Abstract: This low profile electromagnetic relay includes a base and a support post protruding at one end of the base. An electromagnet assembly is mounted in a generally central position on the base, and has a pair of magnetic pole surfaces on opposite sides of its one end. An armature assembly includes an insulating armature member, shaped generally as a hollow rectangular member with an open space being defined within it and formed with a hole by which it is rotatably fitted over the support post with the electromagnet assembly fitting inside the open space defined within it. A drive portion is connected to the insulating armature member. A pair of mutually opposed armature pieces are mounted on the insulating armature member, and, when the insulating armature member is rotatably fitted over the support post, lie on opposite sides of the one end of the electromagnet assembly and each oppose one of the magnetic pole surfaces of the electromagnet assembly.

Abstract: In this mounting structure and method for a surface mounted type electronic component, the component has at least one terminal which protrudes from its bottom surface and which terminates in a foot portion for being soldered to a printed circuit board. Also, a projection extends from this bottom surface of the electronic component for a distance somewhat less than the amounty by which the terminal projects from it. This projection is provisionally secured by adhesive to the printed circuit board with the foot portion of the terminal overlaying that circuit portion to which it is to be soldered, and then subsequently this terminal foot portion is soldered to this circuit portion. Thereby, during the soldering process, there is no risk of the terminal foot portion becoming displaced from the circuit portion and thus badly soldered thereto, because of the locating action of the adhered projection.

Abstract: A polarized electromagnetic relay having four sets of single-pole double-through contact switches comprises a coil spool wound with a coil, a bar-like core inserted in the coil spool, an elongated yoke extending in parallel with the core and having two pairs of laterally opposing erect legs at both ends thereof, respectively, wherein the pole ends of the core are disposed, respectively, between the paired erect leg. A pair of movable armatures each composed of a permanent magnet having pole pieces at both sides are so disposed between the paired erect legs of the yoke, respectively, that the pole end of the core is positioned between the pole pieces of the permanent magnet. The pair of the armatures are slideably supported on guide means formed in end collars of the coil spool so that the armatures can move independent of each other. The relay exhibits high sensitivity with a miniaturized structure and assures reliable switching operations.

Abstract: Having a core wound with the magnetizing winding, and a yoke separated from the core, and an armature which has the permanent magnets, both pole pieces of the core and the facing-surfaces of the yoke being positioned apart in a predetermined space; in said space the magnetic poles of the permanent magnets being stationed; and through a joint-work of the magnetic flux created by the magnetizing winding and the armature flux created by the permanent magnets the armature is made to relatively reverse-displace against the core and the yoke.

Abstract: There is provided a method of producing a contact switching device comprising a step of pressing an electrically conductive metal sheet to form a lead frame having at least one relatively resilient contact member extending from one of the terminal portions and a stationary contact member extending from the other terminal portion, the relatively resilient contact member and the stationary contact member being disposed in mutually opposed and spaced apart relation, a step of bending external rim portions of the lead frame while the relatively resilient contact member is biased in such a manner that the opposed relatively resilient contact member and stationary contact member are brought together into partially overlapping relation, a molding step for forming an insulating base at base portions of the two terminal members, and a terminal-forming step of cutting the lead frame to leave the two terminal portions.

Abstract: There is provided a method of producing a contact switching device comprising a step of pressing an electrically conductive metal sheet to form a lead frame having at least one relatively resilient contact member extending from one of terminal portions and a stationary contact member extending from the other terminal portion, said relatively resilient contact member and said stationary contact member being disposed in mutually opposed and spaced apart relation, a step of bending external rim portions of said lead frame while said relatively resilient contact member is biased in such a manner that the opposed relatively resilient contact member and stationary contact member are brought together into partially overlapping relation, a molding step for forming an insulating base at base portions of said two terminal members, and a terminal-forming step of cutting said lead frame to leave said two terminal portions.

Abstract: Electric contact switching device comprising a plurality of contact member pairs, each pair consisting of a first lead member having a first contact and a second lead member having a second contact which are disposed in mutually opposed relation, a first insert-molded base member having a compartment and carrying the first and second lead members so as to house the first and second contacts within the compartment thereof, a second insert-molded base member carrying the second lead members, and contact driving means for driving the first and/or second contacts to provide switching operations, said first and second base members being connected through the second lead members each other.

Abstract: Electric assembly including an insert-molded base member carrying connecting terminals, an electric block member mounted on the base member, and an upper cover fitted onto the base member to cover the electric block member, said base member comprising inner and outer walls which therebetween form an opening extending vertically through the entire thickness of the base member in such a manner that a lower portion of the upper cover and the terminals are exposed to the opening, said opening being filled with a sealant so that the upper cover, terminals and base member may be firmly secured together in position.

Abstract: A miniaturized electromagnetic device is disclosed, which is applicable to an electromagnetic relay of the flat package type.The electromagnetic device comprises a magnetic core having the configuration of the capital letter H, a coil wound round the magnetic core, and a pair of magnetic members for alternatingly forming two closed magnetic circuits in cooperation with said magnetic core, said magnetic members being formed in one-piece with the aid of connecting members of non-magnetic material, one of said magnetic members including a permanent magnet, and each tip of said magnetic member confronting the corresponding tip of said magnetic core and the clearance therebetween being changeable by the magnetic force generated therebetween as said coil is energized.