Grounding wiring device

Claim 1

A GROUNDING WIRING DEVICE COMPRISING AN INSULATIVE HOUSING HAVING A PAIR OF POWER PRONG SLOTS AND A GROUNDING PRONG SLOT IN ONE FACE WALL THEREOF FOR INSERTION OF PLUG POWER PRONGS AND A PLUG GROUNDING PRONG INTO ENGAGEMENT WITH RESPECTIVE ALIGNED POWER AND GROUNDING CONTACTS SUPPORTED IN THE WIRING DEVICE, INSULATIVE MEANS PIVOTABLE IN A PLANE GENERALLY PERPENDICULAR TO THE PRONG INSERTION DIRECTION, SAID INSULATIVE MEANS INCLUDING A PAIR OF JUXTAPOSED ELONGATED INSULATIVE MEMBERS HAVING RESPECTIVE BARRIER PORTIONS NORMALLY LOCATED TO BLOCK INSERTION OF POWER PRONGS THROUGH SAID POWER PRONG SLOTS, SAID INSULATIVE MEMBERS ALSO HAVING RESPECTIVE CONFRONTING BUT SPACED CAM PORTIONS NORMALLY LOCATED IN ALIGNMENT WITH SAID GROUNDING PRONG SLOT AND DISPOSED TO ENGAGE SAID GROUNDING PRONG UPON INSERTIONAL MOVEMENT OF THE LATTER THEREBETWEEN SO AS TO URGE SAID BARRIER PORTIONS PIVOTALLY OUT OF THEIR NORMAL BLOCKING POSITIONS AND TO OPEN SAID POWER PRONG SLOTS, AND MEANS FOR SUPPORTING SAID INSULATIVE MEMBERS FOR OPERATION IN THE MANNER DESCRIBED, SAID SUPPORTING MEANS INCLUDING A COIL SPRING ENGAGING AND EXTENDING BETWEEN SAID INSULATIVE MEMBERS SO AS NORMALLY TO URGE THE LATTER INTO THEIR BLOCKING POSITIONS, SAID SUPPORTING MEANS ALSO INCLUDING A PIVOT ELEMENT DISPOSED BETWEEN SAID CAM PORTIONS AND SAID BARRIER PORTIONS AND ABOUT WHICH RESPECTIVE CONFRONTING ARCUATELY SURFACED PORTIONS OF SAID INSULATIVE MEMBERS PIVOT.