Abstract: A light level controlled electrical extension socket comprising a main body on which is formed two pairs of insertion sockets for receiving an appliance's power plug, a photosensitive element externally mounted in a housing on the main body, an extension cord attached to a power outlet, and a pair of indicator lights for each respective pair of insertion sockets. Each insertion socket comprises three receiving slots, whereby, a power plug inserted to the right side always receives power as in a convention adapter. A power plug inserted to the left side has its power turned on or off automatically according to prevailing light levels. A first pair of insertion sockets has its power on in automatic mode, i.e. the left side when the second pair has its power turned off, and vice versa. The indicator lights for each corresponding pair of insertion sockets reflect the status of each respective pair.

Abstract: A revolving safety socket of the present invention has a uniquely-designed stand, which serves as a switching device. It consists mainly of a circular hole in the case cover and a circular recess in the case base. Located between the circular hole and the circular recess is a revolving stand having receptacles therein. When the socket is not in use, the conductive member of the revolving stand is not in contact with the copper clip which is connected to the power supply. Only when a plug is inserted into the revolving stand, which is then rotated for a 90-degree angle, would the conductive member become engaged with the copper clip to permit the power supply to be on. Additionally, the socket has the reversed L-shaped fasteners to hold the protruded block of the plug firmly in place, ensuring that the plug can not be accidentally pulled out of the socket.