Patent ID: 7135972

Claim:
An anti-theft device; comprising at least one spool made of electrically insulating material that is mounted rotatably on a support; at least one cable that can be wound onto, and unwound from, said spool or a respective spool and has a free end that can be detachably anchored to an item to be restrained, elastic loading means for the or each spool in order to ensure the automatic tensioning and rewinding of said cable on its own spool, detachable engagement means for an item to be restrained which is located at said free end of said cable or of each cable and is suitable to open or close an electrical contact, and a control unit that is meant to act in response to the opening-closing of said electrical contact, wherein said detachable engagement means comprises a clamping element having two clamping jaws which are mutually articulated in order to pass from an engagement condition, in which said portion of said cable can move with respect to a first end, to a restraining condition, in which said portion of said cable is in a locking position and said electrical contact is closed.