Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Multiple contact type
Patent
1991-04-26
1993-07-13
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Multiple contact type
335131, H01H 6702
Patent
active
052277518
ABSTRACT:
An electromagnetic switch apparatus incorporating a pair of stationary contacts and a movable contact at the rear end of a magnetic path core, wherein the stationary contacts are respectively composed of a contact part and a conductive part aligned in L-shape, wherein the conductive part at axial-directional side extends to the external circumference of an exciting coil, and wherein a terminal member is connected to an end of this conductive part and extends in the radial direction. A pair of stationary contacts are respectively molded in a pair of insulating members or in an insulating member secured to the rear end of the magnetic path core. An O-ring is secured to the external circumference of the insulating member. A case enveloping the exciting coil and a cover member enveloping those stationary and movable contacts respectively sandwich the O-ring in the axial direction to generate water-proof sealing effect. The intermediate region of a hollow rod which is secured to a movable core and has the front end extended to hollow region of an armature rotating shaft is held inside the internal circumferential region of a stationary core accross minimal gap which narrowly allows the hollow rod to slidably move in the axial direction therein.
REFERENCES:
patent: 4990874 (1991-02-01), Shiroyama
Isozumi Shuzou
Shiroyama Shigeru
Donovan Lincoln
Mitsubishi Denki & Kabushiki Kaisha
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