Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Multiple contact type
Patent
1992-03-11
1993-05-25
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Multiple contact type
335131, H01H 6702
Patent
active
052144011
ABSTRACT:
An electromagnetic switch suitable for controlling large electric current in starter motors or the likes comprising a rod which is actuated in a longitudinal direction by an electromagnet, a fixed contact member, and a moveable contact member carried by the rod for selective engagement with the fixed contact member by energization and deenergization of the electromagnet. The moveable contact member is allowed to rotate around an axial line perpendicular to the axial line of the rod so that the moveable contact can achieve a favorable contact even when the fixed contact member involves dimensional errors, and that the moveable contact may be easily detached from the fixed contact member even when the two contact members are partly fused together. The rotational movement of the moveable contact member can be achieved by yieldably or elastically holding the moveable contact member between a pair of convex surfaces on the rod. Alternatively, a combination of a planar holding surface and a coned disc spring interposed between the planar holding surface and the moveable contact member may be used in place of one of the convex surfaces.
REFERENCES:
patent: 4293835 (1981-10-01), Davis et al.
patent: 4637267 (1987-01-01), Mazzorana
patent: 4706037 (1987-11-01), Prouty et al.
Kimura Eiichi
Nara Koji
Donovan Lincoln
Mitsuba Electric Mfg. Co. Ltd.
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