The present invention relates to a multi-functional lamp structure for all kinds of lamps, having a hanger and an electric connector; a limit structure, pivotally coupled to the hanger, has male/female limit elements that can be extended outward by expanding the spring and pulling the draw bar; when...http://www.google.fr/patents/US6653560?utm_source=gb-gplus-shareBrevet US6653560 - Multi-functional do-it-yourself lamp structure
