Patent ID: 6974347

Claim:
A pierceable common contact plate in the combined sockets of Christmas light comprising: a pair of first and second sockets combined together on their opened bottoms by an opened transverse portion, said sockets each having a hollow interior and an upper rim, a pair of semi-cylindrical grooves parallel formed in center of said opened transverse portion, a plurality retaining recesses symmetrically formed on two sides of said semi-cylindrical grooves and a pair of retaining slits in an inner side of front and back walls of said opened transverse portion for disposing a pair of inverse U-shaped common contact plates each of which has a pair of barbed vertical portions respectively inserted into the hollow interior of said sockets and a tip alternately formed on an outer edges of their transverse portions for respectively piercing into a pair of parallel arranged single wires which are disposed in said pair of semi-cylindrical grooves; a lid engaged with said opened transverse portion of said combined sockets having a pair of corresponding semi-cylindrical grooves in center of an inner side covering on top of said single electric wires and a plurality of retainers each having a triangular hook at free end symmetrically formed on inner side beside said corresponding semi-cylindrical grooves and respectively engaged within the retaining recesses of said combined sockets in a snap fitting; a pair of lamps respectively engaged into the upper rims of said sockets each having base, a bulb and a pair of lead-in wires attached to lateral peripheries of said base and engaged with the vertical portions of said inverse U-shaped common contact plates respectively.