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:
Mar. 13, 1984
Filed:
Oct. 16, 1981
Itsuki Ban, Higashi-Oizumimachi, Nerima-ku, Tokyo, JP;
Manabu Shiraki, Yamato-shi, Kanagawa-ken, JP;
Kazuhito Egami, Nakano-ku, Tokyo, JP;
Other;
Abstract
A direct current motor comprising a field magnet provided with 2 mn magnetic poles which are magnetized with the same angular intervals as those of the magnetic poles N and S, where m is an integer of 1 or more, and n is an integer of 3 or more; a magnetic member for closing the magnetic circuit of the magnetic poles of the field magnet; an armature in which m(2n.+-.1) armature coils are arranged with an equal pitch, the armature being directed towards the magnetic poles in the magnetic circuit; electric power supply control device capable of performing the switching of armature current 2 mn (2n.+-.1) times per revolution of the armature; and a rotating shaft for rotatably supporting the armature and one of the magnetic poles, the rotating shaft supported by a bearing disposed in an outer casing of the direct current motor.