Abstract: A magnetic clutch includes a rotor and an armature facing to each other for establishing a coupling connection. A serpentine magnetic circuit is formed in the rotor and the armature. A method for manufacturing a rotor of a magnetic clutch of the invention comprises the step of deforming a single ring-shaped plate of a magnetic material, by a plastic deformation process such as cold forging, into a ring-shaped element comprising generally concentric inner and outer cylindrical walls, and a ring-shaped bottom wall. Prior to or after or simultaneously with this step, ring grooves are formed on the bottom wall. A nonmagnetic material is then filled in the ring grooves, and the bottom surface of the bottom wall is cut to form a friction surface. By this cutting, the nonmagnetic material is exposed at the friction surface.

Abstract: A steering wheel body includes a ring core, a plurality of spoke cores extending from the ring core, a surface layer that covers the ring core and the spoke cores, and a pad which is located at the center of the ring core and formed continuously from the surface layer. A mounting member attached to the wheel body is constituted by either an insert embedded in the insert, an air bag mechanism accommodated in the insert, or a boss plate connecting the wheel body to a steering shaft. Adjacent spoke cores are connected to each other by connectors. The mounting member is attached to the connectors.

Abstract: A method for establishing a connection between a first communication device, connected to a communication network and having at least one identity, and one or several second communication devices, connected to the communication network and located in a limited location (i.e., paging) area, each of them having at least one identity. In order that the user of the system may define the location area dynamically, the first communication device sends to the communication network a message containing an identification of the location area and the identity of one or several second communication devices and the communication network calls at least one subscriber device provided with the identity only in the location area defined by the location area identification.