Abstract: An electromagnetic contactor according to the present invention is so constructed that the electromagnetic device and the fixed point of contact are fixedly fitted into a casing which is divisible in the direction along the moving direction of a polar contact. Moreover, a bottom casing with a screw mounting hole is fitted in the outer peripheral portion at the lower end of the casing. Therefore, the rigidity of the casing as a whole is enhanced, and at the same time the working characteristics can be prevented from being changed when the screw is mounted. Furthermore, the positioning accuracy of the electromagnetic device relative to the fixed point of contact is determined only by the dimensional accuracy of the casing and the electromagnetic device, and by the position accuracy of the fixed point of contact. The contact pressure is improved to be stable.

Abstract: A polarized relay with an electromagnetic drive comprises an electromagnetic yoke composed of a core wound with a coil and a yoke body, and having one end portion of one magnetic polarity and a pair of bifurcated end portions of the other magnetic polarity opposite to the one magnetic polarity. The bifurcated end portions are separated in opposition from each other. The one end portion of the yoke is disposed between the bifurcated end portions so as to cooperate to form a pair of working gaps. A movable block of a substantially C-like configuration incorporating a permanent magnet has two magnetic pole pieces which are disposed within the working gaps, respectively. Guide is provided for guiding the movable block in response to energization and deenergization of the coil so that the pole pieces are movable within the respective working gaps. A contact mechanism including movable contacts is mechanically coupled to the movable block to make or break circuit.

Abstract: A polarized electromagnetic relay apparatus for assembling a coil spool with a terminal carrying base plate is disclosed. The coil spool assembly has a front collar with a projecting piece. The projecting piece is adapted to engage with a latch hole in the terminal carrying base plate. The terminal carrying base plate has jaw-like, offset portions which engage with supporting offset portions formed in the rear collar of the coil spool assembly. The flexible projecting pieces may be of deformable material in order to easily engage with the latch hole of the base plate. The flexible projecting pieces can be tapered, also to facilitate engagement with the base plate latch hole. A terminal holder is formed on the rear collar of the coil spool assembly and is adapted to receive terminals from the coil. The terminal holder comprises the supporting offset portions which engage with the jaw-like offset portions of the base plate. The terminal holder is of a greater thickness than the base plate.

Abstract: A molding method and apparatus in which an insert part is supported in a mold cavity by a pin. The pin is withdrawn when the resin pressure in the mold exceeds a predetermined value.

Abstract: A polarized electromagnetic device is disclosed having a generally I-shaped magnetic core member, a coil which is wound on the center portion of the core member, a pair of permanent magnets which are arranged in parallel with and outside of the respective end portions of the core member, and mutually confronting first and second armature plate members which are joined together through the pair of permanent magnets, with each magnet at the opposite end portions of the armature plate members in order to provide a spacing for accommodating the core member between the armature plate members, and consequently leaving a gap for relative movement therein. The core member and armature plate members are supported to be swingable relative to each other for movement about a center transverse axis of the center portion of the core member.