Ignition coil for an internal combustion engine

Details Ignition coil for an internal combustion engine Ignition coil for an internal combustion engine

1997-05-27

1999-11-16

Kozma, Thomas J.

Inductor devices

Core forms casing

336 96, 336110, 336212, 336234, H01F 1502, H01F 2724

Patent

active

059865326

ABSTRACT:
The invention is directed to an ignition coil for an internal combustion engine which includes a columnar member having a plurality of magnetic plates, e.g., silicon steel plates stacked one on the other with stacked portions formed on the magnetic plates. The magnetic columnar member includes a first portion having a plurality of magnetic plates stacked one on the other in accordance with increase of a width of each plate, a second portion connected to the first portion and having a plurality of magnetic plates with the same width stacked stacked one on the other, and a third portion connected to the second portion and having a plurality of magnetic plates stacked one on the other in accordance with decrease of a width of each plate, thereby to form the columnar member with a middle portion thereof having a substantially circular cross section. The ignition coil further includes a primary winding and a secondary winding which are wound around the columnar member, a magnetic cylindrical member in which the columnar member is received. A plurality of rectangular recesses are formed on one side of each magnetic plate, and a plurality of rectangular protrusions are formed on the other side of each magnetic plate, to form a plurality of rectangular stacked portions on the columnar member.

REFERENCES:
patent: 2671951 (1954-03-01), Sliwiak
patent: 3137832 (1964-06-01), Hurt, Jr. et al.
patent: 3497949 (1970-03-01), Salt
patent: 4897916 (1990-02-01), Blackburn
patent: 4963849 (1990-10-01), Kowalczyk et al.
patent: 5210930 (1993-05-01), Watabe et al.
patent: 5268663 (1993-12-01), Takeuti et al.
patent: 5703556 (1997-12-01), Kikuta et al.

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