1. A SWIVELED ELECTRICAL CONNECTOR COMPRISING TWO COAXIAL, GENERALLY CYLINDRICAL, CONTACT CARRYING MEMBERS OF RELATIVELY RIGID INSULATING MATERIAL FORMED WITH INTERABUTTING, ROTATABLY SLIDABLE, RADIALLY EXTENDING, INNER END SURFACES; A FIRST ELECTRICAL INTERCONNECTION BETWEEN SAID MEMBERS COMPRISING AN ANNULAR CONTACT ELEMENT OF CONDUCTIVE MATERIAL ENCIRCLING A FIRST OF SAID MEMBERS AND HAVING MEANS FOR FASTENING IT TO SAID FIRST MEMBER AND FOR CONNECTING A WIRE TO SAID CONTACT ELEMENT, AND A BORE IN THE OTHER OF SAID MEMBERS WITH ITS HEAD WITHIN RESILIENT, AXIALLY EXTENDING CONTACT FINGER OF CONDUCTIVE MATERIAL HAVING MEANS FOR CONNECTING AN ELECTRICAL CONDUCTOR THERETO AND FOR HOLDING ONE END OF SAID FINGER FIRMLY UPON THE EXTERIOR OF A SECOND OF SAID MEMBERS WITH SAID FINGERS OTHER END IN SLIDING, ELECTRICAL ENGAGEMENT WITH A RADIALLY OUTER SURFACE OF SAID ANNULAR CONTACT ELEMENT; AND A SECOND ELECTRICAL INTERCONNECTION BETWEEN SAID MEMBERS COMPRISING A CONDUCTIVE SLEEVE FIXED WITHIN A COAXIAL BORE IN ONE OF SAID MEMBERS, SAID SLEEVE HAVING MEANS FOR CONNECTING AN ELECTRICAL CONDUCTOR THERETO AND BEING FORMED WITH A RADIALLY INWARDLY EX-