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:
Feb. 12, 1985
Filed:
Jul. 06, 1983
Yuichi Kamo, Tokyo, JP;
Nobuo Mikami, Tokyo, JP;
Kazutoshi Wakamatsu, Tokyo, JP;
Kunio Naito, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a transfer-type electromagnetic relay comprising first and second lead members (26, 27) for first and second fixed contact studs (31, 32), respectively, and a third lead member (28) for an armature (36), first and second permanent magnets (46, 47) are directed to back surfaces of the first and the second lead members, respectively, with poles of the same name brought nearer to the respective leads. A single permanent magnet may be placed in the above-mentioned manner. Preferably, first and second arm members (43a, 43b) are attached to a leaf spring (37') fixed to the armature and extended from a central portion of the leaf spring on both sides thereof in directions different from each other. The leaf spring is manufactured without any bend and is therefore substantially flat. The third lead member partially comprises a non-magnetic portion at a center area thereof to support the armature. In order to provide make-before-break contacts, an armature height is rendered lower than a sum of a fixed contact height and a movable contact height given by each fixed contact stud and each movable contact stud.