Embodiments of the present invention provide a system (10) operable to provide power and control through a rotating interface. The system (10) generally includes a control unit (12) and a distributor unit (14). The control unit (12) is operable to generate a power signal having a plurality of power transitions....http://www.google.com/patents/US7602081?utm_source=gb-gplus-sharePatent US7602081 - System and method for providing power and control through a rotating interface
