Patent ID: 7825544

Claim:
A coupling device comprising at least first and second mutually complementary magnetic cores configured to form in operation a magnetic circuit, said magnetic circuit being provided with a first set of electrical windings for magnetically coupling a first electrical signal through the device by way of a first magnetic path in the circuit, said circuit being provided with a second set of electrical windings for magnetically coupling a second electrical signal through the device by way of a second magnetic path in the circuit, said first and second paths partially spatially intersecting, said first and second sets of windings being configured so that: (a) the first set of windings is substantially sensitive to magnetic flux established in operation in the first magnetic path, and substantially insensitive to magnetic flux established in operation in the second magnetic path; and (b) the second set of windings is substantially sensitive to magnetic flux established in operation in the second magnetic path, and substantially insensitive to magnetic flux established in operation in the first magnetic path; and wherein said at least first and second magnetic cores are configured so as to enable in operation relative motion there between with their associated windings whilst magnetically coupling said first and second signals through the circuit.