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:
Sep. 13, 1983
Filed:
Jun. 15, 1981
Itsuki Ban, Higashi-Oizumimach, 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 2n magnetic poles which are magnetized with the same angular intervals as those of the magnetic poles N and S, where n is an integer of 1 or more; a magnetic member for closing the magnetic circuit of the magnetic poles of the field magnet; a plurality of armature coils in such a manner that the angular intervals of the electrically conductive portions thereof, contributing to the generation of torque in the armature coils, are substantially equal to the magnetic pole width of the field magnet; electric power supply control device to which the terminals of the armature coils are connected; short-circuit members for short-circuiting the winding initiation terminals of predetermined armature coils and the winding end terminals of other predetermined armature coils through the electric power supply control device; an armature comprising armature coils in the first series and armature coils in the second series through which the short-circuit members and the plurality of armature coils are connected in parallel to the positive pole and negative pole of a DC power source, the armature positioned so as to face the field magnet; and a rotating shaft for rotatably supporting the armature or the filed magnet, the rotating shaft rotatably supported by bearings disposed on an outer casing of the direct current motor.