Patent ID: 7280032

Claim:
Apparatus for use in coupling power from a power supply to a device over a network transmission medium, the power supply having a first terminal and a second terminal, the network transmission line including first and second electrical conductors, the apparatus comprising: a first device having a first winding and a second winding, the first winding being electrically connected between the first terminal of the power supply and the first electrical conductor of the network transmission medium, the second winding being coupled between the first terminal of the power supply and the first electrical conductor of the network transmission medium; a second device having a first winding and a second winding, the first winding of the second device being electrically connected between the first terminal of the power supply and the second electrical conductor of the network transmission medium, the second winding of the second device being coupled between the first terminal of the power supply and the second electrical conductor of the network transmission medium; at least one core for coupling the first and second windings of the first device and for coupling the first and second windings of the second device; wherein the at least one core comprises a first core for coupling the first and second windings of the first device and for coupling the first and second windings of the second device.