Overhead transmission line with communication core

Claim 1

An overhead transmission line comprising, in combination: a coaxial line element composed of a central conductor and an insulating sheath concentrically surrounding said central conductor; a plurality of power current conductors of circular cross section presenting electrically conductive surface portions and disposed around said coaxial line element in such a manner, that adjacent current conductors contact one another and said insulating sheath, the surface regions of said power conductors which face said sheath together defining a cage-like return conductor enclosing said central conductor, said coaxial line element and return conductor together defining a communications core; high frequency choke means connecting said central conductor to said power current conductors in a manner to establish a short circuit with respect to the alternating current frequency of the power to be transmitted by said current conductors; and coupling means including a blocking capacitor and a decoupling transformer connected to said central conductor for coupling said central conductor into a communications system.