Abstract: A permanent magnet rotor type electric motor is formed of a stator core generating a rotation magnetic field, and a rotor core rotationally situated inside the stator core. The rotor core includes a first core member for generating a magnet torque, permanent magnets embedded in the first core member for forming magnetic poles, and a second core member for generating a reluctance torque without having a permanent magnet therein. The second core member is coaxially united with the first core member so that the rotor core is divided into the first core member for generating the magnet torque and the second core member for generating the reluctance torque.

Abstract: In a permanent magnet rotor type electric motor having a stator core generating a rotation magnetic field and provided therein with a rotor core in which each magnetic pole is formed by a permanent magnet, the rotor core is fabricated by coaxially and unitedly joining a first core member and a second core member, in which a first permanent magnet of a predetermined cross-section shape is embedded per magnetic pole in the first core member, and a second permanent magnet which is made of a different material and has a different cross-section shape from those of the first permanent magnet is embedded per magnetic pole in the second core member, thereby achieving the permanent magnet rotor type electric motor having the performance and size appropriate for the intended use.

Abstract: A cap is attached to a high-tension cable terminal for sealing an opening formed on an automobile engine. The cap includes a hollow cap body made of rubber and having a cylindrical portion, a hood integrally formed with and extending outwardly from the cap body, and a seal ring securely mounted on the cylindrical portion of the cap body. The seal ring is made of rubber different from the rubber of the cap body and has a high heat resistance and a sufficient elasticity. When the cap is mounted on the opening, the seal ring engages the inner peripheral surface of the opening to provide a seal against dirt, dust and water. Alternatively, the seal ring may be made of rubber of the same quality as the cap body. In this case, the hardness of the seal ring is rendered to be less than that of the cap body.

Abstract: A slippage preventer for an ignition cable terminal comprises a holder cap 11 for covering a head of a grommet 3, a holder body 10 having an opening 10a into which the grommet is inserted and for covering a lower hanging portion, and locking means provided on the holder body 10 for engaging with a fitting portion provided on said ignition tower so that the holder body is secured to the ignition tower. The holder cap 11 is rotatably supported on the holder body 10. The preventer has a very simple construction and can set a direction of the grommet 3 to be attached to an ignition tower irrespective of the kind of the tower.

Abstract: A moving iron instrument comprising a cylinder divided into two parts, a cylinder member to which a fixed iron vane is attached, and a frame member for holding a moving shaft to which a moving iron vane is attached, wherein the two members are made of an insulating material.