Rotary electric cable coupling

Claim 1

AN ANTIFRICTION CABLE COUPLING FOR CONNECTING TWO RELATIVELY REVOLVING MULTIPLE LEAD MEMBERS, SAID COUPLING COMPRISING AN OUTER AND AN INNER SUBSTANTIALLY CYLINDRICAL MEMBER CONSISTING OF DIELECTRIC MATERIAL AND ARRANGED CONCENTRICALLY ONE WITHIN THE OTHER RADIALLY SPACED APART TO DEFINE AN ANNULAR CHAMBER THEREBETWEEN; TWO ANTIFRICTION BEARINGS OF THE DEEP-GROOVE BALL RACE TYPE ADAPTED TO SUSTAIN HIGH RADIALLY AND AXIALLY DIRECTED LOADS, SAID BEARINGS BEING DISPOSED BETWEEN SAID CYLINDRICAL MEMBERS ONE AT EACH END OF SAID CHAMBER; A PLURALITY OF CURRENT TRANSMITTING MEANS, CORRESPONDING IN NUMBER TO THE NUMBER OF LEADS OF SAID MEMBER TO BE CONNECTED BY SAID COUPLING, SAID CURRENT TRANSMITTING MEANS BEING DISPOSED IN THE CHAMBER INTERMEDIATE SAID ANTIFRICTION BEARINGS, EACH OF SAID CURRENT TRANSMITTING MEANS COMPRISING A FIRST AND A SECOND ANNULAR CONTACT ELEMENT, THE FIRST CONTACT ELEMENT BEING MOUNTED ON SAID OUTER CYLINDRICAL MEMBER AND THE SECOND CONTACT ELEMENT BEING MOUNTED ON SAID INNER CYLINDRICAL MEMBER, AT LEAST ONE OF SAID CONTACT ELEMENTS BEING FORMED OF RESILIENT CONDUCTIVE MATERIAL; AND A PLURALITY OF ANTIFRICTION CURRENT CONDUCTORS DISPOSED BETWEEN EACH PAIR OF SAID CONTACT ELEMENTS AND URGED INTO ROLLING CONTACT ENGAGEMENT WITH THE RESPECTIVE CONTACT ELEMENTS DUE TO THE RESILIENCY OF SAID ONE CONTACT ELEMENT.