Method for producing an incandescent light source and light source obtained according to such method

Abstract

A method is described for producing a light source comprising a complex of filaments able to emit light by incandescence when powered by an electrical current. The method includes a step of extending a single uninterrupted wire along a complex path defined by a plurality of positioning elements positioned remotely from each other, the path being such that segments of the uninterrupted wire that extend from different positioning elements mutually cross each other.

1 . A method for producing a light source comprising a complex formed by a plurality of filaments able to emit light by incandescence when powered by an electrical current, the method including a step of extending a single uninterrupted wire along a complex path defined by a plurality of positioning elements positioned remotely from each other, the path being such that segments of the uninterrupted wire that extend from different positioning elements mutually cross each other.  
     
     
         2 . The method as claimed in  claim 1 , wherein, during said step of extending, the uninterrupted wire is maintained under tension along the complex path by tensioning means.  
     
     
         3 . The method as claimed in  claim 1 , wherein on the complex connections are obtained at least in areas in which the uninterrupted wire crosses itself along the complex path.  
     
     
         4 . The method as claimed in  claim 3 , wherein the connections are achieved by means of a moulding operation.  
     
     
         5 . The method as claimed in  claim 4 , wherein during the moulding operation the complex is positioned between an upper planar element and a lower planar element provided with respective through cavities, the through cavities of the two planar elements being substantially aligned axially to each other and an element for closing the aligned cavities is positioned below the lower planar element, in correspondence with the aligned through cavities being positioned areas in which the uninterrupted wire crosses itself, into the cavity being poured material used to achieve the connections.  
     
     
         6 . The method as claimed in  claim 4 , wherein after the moulding operation excess segments of the uninterrupted wire are eliminated.  
     
     
         7 . The method as claimed in  claim 1 , wherein the single wire is arranged in such a way as to travel more than once over a same path.  
     
     
         8 . The method as claimed in  claim 3 , wherein the connections are obtained using respective agglomerations of carbon nanotubes.  
     
     
         9 . The method as claimed in  claim 8 , wherein the carbon nanotubes are at least partially ordered with respect to each other.  
     
     
         10 . The method as claimed in  claim 1 , wherein the uninterrupted wire is constituted by a material of tungsten or a tungsten-based metallic alloy.  
     
     
         11 . The method as claimed in  claim 5 , wherein the excess segments are eliminated by means of a laser cutting operation.  
     
     
         12 . A light source obtained with the method as claimed in  claim 1 , comprising a complex formed by a plurality of filaments able to emit light by incandescence when powered by an electrical current, the complex being formed by a single uninterrupted wire arranged according to a complex path.  
     
     
         13 . The light source as claimed in  claim 12 , wherein the complex comprises connections at least in areas in which the uninterrupted wire crosses itself along the complex path.  
     
     
         14 . The light source as claimed in  claim 13 , wherein the connections are obtained by agglomerations of carbon nanotubes.  
     
     
         15 . The light source as claimed in  claim 12 , wherein the filaments are mutually connected according to a series-parallel configuration.  
     
     
         16 . The light source as claimed in  claim 12 , wherein the filaments are mutually connected according to a parallel-series configuration.  
     
     
         17 . The light source as claimed in  claim 12 , wherein the filaments are mutually connected according to a net configuration.