Supporting of electric cables whilst travelling in the direction of their length

Claim 1

IN THE MANUFACTURE OF AN ELONGATED CABLE AS HEREINBEFORE DEFINED BY A METHOD WHICH INVOLVES APPLICATION OF AN OUTER COVERING MATERIAL TO AN ELONGATED CONDUCTOR BY A HORIZONTAL EXTRUSION PLANT AND TREATMENT TO STRENGTHEN THIS EXTRUDED OUTER COVERING BY RUNNING THE CABLE IN THE DIRECTION OF ITS LENGTH WITH A HORIZONTAL COMPONENT OF TRAVEL THROUGH A TREATMENT VESSEL WHICH HAS A BASE WALL, THE IMPROVEMENT CONSISTING OF IMPARTING SUPPORT TO THE CABLE BETWEEN THE EXTRUSION PLANT AND A POSITIVE SUPPORT BY ARRANGING FOR THE CABLE RUNNING THROUGH THE TREATMENT VESSEL TO PASS THROUGH A UNI-DIRECTIONAL MAGNETIC FIELD WHOSE DIRECTION IS SUBSTANTIALLY HORIZONTAL AND TRANSVERSE TO THE DIRECTION OF TRAVEL OF THE CABLE AND BY CONTINUOUSLY PASSING A UNI-DIRECTIONAL ELECTRIC CURRENT ALONG THE CONDUCTOR, THE STRENGTH OF THE MAGNETIC FIELD AND THE MAGNITUDE AND DIRECTION OF THE CURRENT IN THE CONDUCTOR BEING SUCH THAT THE VERTICAL COMPONENT OF THE RESULTING MAGNETIC FORCE EXERTED ON THE CABLE OPPOSES THE GRAVITATIONAL FORCES THEREON TO AN EXTENT TO MAINTAIN THE CABLE OUT OF CONTACT WITH THE BASE WALL OF THE TREATMENT VESSEL WITHOUT THE NEED TO MAINTAIN THE ADVANCING CABLE UNDER HEAVY TENSION.