Rotary electric cable coupling

Claim 1

AN ANTIFICATION CABLE COUPLING FOR TRANSMITTING CURRENT BETWEEN TWO RELATIVELY REVOLVCING MULTIPLE-LEAD MEMBERS, SAID COUPLING COMPRISING AN OUTER AND AN INNER SUBSTANTIALLY CYLINDRICAL INSULATION MEMBER ARRANGED CONCENTRICALLY ONE WITHIN THE OTHER RADIALLY SPACED APART TO DEFIE 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 CURRENTTRANSMITTING MEANS CORRESPONDING IN NUMBER TO THE NUMBER OF CABLE LEADS OF THE MEMBERS TO BE CONNECTED BY SAID COUPLING, SAID CURRENT-TRANSMITTING MEANS BEING DISPOSED BETWEEN SAID ANTIFRICTION BEARINGS, EACH OF SAID CURRENT-TRANSMITTING MEANS COMPRISING A FIRST AND A SECOND SLEEVE-SHAPED CONTACT ELEMENT, THE FIRST CONTACT ELEMENT BEING MOUNTED ON SAID OUTER CYLINDRICAL MEMBER AND HAVING A GREATER INSIDE DIAMETER THAN THE OUTSIDE DIAMETER OF THE SECOND CONTACT ELEMENT, SAID SECOND CONTACT ELEMENT BEING MOUNTED ON SAID INNER CYLINDRICAL MEMBER AND ARRANGED CONCENTRICALLY WITHIN SAID FIRST CONTACT ELEMENT; A PLURALITY OF METAL ROLLERS FOR TRANSMITTING CURRENT DISPOSED BETWEEN SAID CONTACT ELEMENTS, SAID FIRST CONTACT ELEMENT BEING MADE OF RESILIENT MATERIAL AND HAVING OF SLOT EXTENDING THROUGH ITS WALL, THE INSIDE DIAMETER OF SAID FIRST CONTACT ELEMENT BEING LESS THAN THE SUM OF THE OUTSIDE DIAMETER OF SAID SECOND CONTACT ELEMENT PLUS TWICE THE DIAMETER OF SAID ROLLERS, THEREBY RESILIENTLY URGING SAID ROLLERS INTO ROLLING CONTACT ENGAGEMENT WITH SAID CONTACT ELEMENTS.