A cable retraction system is described which includes a windup reel (16) and power springs (24, 26, 28) that urge the reel to turn and wind up a signal-carrying cable (20). An outer end (25) of each power spring is bent about 180.degree. to form a hook that projects through a slot (72) in a windup drum...http://www.google.ca/patents/US5453585?utm_source=gb-gplus-sharePatent US5453585 - Cable retraction system
