Inductor devices – With outer casing or housing – Internal inductor support
Patent
1992-10-16
1994-08-30
Kozma, Thomas J.
Inductor devices
With outer casing or housing
Internal inductor support
324127, 333 12, 336175, 336176, 336178, 336212, H01F 1706, H01F 2702, H01F 2726
Patent
active
053431847
ABSTRACT:
An electric noise absorber comprising at least two ferrite pieces having abutting planes, at least two case members containing the ferrite pieces respectively and being closed by means of engagement members, and a spring member provided in at least one of the case members for pressing the ferrite pieces against each other when the case members are closed. Since the case members for keeping the ferrite pieces in appropriate positions and the spring member for pushing up the ferrite pieces for close contact are separately molded, the case members are bestowed with strength and the spring member with elasticity, both suitable for their own purposes. The case members requires no apertures for biasing members and therefore outside magnetic substance is prevented from contacting with the ferrite pieces contained in the case members.
Another type of electric noise absorber comprising longitudinally divided pieces of magnetic substance shaped to surround the periphery of an electric cable when closed, and magnetic fluid applied to at least one of abutting planes of the divided pieces for securely contacting the abutting planes with each other. Even if the abutting planes are rough and/or are not exactly horizontal surfaces, the magnetic fluid allows the ferrite pieces to be closed with no gaps between them. Consequently, the ferrite pieces keep substantially as low impedance as that of a non-divided ferrite piece.
REFERENCES:
patent: 1251651 (1918-01-01), Espenschied
patent: 2976502 (1961-03-01), Hill
patent: 3195086 (1965-07-01), Taylor
patent: 3663913 (1972-05-01), Kato et al.
Kitagawa Hiroji
Matsui Kazuhiro
Kitagawa Industries Co., Ltd.
Kozma Thomas J.
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