Patent ID: 6947271

Claim:
A power port for connecting a plug of an electrical device to an electrical circuit, the power port comprising: a substantially cylindrical receptacle in electrical connection with the circuit; a substantially cylindrical sleeve for receiving the plug therein, the sleeve being rotatably mounted within the receptacle with an insulative radial spacing from the receptacle; and a positive temperature coefficient (PTC) region located on a portion of an outer surface of the sleeve in the insulative spacing and conductively sandwiched between the sleeve and an inner surface of the receptacle to conduct electrical current therebetween under normal circuit conditions and to substantially block the electrical current therebetween when an overcurrent condition occurs, the receptacle having a non-conductive window on a portion of its inner surface and the PTC region being circumferentially aligned with the non-conductive window so as to be rotatable into and out of the non-conductive window.