Wire cross-over arrangement for coil assembly

摘要

A coil assembly, as for the secondary of a high voltage ignition transformer, includes a coil subdivided into segments by radial flanges on a coil bobbin. Cross-over grooves provided in the bobbin flanges allow the coil wire transitioning from one coil segment or slot into the next to be relatively isolated from contact with coil-turns of greatly different electrical potential. The formation of the cross-over groove in a respective bobbin flange is such that the cross-over of the coil wire from one segment to the next is forced to occur and remain at a radially-outward position relative to the formed coils. Guide ridges facilitate the cross-over of the coil wire at the entry to a respective cross-over groove.