A time delay switch for use with an electrical load and a source of electrical power, including a multiple-position toggle switch and a user-programmable microchip. The toggle is movable among three positions: an "OFF" position, an "ON" position on one side of the OFF position, and a "TIMER" position...http://www.google.de/patents/US5473204?utm_source=gb-gplus-sharePatent US5473204 - Time delay switch
