Method of making an ignition coil

Details Method of making an ignition coil Method of making an ignition coil

1995-07-26

1997-11-11

Eley, Timothy V.

Metal working

Method of mechanical manufacture

Electrical device making

29609, 123634, 336110, 336178, 336216, H01F 7127, H01F 1706, H01F 2724

Patent

active

056850654

ABSTRACT:
An inner core for an ignition coil is inserted into a bobbin, around which a primary winding and a secondary winding are disposed. An outer core is inserted into a housing to form a magnetic circuit with the inner core. A magnet member, which is made of a permanent magnet material such as Sm.sub.1 Co.sub.5, is connected to the inner core. The bobbin, which is assembled with the inner core, the magnet member, the primary and secondary windings, is inserted into the housing, with the magnet member positioned between the inner core and the outer core, and then the inside of the housing is molded by a synthetic resin. Thereafter, the magnet member is magnetized to provide a predetermined magnetic force. The magnet member may be molded by Sm.sub.1 Co.sub.5 to form a plate having a thickness of 1.5 mm and more.

REFERENCES:
patent: 2844786 (1958-07-01), Urk et al.
patent: 4546753 (1985-10-01), Pierret
patent: 4658799 (1987-04-01), Kusaka et al.
patent: 4849728 (1989-07-01), Goll et al.
patent: 4926152 (1990-05-01), Ito et al.
patent: 4990881 (1991-02-01), Ooyabu
patent: 5044328 (1991-09-01), Umezaki
patent: 5257611 (1993-11-01), Chapekis et al.

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