Coupling transformer assembly

Claim 2

In a coupling transformer assembly, a first toroidal core fabricated of a material having a high magnetic permeability, a winding comprising a plurality of turns wound on said first toroidal core, a second toroidal core of substantially smaller size than said first toroidal core coaxially disposed within the opening of said first core at the central plane thereof, said second core being fabricated of a material of high magnetic permeability and having no windings wound thereon, an electrically conductive spindle member extending coaxially through said second toroidal core and through at least a portion of said first toroidal core, and an electrically conductive casing enclosing said first and second toroidal cores and connected to the ends of said spindle member to form with said spindle member a single-turn winding linking both of said cores.

Claim 3

A coupling transformer assembly as in claim 1 together with at least one additional winding wound on said first toroidal core.

Claim 4

A coupling transformer assembly as in claim 1 wherein said casing comprises a generally toroidal shell formed of two parts joined together at the central plane of said first toroidal core, each of said parts being formed to include a central web portion to which the ends of said spindle member are connected.

Claim 5

A coupling transformer assembly as in claim 1 wherein said second toroidal core comprises a plurality of annular inductor core members coaxially stacked in intimate contact with each other.

Claim 6

In a coupling transformer assembly, a first toroidal core fabricated of a material having a high magnetic permeability, second and third toroidal cores spaced apart from each other and disposed coaxially of said first toroidal core, a winding comprising a plurality of turns wound on said first core, an electrically conductive spindle member extending axially through said toroidal cores, an electrically conductive casing enclosing said first and second toroidal cores and connected to the ends of said spindle member to form with said spindle member a single-turn winding linking said cores, and an additional single-turn winding on said first toroidal core, said additional winding having a center tap connected to said spindle member intermediate its ends, and a common conductor connected to said casing proximate the ends of said spindle member.

Claim 7

In a coupling transformer assembly, a first toroidal core fabricated of a material having a high magnetic permeability, second and third toroidal cores spaced apart from each other and disposed coaxially of said first toroidal core, a winding comprising a plurality of turns wound on said first core, an electrically conductive spindle member extending axially through said toroidal cores, an electrically conductive casing enclosing said first and second toroidal cores and connected to the ends of said spindle member to form with said spindle member a single-turn winding linking said cores, and an additional single-turn winding on said first toroidal core, said additional winding having a center tap connected to said spindle member intermediate its ends, and a common conductor connected to said casing proximate the ends of said spindle member.

Claim 8

In a coupling transformer assembly a first toroidal core fabricated of a material having a high magnetic permeability, second and third toroidal cores spaced apart from each other and disposed coaxially of said first toroidal core, a winding comprising a plurality of turns wound on said first core, an electrically conductive spindle member extending axially through said toroidal cores, and an electrically conductive casing enclosing said first and second toroidal cores and connected to the ends of said spindle member to form with said spindle member a single-turn winding linking said cores, said spindle member including a cylindrical central portion, a pair of cylindrical end portions of smaller diameter than said central portion, and an annular recess formed in each end of said central portion adjacent said end portions, said first toroidal core being disposed over said central portion and said second and third toroidal cores being disposed over said end portions and in said annular recesses.

Claim 9

In a coupling transformer assembly a first toroidal core fabricated of a material having a high magnetic permeability, second and third toroidal cores spaced apart from each other and disposed coaxially of said first toroidal core, a winding comprising a plurality of turns wound on said first core, an electrically conductive spindle member extending axially through said toroidal cores, and an electrically conductive casing enclosing said first and second toroidal cores and connected to the ends of said spindle member to form with said spindle member a single-turn winding linking said cores, said spindle member including a cylindrical central portion, a pair of cylindrical end portions of smaller diameter than said central portion, and an annular recess formed in each end of said central portion adjacent said end portions, said first toroidal core being disposed over said central portion and said second and third toroidal cores being disposed over said end portions and in said annular recesses.

Claim 10

In a transformer assembly, a first toroidal core fabricated of a material having a high magnetic permeability, a second toroidal core of smaller size than said first toroidal core disposed coaxially of said first core, a winding comprising a plurality of turns wound on said first core, an electrically conducTive spindle member extending axially through the cores, said spindle member including a cylindrical central portion and a cylindrical end portion of smaller diameter than said central portion, said first toroidal core being disposed over said central portion and said second toroidal core being disposed over said end portion, and an electrically conductive casing enclosing said first and second toroidal cores, said casing being connected to the ends of said spindle member to form with said spindle member a single-turn winding linking said cores.

Claim 11

In a transformer assembly, a first toroidal core fabricated of a material having a high magnetic permeability, a second toroidal core of smaller size than said first toroidal core disposed coaxially of said first core, a winding comprising a plurality of turns wound on said first core, an electrically conducTive spindle member extending axially through the cores, said spindle member including a cylindrical central portion and a cylindrical end portion of smaller diameter than said central portion, said first toroidal core being disposed over said central portion and said second toroidal core being disposed over said end portion, and an electrically conductive casing enclosing said first and second toroidal cores, said casing being connected to the ends of said spindle member to form with said spindle member a single-turn winding linking said cores.

Claim 12

A transformer assembly as in claim 7 wherein the central portion of said spindle member is formed to include an annular recess adjacent to the end portion of said spindle member, said second toroidal core being disposed in said recess.