A flexible core for a hand-held device such as a flashlight includes a pair of conductive wires which electrically connect a source of power to a power using implement. A flexible spine surrounds the pair of conductive wires and includes a plurality of interconnected universally rotatable members. A...http://www.google.co.uk/patents/US5521803?utm_source=gb-gplus-sharePatent US5521803 - Flashlight with flexible core
