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. 30, 2003
Filed:
Apr. 19, 2001
Hans Willem Van Kesteren, Eindhoven, NL;
Frank Cornelis Penning, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A magnetic head suitable for use in a magneto-optical apparatus. The magnetic head has a flat electromagnetic coil ( ) with a central opening ( ). The coil has parallel coil layers ( ), each of the coil layers having a turn ( A, B) arranged around the central opening. At least one of the coil layers has turns of which the turns closer to the central opening have smaller widths (w) than the turns further away from the central opening. At least one of the coil layers has an outermost turn ( B ) situated closer to the central opening than the outermost turn ( A ) of one of the other coil layers. The defined coil structure has a limited capacitance while the power dissipation is also limited.