Patent ID: 7232972

Claim:
A line switch able to modulate light comprising an upper cover, a lower cover and a rotary selector: said upper cover having its opposite inner sides respectively receiving a conducting terminal, each said conducting terminal formed with a pointed piercing member extending downward to pierce into a power conducting wire positioned in said lower cover; and, said rotary selector provided with a ratchet formed with six contact portions that constitute three pairs of two symmetrical contact portions, said ratchet bored with an accommodating groove for receiving a diode that has function of half-wave rectification and its opposite sides respectively welded thereon with a metal plate extending downward, said two metal plates of said diode respectively positioned on a first pair of said two symmetrical contact portions of said ratchet, a straight-through conducting member positioned crossing over said diode and assembled on a second pair of said two symmetrical contact portions of said ratchet, said rotary selector positioned between said upper cover and said lower cover, said ratchet of said rotary selector having its contact portions facing said upper cover; said line switch being under an OFF condition when said conducting terminals contact with a first pair of said two symmetrical contact portions of said ratchet that have no conducting member provided thereon, said line switch modulating light to be half bright when said rotary selector is turned clockwise to let said conducting terminals contact with said two metal plates of said diode that has function of half-wave rectification, said line switch modulating light to be fully bright when said rotary selector is further continuously turned clockwise until said conducting terminals contact with said straight-through conducting member.