In an electromagnetic switch of a starter, a bobbin has two terminal holders on a flange Each of the terminal holders defines a slot on its end surface and a terminal is press-fitted in the slot in an axial direction of the bobbin An end of an excitation coil wound around the bobbin is pulled out the bobbin and connected to the terminal A molded cover provides a through hole and is mounted on the terminal so that the terminal passes through the through hole A sealing member is press-fitted on the terminal to air-tightly seal the through hole A rod cover fitted on a rod supporting a movable contact has slits on its cylindrical part in the axial direction The slits are closed before a distal end of the cylindrical part

Electromagnetic switch for starter

An electromagnetic oscillating type pump for oscillating diaphragms connected to an oscillator through electromagnetic oscillation of the oscillator with magnetic body by utilizing magnetic interaction between an electromagnetic portion comprising one or a plurality of iron cores and the magnetic body. A frame portion of resin mold is formed by molding resin on an outer surface of the electromagnetic portion. It is possible to obtain electromagnetic oscillating type pumps capable of decreasing manufacturing costs and of exhibiting high acoustic insulating effects.

Electromagnetic oscillating type pump and method for manufacturing the same

The solid insulation transformer has a rectangular core covered with a compressible closed-cell foam to eliminate stress during curing of the cast dielectric material surrounding the core and during operation. Heat pipes are placed between the inner coil and the core to extract heat before the temperature builds up. For safety and to eliminate the need for a separate enclosure, an outer multi-layer casing having an incorporated grounded conductive layer is provided to cover the sides of the cast body. The outer casing prevents explosion if dielectric break down and arcing occur, and reduces the danger of electric shock.

Solid insulation transformer

Two coil assemblies 2a and 2b each having a coil 6 wound around a bobbin 5, a fixed and a movable iron cores 8 and 11 provided in a center hole 7 of the bobbin 5, and a pair of pin-like coil terminals 9a and 9b protruding from the end surface from the bobbin 5 are integrated into a single magnetic frame sized so as to accommodate two coil assemblies simultaneously, or a single coil assembly 2a and a dummy member 3 having essentially the same external shape and size as the coil assembly are integrated into the magnetic frame. These components are sealed and integrated into a synthetic resin 22.

Double- or single-solenoid type selector valve encapsulated in resin

An armature, a method for producing the armature and a mold for molding the same are so configured that the coil pitch of each of phase coils is set to a value of 125% or less of the pole pitch, the gap between the respective phase coils of any one of layers is so disposed as to face the intenral space of each of the phase coils of the other layer being contact with that layer, and the registering face of the mold for molding the periphery of the armature is so formed as to be parallel with the axial direciton of the armature.

Method of producing a coreless armature

A method for fabricating a molded solenoid device which is encased in an insulating synthetic resin shell, in which a resilient sealing cover member of an electrically insulating material is fitted on each one of a couple of solenoid coil terminals which are projected from a solenoid coil bobbin. The sealing cover members on the respective coil terminals are brought into intimate contact with inner edges of coil terminal escape holes in a mold in which a solenoid assembly is to be molded, thereby forming tight seals around the coil terminals in the coil terminal escape holes while a molten synthetic resin material is being introduced into the mold cavity around the solenoid assembly.

O Smc Corp. Tsukuba Tech.Ctr Shimauchi

Papers

Method for fabricating solenoid device for electromagnetic valves