Patent ID: 8138634

Claim:
An automatic transfer switch, comprising: a transfer switch housing; at least two automatic transfer switch circuits mounted in the transfer switch housing; a first power input penetrating the transfer switch housing and being in power supply communication with a first one of the automatic transfer switch circuits and therethrough initially a first power outlet mounted in association with the transfer switch housing, the first power outlet being power supplying connectable to a first separate electronic device; and a second power input penetrating the transfer switch housing and being in power supply communication with a second one of the automatic transfer switch circuits and therethrough initially a second power outlet mounted in association with the transfer switch housing, the second power outlet being power supplying connectable to a second separate electronic device; the first one of the automatic transfer switch circuits comprising: at least a first relay in alternately switchable power supply communication with the first power input and second power input; and a first power input sensor in power determining communication with the first power input and in relay activation communication with the first relay; and the second one of the automatic transfer switch circuits comprising: at least a second relay in alternately switchable power supply communication with the second power input and first power input; and a second power input sensor in power determining communication with the second power input and in relay activation communication with the second relay.