The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 25, 1993
Filed:
Mar. 11, 1992
Eiichi Kimura, Gumma, JP;
Koji Nara, Gumma, JP;
Mitsuba Electric Mfg. Co., Ltd., Kiryu, JP;
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.