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:
Jan. 13, 1987
Filed:
Oct. 10, 1985
Takayuki Ishii, Chiba, JP;
Yuji Yamauchi, Chiba, JP;
Sony Corporation, Tokyo, JP;
Abstract
A double-layer coil for an electric motor is formed of a single continuous conductor with the two layers being wound simultaneously. A first length of conductor is wound about a pulley to form a coil and at the end of that coil but without breaking the conductor another coil is commenced to be wound about a rotating bobbin, with the coil of the first length wound on the pulley being caused to orbit the bobbin at a rate twice the bobbin rotation speed, whereby the conductor coil is unwound from the pulley and rewound on the bobbin at and the same time a further conductor is being wound about the bobbin to form a second coil, thereby forming both layers of the coil simultaneously.