding substantially planar core section of said second section of magnetic circuit at the isolation barrier interface to form the completed magnetic circuit without a device containing the second section of magnetic circuit enveloping a significant portion of the substantially planar core section.

An electroacoustic transducer comprising a magnetic circuit of a magnetically conductive material with a pair of opposed surfaces defining a gap there between, the magnetic circuit comprising one magnet. The magnet can either be positioned in the center of the magnetically conductive material so as to form two gaps. In an alternative embodiment the magnet is attached to the magnetic conductive material forming only one gap. The transducer further comprises a diaphragm and a coil system having electrically conducting paths fastened to the diaphragm. The coil system has portions of its paths situated in the gap. The transducer may be supplied with an additional diaphragm and coil system positioned on the opposite side of the magnetic circuit. In a preferred embodiment the transducer is rectangular. The transducer is suited for integration into miniature components such as mobile communication equipment and hearing aids. Embodiments of the transducer are suited for side-firing or side-shooting applications such as in mobile phones.

A vibration actuator includes an electromechanical transducer having a magnetic circuit (1-4) and a driving coil (5), a support frame (9), and a damper (270) elastically supporting the magnetic circuit onto the support frame to flexibly damp the vibration of the magnetic circuit when a driving AC current is supplied to the coil (5). The damper (270) comprises inner and outer ring portions (271, 272) and a plurality of spiral spring portions (273) determined by a plurality of spiral slits (274, 275) formed in the damper. In order to reduce the spiral spring portion determined by the adjacent two spiral slits in its compliance, each of the spiral spring portions has an effective spring length determined by an effective angle (theta) which is determined as an angle (by angular degree) from an inner end of the inner spiral slit to an outer end of the outer spiral slit defining each respective spiral spring portion around a center of the damper. The effective angle is 55 angular degree or more. In a preferable example, the effective spring length is determined by a product (r.theta) of an average radius (r) value by the unit of "mm" and the effective angle (theta) value by unit of the angular degree. The effective spring length is selected to 320 or more, and preferably 400 or more.