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:
Jul. 25, 1978
Filed:
Mar. 15, 1976
Keisuke Ikegami, Tokyo, JP;
Susumu Hoshimi, Yokohama, JP;
Sony Corporation, Tokyo, JP;
Abstract
A cylindrical core with toroidal windings at angularly spaced locations on the core, for example, as in the stator of a brushless, slotless DC motor for a record player or tape recorder, is formed of a plurality of annular core elements each having an axial slot and initially being axially superposed with the respective slots in axial alignment. The windings are conveniently formed individually on respective bobbins which are dimensioned to pass through the axially aligned slots for installation on the superposed core elements, whereupon, the latter are preferably turned relative to each other for angularly offsetting the respective slots and thereby minimizing the turbulence of magnetic flux that can result therefrom.