US Patent 7952462 Remote controlled power switch

The invention provides a remote controlled power switch including a line interface, a radiation-based receiver and a processor. The line interface is electrically connected in series to a power line. The radiation-based signal receiver functions as receiving a radiation-based signal and converting the radiation-based signal into an operative code. And, the processor controls, based on the operative code, the line interface to cut off or provide transmission of electric power transmitted through the power line.