Choke coil comprising a bead of a soft-magnetic material

Details Choke coil comprising a bead of a soft-magnetic material Choke coil comprising a bead of a soft-magnetic material

1994-05-03

1995-02-21

Kozma, Thomas J.

Inductor devices

Core forms casing

174 91, 336 90, 336192, 336221, 336233, H01F 1704, H01F 2724

Patent

active

053920171

ABSTRACT:
The choke coil comprises a bead of a soft-magnetic material in which a number of ducts extend in parallel. An electrically conductive wire comprising fee ends is accommodated in the ducts. The choke coil comprises means for shielding a portion of the turn which extends outside the ducts. To this end, for example an electrically insulating housing is arranged around the bead. The housing consists of two approximately cylindrical portions, each of which comprises a substantially closed end face which is situated on a first end portion. The cylindrical portions are axially slid over the bead with their second open end portion fitting one into the other. In each end face there is provided at least one opening for feeding out the wire. When the choke coil is also provided with electrically insulating caps having a wire passage in the prolongation of the axis of the bead, the wire fed out will be oriented along said axis.

REFERENCES:
patent: 2943140 (1960-06-01), Bander
patent: 4656451 (1987-04-01), Pomponio
patent: 4972459 (1990-11-01), Sommer
RCA Technical Notes No. 704, Jan. 1967, "VHF/UHF Balum" Steven Wlasuk.
Philips Components and Materials Handbook C5, Apr. 1986, Fig. 5, p. 335.

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