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:
Jun. 02, 1998
Filed:
Sep. 15, 1995
Terry Chester Lahr, Friendsville, PA (US);
Garey George Roden, Apalachin, NY (US);
Celestica Inc., Toronto, CA;
Abstract
A transformer comprises a ferrite core and a printed circuit board for primary and/or secondary windings. The ferrite core comprises first and second trunk portions parallel with each other and first and second leg portions parallel with each other. The trunks and first and second leg portions are positioned into a rectangular configuration. The core also comprises a third leg portion parallel to the first and second leg portions and interposed midway between the trunk portions. A cross-sectional area of the first and second leg portions is approximately the same as each other, approximately one half the cross-sectional area of the third leg portion, less than the cross-sectional area of the first trunk portion and less than the cross-sectional area of the second trunk portion. The core is mounted to the printed circuit board such that the first, second and third legs extend through openings in the printed circuit board and the windings surround the third leg portion inside of the first and second leg portions. The core further comprises first and second step portions extending from the first and second trunk portions adjacent and interior to the first and second leg portions, respectively. The first and second step portions have a shorter length than the first and second leg portions and abut against one surface of the printed circuit board, whereby the first trunk portion is offset from one surface of the printed circuit board.