An electronic device comprising a first portion and a second portion pivotably connected to each other is disclosed. The electronic device is pivotable between a closed position and an open position. The device comprises a magnetically attractable arrangement within or on the second portion and a magnetic arrangement comprising a magnet having a magnetic field and a magnetic shielding element disposed within or on the first portion. At least one of the magnet or the magnetic shielding element is configured to move translationally with respect to the other between a shielded position and an engaging position when the first portion is pivoted with respect to the second portion. In the shielded position, the magnetic shielding element at least partially reduces a portion of the magnetic field extending outside of the first portion. In the engaging position, the magnet engages the magnetically attractable arrangement.

Loudspeaker unit with a membrane (2) and a plurality of drive units (5) driving the membrane (2). Each of the plurality of drive units (5) has n voice coils (3) and at least n+1 magnets (4), n being an integer larger than or equal to 1. The magnets (4) have an axial magnetization and are stacked in axial direction with similar pole parts of adjacent ones of the at least n+1 magnets facing each other. The at least n+1 magnets (4) are separated in the stack over a magnet separation distance (d.sub.m), the magnet separation distance (d.sub.m) being substantially equal to a width (w.sub.s) in the stack direction of the at least n voice coils (3).

The invention relates to methods of trapping a pest, said method comprising providing ferromagnetic particles for ingestion by the pest, and trapping the pest using one or more magnets, wherein a trapped pest has ingested and internally accumulated an amount of the ferromagnetic particles sufficient to permit immobilization of the pest using said one or more magnets. Devices for use with the methods of the instant invention are also disclosed.

A cochlear implant including a cochlear lead, an antenna, a stimulation processor, and a magnet apparatus, associated with the antenna, including a case defining a central axis, a magnet frame within the case and rotatable about the central axis of the case, and a plurality of elongate diametrically magnetized magnets that are located in the magnet frame, the magnets defining a longitudinal axis and a N-S direction and being freely rotatable about the longitudinal axis relative to the magnet frame.

Generally, a system for generating a magnetic field having a desired magnetic field strength and/or a desired magnetic field direction is provided. The system can include a plurality of magnetic segments and/or a plurality of ferromagnetic segments. Each magnetic segment can be positioned adjacent to at least one of the plurality of magnetic segments. Each ferromagnetic segment can be positioned adjacent to at least one of the plurality of magnetic segments. In various embodiments, a size, shape, positioning and/or number of magnetic segments and/or ferromagnetic segments in the system, as well as a magnetization direction of the magnetic segments can be predetermined based on, for example, predetermined parameters of the system (e.g., a desired magnetic field strength, direction and/or uniformity of the magnetic field, a desired elimination of a magnetic fringe field and/or total weight of the system) and/or based on a desired application of the system (e.g., performing a magnetic resonance imaging of at least a portion of a patient and/or performing a magnetic resonance spectroscopy of a sample).

An external adjustment device includes at least one permanent magnet configured for rotation about an axis with a first handle extending linearly at a first end of the device and a second handle at a second end of the device, the second handle extending in a direction substantially off axis to the first handle. The external adjustment device further includes a motor mounted inside the first handle and a first button located in the proximity to one of the first handle or the second handle, the first button configured to be operated by the thumb of a hand that grips the one of the first handle or second handle. The first button is configured to actuate the motor causing the at least one permanent magnet to rotate about the axis in a first direction.

A control device includes a moving portion, a magnetic element coupled to the moving portion, at least one magnetic sensing circuit responsive to magnetic fields, and at least one magnetic flux pipe structure. The magnetic element may comprise alternating positive and negative sections configured to generate a magnetic field. The magnetic element may be any shape, such as circular, linear, etc. The magnetic sensing circuit may be radially offset from the magnetic element, and the magnetic flux pipe structure may be configured to conduct the magnetic field generated by the magnetic element towards the magnetic sensing circuit. The magnetic element may generate the magnetic field in a first plane, and the magnetic sensing may be responsive to magnetic fields in a second direction that is angularly offset from the first plane. The magnetic flux pipe structure may redirect the magnetic field towards the magnetic sensing circuit in the second direction.

A cochlear implant including a cochlear lead, an antenna, a stimulation processor, and a magnet apparatus, associated with the antenna, including a case defining a central axis, a magnet frame within the case and rotatable about the central axis of the case, and a plurality of elongate diametrically magnetized magnets that are located in the magnet frame, the magnets defining a longitudinal axis and a N-S direction and being freely rotatable about the longitudinal axis relative to the magnet frame.

Methods and systems for welding a terminal of a battery cell to corresponding terminal tab or busbar are described using a magnet that causes the terminal and tab/busbar to be placed in physical contact. The terminal of a battery cell is aligned in contact with the tab/busbar by the force of a magnetic field. A welder, e.g., a laser welder, can then generate a laser weld beam to weld the terminal of the battery cell to the tab/busbar. Next, the laser weld beam is narrowed, reducing the first diameter to a smaller second diameter. Without touching the tab/busbar or terminal of the battery (which could affect the welding operation), the magnetic field can cause a force that brings the tab and terminal in contact during welding.

An apparatus and method for determining whether a conductive ring is attached to an electrically conductive shaft. The body of the apparatus includes an electrical contact and at least one magnet in a magnet recess. The at least one magnet may include a first and second conductive region, where the first conductive region is a fixed, first radial distance from a center point of the inner cavity and the second conductive region is a second radial distance from the center point of the inner cavity. A shaft recess of the conductive shaft aligns with the magnet recess when the conductive shaft is inserted into the inner cavity and an electric circuit detects whether a metal ring is secured around the conductive shaft in response to simultaneous contact between: the metal ring and the at least one magnet and the conductive shaft and the electrical contact.