Abstract: A decorative chain formed from small hollow balls engaged by connection segments (103) is transformed by subjecting the small balls of the chain to deformations by beating; the chain is then articulated. The main faces (101A) of the deformed small balls (101) can be surface-treated by diamond engraving or satin-finishing or other surface treatments.

Abstract: A body (1) is machined in order to form: an axial cavity (5) for the stone the cavity having an edge (1B) that can be pressed over in order to anchor the stone; a lip (1E) that forms an abutment surface (1F) for resting against the surface of the laminar support (3) around a hole (4) formed in the support; adjacent to the lip (1E), a bearing section (9) that widens out and bears against the edge of the hole (4) in the support; and an elastic projection (11, 11A) that is joined to and extends from the section (9) and that can pass into the hole (4) and then re-expand so as to bear against the edge of the hole.

Abstract: Two annular elements (1, 5) are coupled so as to be slightly inclined in relation to one another and one inside the other, the internal annular element (1) has two external depressions (3) which are virtually diametrically opposite and essentially inclined in a symmetrical manner in relation to a diametral plane, for receiving and retaining the external annular element (5).

Abstract: Apparatus for predisposing, handling and assembling axial electronic components (C, P) (or other elements) on printed circuit cards and for equivalent uses, which includes cutting tools (34) and bending tools (88) for, respectively, cutting and bending the rheophores (R) as well as for retaining the shaped component, which all operate in a same and single station; its transfer to the operative station being carried out by the mobile hand of a robot whose body (50) carries some of said tools.