Plug and socket connection

Claim 1

A PLUG AND SOCKET CONNECTION FOR ELECTRICAL CONDUCTORS COMPRISING, IN COMBINATION, A FIRST ONE PIECE ELONGATED MEMBER OF NONCONDUCTIVE MATERIAL HAVING AT ONE END THEREOF AN ANNULAR WALL FORMING A CAVITY, SAID ANNULAR WALL BEING FORMED WITH A PLURALITY OF ANGULARLY DISPLACED SLOTS EXTENDING FROM THE FREE EDGE OF SAID ANNULAR WALL PARTLY THROUGH THE LENGTH OF SAID WALL SO AS TO FORM TONGUES AND THE WALL THICKNESS OF SAID ANNULAR WALL INCREASING BY INCREASE OF THE OUTSIDE DIAMETER THEREOF, TOWARD THE FREE EDGE THEREOF; A SECOND ONE-PIECE ELONGATED MEMBER OF NONCONDUCTIVE MATERIAL HAVING AT ONE END THEREOF A HEAD HAVING AN END PORTION FITTING INTO SAID CAVITY OF SAID FIRST MEMBER, AND AT A GIVEN DISTANCE FROM THE FREE END OF SAID END PORTION, AN UNDERCUT PORTION OF A CROSS SECTION SMALLER THAN THAT OF SAID END PORTION; A SLEEVE HAVING A LENGTH CONSIDERABLY LONGER THAN THE LENGTH OF SAID ANNULAR WALL, SAID SLEEVE SURROUNDING SAID FIRST MEMBER AND BEING MOVABLE IN LONGITUDINAL DIRECTION WITH RESPECT THERETO BETWEEN A RETRACTED RELEASING POSITION IN WHICH AT LEAST SAID TONGUES OF INCREASED THICKNESS PROJECT BEYOND ONE END OF SAID SLEEVE AND AN ADVANCED LOCKING POSITION IN WHICH SAID ONE END OF SAID SLEEVE COINCIDES WITH SAID ONE END OF SAID FIRST MEMBER SO THAT, AFTER SAID HEAD OF SAID SECOND MEMBER IS PUSHED INTO SAID CAVITY OF SAID FIRST MEMBER, MOVEMENT OF SAID SLEEVE FROM SAID RETRACTED RELEASING POSITION TO SAID ADVANCED LOCKING POSITION WILL PRESS THE TONGUES OF INCREASED THICKNESS INTO SAID UNDERCUT PORTION OF SAID HEAD TO THUS SECURE SAID MEMBERS AGAINST DISPLACEMENT IN LONGITUDINAL DIRECTION WITH RESPECT TO EACH OTHER; AND A PAIR OF ELECTRICAL CONDUCTOR MEANS RESPECTIVELY EXTENDING THROUGH SAID FIRST AND SAID SECOND MEMBERS, SAID CONDUCTOR MEANS HAVING RESPECTIVELY COOPERATING END PORTIONS ESTABLISHING AN ELECTRICAL CONNECTION BETWEEN SAID CONDUCTOR MEANS WHEN SAID MEMBERS ARE SECURED TO EACH OTHER.