Moisture-tight wound ferrite toroidal core with resin envelope
AssigneeSiemens Aktiengesellschaft
InventorJosef Dirmeyer
Life of this patent
Estimating the term…
Abstract
A ferrite toroidal core is inserted into an annular trough enclosed by a cap with a winding applied about the trough member which is then sealed by an envelope of resin. The trough member includes resilient tabs extending internally of at least one mutually concentric trough wall, the tabs having their free edges disposed against the toroidal core so that the core is fixed and centered within the trough and so that an air cushion is provided between the core and the trough wall.
Claims10
A wound ferrite toroidal core including a winding, a ferrite core member, and a resin envelope, comprising:
- an annular trough member of thermoplastic material and including mutually concentric trough walls each with an end face at an open side of said trough member;
- resilient tabs extending from an inside surface of at least one of said trough walls and having free edge faces, said resilient tabs being flattened angularly-projecting axially-extending flexible member's;
- said ferrite core member disposed within said trough member with at least said free edge faces of said tabs disposed against said core member such that said core member is centered in said trough member;
- and
- a cap sealed over said end faces of said trough walls to form a cover said trough member;
- whereby the winding is wound around said trough member and said cap and then enveloped in resin.
A wound ferrite toroidal core assembly, comprising:
- an annular trough member including concentric inner and outer trough walls,
- said inner and outer walls each having an end face,
- said end faces each having a ridge extending along said end faces;
- a ferrite toroidal core member disposed within said annular trough member;
- a plurality of resilient tabs extending inwardly from an inner surface of said outer trough wall and formed in one piece with said trough member, said resilient tabs each having a free end abutting said core member to hold said core member centrally within said trough member and thereby define an air space between said core member and at least one of said inner and outer trough walls;
- a cover sealed over said end faces of said inner and outer trough walls;
- a winding applied about said trough member and said cover;
- and
- a resin envelope over said winding and said trough member and said cover.
Dependencies are inferred from the claim text.