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:
Aug. 29, 1989
Filed:
Jul. 16, 1987
Donald E Ellison, St. Clair Shores, MI (US);
United Technologies Automotive, Inc., Dearborn, MI (US);
Abstract
A coil assembly, as for the secondary of a high voltage ignition transformer, includes a coil subdivided into segments in slots defined by radial flanges on a coil bobbin. The bobbin spindle is of a polygonal cross section, preferably having four axially-extending corners along its outer perimeter. Cross-over grooves provided in the bobbin flanges allow the coil wire transitioning from one slot to the next to be relatively isolated from contact with the multiple layers of coil-turns deposited in a slot. The angular geometry of the core spindle and the geometry and positioning of the cross-over grooves in the flanges is such as to afford relatively-easily molded grooves and wide slot widths relative to the thickness of the flanges in which the grooves are formed.