US Patent 8053042 Artificial tree apparatus

An artificial tree apparatus having a plurality of tree trunk segments that couple together to provide electrical power to receptacles on each of the segments. An electrical line is connected to a first trunk segment electrical connector, such that when the first trunk segment is brought into juxtaposition with the second trunk segment, a detent on the first trunk segment can be brought into alignment with and slidably engage with a guide slot on the second trunk segment to permit connection of the first trunk segment electrical connector (socket) with the second trunk segment electrical connector (plug). The recessed location of the plug on the second segment protects the plug prongs, and connection with the corresponding socket on the first segment is only possible when the detent on the first segment has been aligned with the guide slot on the second segment.