Electrical wiring device having improved contact-terminal means

Claim 1

IN AN ELECTRICAL WIRING DEVICE HAVING AN INSULATING BODY INCLUDING THEREIN A CONTACT CHAMBER AND A TERMINAL CAVITY SPACED LATERALLY FROM SAID CONTACT CHAMBER, A TERMINAL COMPRISING A FACE WALL MEMBER DEFINING AN INTERNALLY THREADED OPENING THERETHROUGH, A BACKING MEMBER DISPOSED IN SUBSTANTIALLY PARALLEL RELATIONSHIP TO SAID FACE MEMBER BUT SPACED THEREFROM, AND RETAINING MEANS INTERCONNECTING SAID FACE AND BACKING MEMBERS AND DEFINING A WIRE RECEIVING OPENING INTERMEDIATE SAID MEMBERS; SAID RETAINING MEANS DEFINING SCREW THREADED PORTIONS COMPRISING A CONTINUATION OF THE THREADS IN SAID THREADED OPENING; AN AXIALLY MOVABLE SCREW PLUG MOUNTED IN SAID THREADED OPENING AND ARRANGED FOR MOVEMENT TOWARD AND AWAY FROM SAID BACKING MEMBER TOTALLY WITHIN THE CONFINES OF SAID TERMINAL; AND AN INTEGRAL U-SHAPED ELECTRICALLY CONDUCTIVE CONTACT MEMBER MOUNTED IN SAID WIRING DEVICE BODY AND INCLUDING A CONTACT PORTION DISPOSED IN SAID CHAMBER AND A TERMINAL PORTION EXTENDING INTO SAID WIRE RECEIVING OPENING ADJACENT SAID BACKING MEMBER; SAID SCREW PLUG BEING ARRANGED FOR SELECTIVE ADVANCEMENT TOWARD SAID BACKING MEMBER TO FORCE AND CLAMP A WIRE INSERTED IN SAID WIRE RECEIVING OPENING AGAINST SAID CONTACT MEMBER TERMINAL PORTION.