Abstract: Needle selection system for a circular machine for knitted fabrics, constituted by an assembly which comprises a series of movable elements correspondingly related to respective stationary elements, the movable assembly including a cylinder (2) with numerous longitudinal grooves (3) distributed on the exterior contour, with the incorporation, in each groove (3), of a needle (1) and three successive positionable elements (6), (11) and (17), which determine the movement of the needle (1); while the stationary part includes respective actuating cams (5), (10), (12) and (25), which determine the actuation of the abovementioned positionable elements of the movable portion, as a function of the revolution of the cylinder (2).

Abstract: Circular knitting machine for knitted fabrics, comprising an assembly of needles which are mounted in rotary needle beds provided with cam sections which act on the needles to conduct them selectively according to alternative trajectories, while the yarns to be knitted are delivered in each section in a selective manner by a programmable feed mechanism, which incorporates a complementary assembly which comprises a lever (40) which can be actuated in connection with a tiltable cam (42), which incorporates another associated lever (44) able to be positioned in order to effect the actuation of a rod (50) which actuates cutting and clamping of the yarn being fed, independently of the introduction of a new yarn substituting for the previous one.