Device for regulating the length of the string of a necklace

Abstract

A device is provided capable of regulating the length of the string of a necklace of the type provided with a chain or other filiform element for support of a pendant for ornamental use produced in the jewelry field and costume jewelry such for example a “collino” which is a thin chain to be used around the neck on which a little medal or a little cross can be hanged, a bracelet, an earring and similar products. The device has a particular conformation of the means capable of regulating in the desired manner the length of the chain or the other filiform structure.

What is claimed is:  
     
         1 . A device capable of regulating the length of the string of a necklace of the type provided with a chain or other filiform element for supporting a pendant, for ornamental use, produced in the jewelry field and in the field of costume jewelry including a “collino”, which is a thin chain to be used around the neck to which a little medal or a little cross can be hanged on a chain for the neck, a bracelet, an earring and similar products, characterized by the fact that the device comprises two semishells ( 2 , 3 ) which are located one opposite to the other and partially interpenetrating, said semishells forming button ( 1 ), on the lateral wall of each semishell being placed at least one pair of openings ( 4 , 5 ), said openings being coaxial and diametrically opposite, said semishells being reciprocally mounted in such a manner that the openings of one semishell mate with the openings of the other semishell, whereby passage is allowed between them of the filiform or chain ( 6 ), an elastic contrast element ( 7 ) being located in the interior of said semishells, said elastic element being mounted precompressed and having the ability of pushing towards the exterior said two semishells, whereby they distance one from the other.  
     
     
         2 . The device according to    claim 1    characterized by the fact that the sliding or the reciprocal outdistancing of the two semishells ( 2 , 3 ) causes said openings ( 4 , 5 ) to lose their axial alignment, whereby a tendency to cutting and a deformation of the portion of the chain ( 6 ) engaged with the openings occur whereby friction force is developed, said force blocking said device on said chain.  
     
     
         3 . The device according to claims  1  and  2  characterized by the fact that it is positioned in a manner to cause the two portions ( 8 ) of the chain which are comprised between the pendant and the device to approach.  
     
     
         4 . The device according to claims  1  and  2  characterized by the fact that it is located on the body of the pendant ( 10 , 11 ).  
     
     
         5 . The device according to    claim 4    characterized by the fact that said pendant ( 11 ) is hollow whereby it may receive the portion of the chain ( 12 ) which is located under said button ( 1 ).  
     
     
         6 . The device according to one or more of the preceding claims characterized by the fact that it is made in every shape, dimension and material, precious and non-precious.