There is provided a power transmission device to switch a coupled state and an uncoupled state between a first member and a second member which are arranged in a transmission path of a driving force to thereby control transmission of the driving force. The device includes a movable body having ferromagnetic property, a first magnetic path and a second magnetic path, and a permanent magnet. The device also includes a driving portion to excite the electromagnet in the forward direction and then increases an attraction force on a side on which a magnetic flux is increased or decreased.

A magnetic release assembly includes a housing defining a cavity, a permanent electromagnet positioned within the cavity, and a microcontroller electronically coupled with the permanent electromagnet. The microcontroller is configured to selectively provide power to the permanent electromagnet. A timer board is in communication with the microcontroller. A power source is electronically coupled with the microcontroller, the permanent electromagnet, and the timer board. The microcontroller is configured to provide power to the permanent electromagnet in response to an alarm from the timer board.

An automatic dispensing device for dispensing a volatile substance, the device comprising: a fan configured to generate airflow and dispense the volatile substance from the device; a drive apparatus having at least one electromagnetic coil connectable to a drive circuit; wherein the fan comprises at least one magnet located along an arc of the fan and the electromagnetic coil is configured to attract or repel the at least one magnet; wherein the drive circuit is configured to switch the current direction in the electromagnetic coil to sequentially attract and then repel the at least one magnet as the fan rotates.

A magnetic actuator for a magnetic suspension system includes a core section having an annular yoke and radially directed teeth joining the yoke. The magnetic actuator includes coils surrounding the teeth and a mechanical structure having a first section and a second section. The first section is attached to the yoke and conducts magnetic flux axially. The second section joins the first section and conducts the magnetic flux radially in a direction opposite to a direction of the magnetic flux in the teeth. The magnetic actuator includes a mechanical safety bearing that is between the second section and the teeth. Thus, the safety bearing is in a room surrounded by a magnetic flux circulation path. Therefore, the safety bearing does not increase an axial length of the magnetic suspension system.

A substrate transfer device is provided with: a movement tile provided in a substrate transfer region and including first magnets for changing a state of a magnetic field and a movement surface; a substrate transfer module including a second magnet that receives a magnetic force and configured to move along the movement surface while being floated from the movement surface by the magnetic force; a transfer controller for controlling the magnetic field formed by the first magnets to move the substrate transfer module along a preset route; a detector for detecting an index value corresponding to a magnitude of a deviation, from the preset route, of an actual movement path of the substrate transfer module moving along the movement surface; and a correction parameter calculation part for calculating a correction parameter for correcting the magnetic force acting on the second magnet based on the index value.

The invention relates to a loading method for a machine tool (12), especially for a bending machine, having a tool-transfer device (1), a tool holder (17) of the machine tool (12), and a tool rack (13), wherein the tool holder (17) and the tool rack (13) are connected via a guide rail (4), and the tool-transfer device (1) has a magnetic retaining device (5). The tool-transfer device (1) is moved to a machining tool (18), which is arranged in a pick-up position (20) in a tool holder (17) or in a tool rack (13). The machining tool (18) is picked up and retained by means of a magnetic retaining device (5) of the tool-transfer device (1) and moved along the guide track (4) to a deposition position (21). There the machining tool (18) is deposited by deactivation of the magnetic retaining force (22). The magnetic retaining device (5) has an electromagnet (6) having an electronic activating device (7) wherein, upon deactivation of the magnetic retaining force (22), a demagnetization is performed by the activating device (7).

The operating device (10,10′) intended to be installed in a vehicle is provided with a housing (12) and an operating element (14,14′) which is movably mounted in and/or on the housing (12) and can be manually transferred from a rest position to a function-triggering position. Furthermore, the operating device (10, 10′) is provided with a switch (22) which is adapted to be actuated by the operating element (14, 14′) when it is manually transferred to the function-triggering position, a holding-force generation unit (26, 26′) for generating a holding force with which the operating element (14, 14′) is held in its rest position, and a control unit (32) for electrically controlling the holding-force generation unit for the purpose of setting the holding force.

A payload-bus kinematic interface system includes one or more kinematic devices. Each kinematic device includes a first contacting surface and a second contacting surface. The first contacting surface kinematically interfaces with the second contacting surface, passing loads or forces to the second contacting surface.

A permanent electromagnetic holder is provided with: a first magnet; a second magnet; and a coil, the first magnet being configured such that magnetic pole surfaces of different magnetic poles are oriented in a thrust direction of an axial center orthogonal to the attracting surface, the second magnet being configured such that magnetic pole surfaces of different magnetic poles are oriented in the thrust direction of the axial center and being disposed outside the first magnet, the coil being disposed between the first magnet and the second magnet, the first magnet, the second magnet, and the coil being arranged so as to overlap in the radial direction of the axial center, and an operation of switching an attraction ON/OFF state being carried out by switching a magnetizing direction of the first magnet through instantaneous energization of the coil when the attraction ON/OFF state is switched.

A switchable permanent magnetic unit is disclosed. The unit comprises: a housing, first and second permanent magnets, and a conductive coil. The first magnet is mounted within the housing and the second magnet is rotatable between first and second positions and mounted within the housing in a stacked relationship with the first magnet. The unit generates a first level of magnetic flux at a workpiece contact interface when the second magnet is in the first position and a second level of magnetic flux at the interface when the second magnet is in the second position, the second level being greater than the first level. The conductive coil is arranged about the second magnet and generates a magnetic field. A component of the conductive coil's magnetic field is directed from S to N along the second magnet's N-S pole pair when the second magnet is in the first position.