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. 24, 1987
Filed:
Aug. 08, 1985
Eiichi Matsuura, Chiba, JP;
Nobuo Tsukada, Tokyo, JP;
Seiko Instruments & Electronics Ltd., Tokyo, JP;
Abstract
A wristwatch comprises a watch movement having an outwardly curved frame portion, and a micro motor mounted on the watch movement. The micro motor comprises a curved magnetic core, a coil wound on the magnetic core, and a stator connected to the magnetic core to define therewith a closed magnetic flux path and having an opening therein in which a rotor is rotatably disposed. The magnetic core is curved outwardly with a curvature similar to and conforming to that of the outwardly curved frame of the watch movement, and the curved magnetic core overlies the curved frame of the watch movement so that no wasted space exists therebetween. The stator comprises a pair of stator pieces each connected at one end to a respective end portion of the curved magnetic core and the stator pieces have curved side edge portions extending at least partly along the curvature of said curved mangetic core to thereby form a compact overall assembly.