Coil device

Details Coil device Coil device

1992-09-30

1993-05-11

Picard, Leo P.

Inductor devices

With closed core interrupted by an air gap

H01F 1706

Patent

active

052105148

ABSTRACT:
A coil device includes two magnetic cores each having a U-shape in section forming a closed magnetic path therein with their legs being opposed to each other and having a gap in such path, and a coil wound so as to cover the gap. In this structure, the mutually opposed portions of the magnetic cores in the region to form the gap are so shaped that the cross-sectional area of the fore end becomes smaller than that of the base end, thereby preventing concentration of any leakage magnetic flux on the gap portions while averting abnormal generation of heat in the coil to consequently eliminate harmful influence of noise on peripheral apparatus or components.

REFERENCES:
patent: 2777099 (1957-01-01), Foss et al.
patent: 2825849 (1958-03-01), Lufkin
patent: 3143686 (1964-08-01), Vonderschmitt
patent: 3434085 (1969-03-01), Gang
patent: 3761853 (1973-09-01), Schutz et al.
patent: 4042898 (1977-08-01), Tomita et al.
patent: 4356468 (1982-10-01), van Laar
patent: 4870380 (1989-09-01), McGinley

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