Patent attributes
A socket for an electric plug comprising a housing, a first and second pin receptacles, and a shutter mechanism comprising a first and second shield elements,the first and second shield elements, each comprising a detent, and are being joined together by a flexible member,the shutter mechanism being slidingly movable along an axis and also so as to be rotatable about an axis perpendicular to the sliding movement,the shutter mechanism comprising a biasing means for biasing the shutter mechanism into the first position,wherein insertion of only one pin into the first or second pin receptacle so as to contact the first or second shield element causes the shutter mechanism to rotate about the axis perpendicular to the sliding movement bringing the detent of either the first or second shield element into engagement with the housing preventing movement of the shutter mechanism into the second position.