A swivel apparatus couples an electrical conductor connected to an electrical device, such as a hand held, bar code scanner. The swivel apparatus includes a housing with a first end portion fixedly connectable to an electrical device and a freely movable second end portion. The second end portion rotates...http://www.google.com/patents/US5092793?utm_source=gb-gplus-sharePatent US5092793 - Swivel apparatus providing strain relief for an electrical conductor
