Claims
- 1. An inductive coupler comprising a primary core assembly having a primary winding mounted on a primary magnetic core structure which has an E-shape cross section formed by a central pole surrounded by a concentric cylindrical pole, each primary pole having a primary pole face; a secondary core assembly having a secondary winding mounted on a secondary magnetic core structure which has an E-shape cross section formed by a central pole surrounded by a concentric cylindrical pole, each secondary pole having a secondary pole face; said primary and secondary core assemblies being mateable and separable at mating surfaces thereof, pole face to pole face, thereby to form a magnetic circuit for transferring electrical power from said primary winding to said secondary winding by electromagnetic induction; and a thin layer of magnetic electrically conductive material covering the pole faces of the mating surfaces of at least one of said primary and secondary core assemblies coextensive with the interface between said mating surfaces when said assemblies are mated, said thin layer of magnetic material over the central pole being formed with a slit extending spirally radially outwardly from the center thereof to a periphery, and the thin layer of magnetic material over the cylindrical pole containing radial slits each extending across less than the total width of said cylindrical pole in alternating fashion from its inner and outer peripheries to thereby restrict the production of eddy currents in said thin layer of magnetic material.
- 2. An inductive coupler according to claim 1, wherein the intervening area between said central pole and said cylindrical pole is covered by a layer of essentially nonmagnetic heat resistant plastomeric material.
- 3. An inductive coupler according to claim 2, wherein said layer of magnetic material is attached to the respective pole face by an intervening layer of an adhesive material.
- 4. An inductive coupler according to claim 1, wherein said layer of magnetic material is attached to the respective pole face by an intervening layer of an adhesive material.
- 5. An inductive coupler according to claim 1, wherein said thin layer of magnetic material is the result of plating on the associated pole face using a mask during the plating operation to form said slits.
Priority Claims (2)
Number |
Date |
Country |
Kind |
4-301095 |
Nov 1992 |
JPX |
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4-309998 |
Nov 1992 |
JPX |
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Parent Case Info
This application is a division of application Ser. No. 08/428,279, filed Apr. 25, 1995 now U.S. Pat. No. 5,656,983 which is a continuation of application Ser. No. 08/149,630, filed Nov. 9, 1993 now abandoned.
US Referenced Citations (14)
Foreign Referenced Citations (7)
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Country |
646498 |
Dec 1928 |
FRX |
649498 |
Dec 1928 |
FRX |
2124478 |
Nov 1972 |
DEX |
2325703 |
Dec 1974 |
DEX |
61-1774417 |
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JPX |
63-151006 |
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JPX |
63-240331 |
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JPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
428279 |
Apr 1995 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
149630 |
Nov 1993 |
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