Electrical plug and socket connectors

Claim 1

FOR USE TO CONNECT ELECTRICALLY WITH A SOCKET HAVING AN INTERNAL ANNULAR RECESS, A METALLIC PLUG HAVING A PLURALITY OF DETENT PROJECTIONS OR RESILIENT COOPERATION WITH SAID RECESS TO RETAIN THE PLUG IN THE SOCKET, SAID PROJECTIONS BEING OFFSET FROM ONE ANOTHER ALONG THE INSERTION AXIS OF THE PLUG FOR SEQUENTIAL DEPRESSION THEREOF UPON INSERTION AND WITHDRAWAL OF THE PLUG INTO AND FROM THE SOCKET, THE MAXIMUM AXIAL SPACING OF THE PROJECTIONS BEING LESS THAN THE WIDTH OF THE RECESS IN WHICH IT IS INTENDED TO ENGAGE, EACH PROJECTION DEFINING A TAPERED SURFACE INCLINED TOWARDS THE LONGITUDINAL AXIS OF THE PLUG IN THE INSERTION DIRECTION THEREOF WHICH MERGES INTO ANOTHER TAPERED SURFACE EXTENDING IN AN OPPOSITE DIRECTION WITH RESPECT TO SAID FIRST-MENTIONED TAPERED SURFACE, THE INCLINED SURFACE OF THE PROJECTION NEAREST THE INSERTION END OF THE PLUG ADAPTED TO WEDGINGLY ENGAGE AN INTERIOR WALL PORTION OF THE SOCKET ADJACENT SAID RECESS, THE OTHER TAPERED SURFACE OF THE OTHER PROJECTION ADAPTED TO ENGAGE SAID RECESS.