Method and device for needle-by needle selection in a circular knitting machine by means of elastic selectors

摘要

A circular knitting machine in which the inactivation or activation of the vertical jack (3) below each needle (2) is determined by a flexible fork (14) located radially to the cylinder within a ring structure (12) completely surrounding the machine cylinder and rigid therewith, and provided with a number of forks (14) and radial grooves (13) equal to the number of needles (2), said forks (14) being able to flex within said grooves (13) and being selected one by one by permanent retention magnets (17) provided with coils (23,24) providing opposition when energized and mounted on the ring structure; those magnets which are not opposed maintain the relative fork (14) in a position of non-interference with the vertical jack (3) which is therefore able to rise to activate the corresponding needles (2), whereas those magnets of which the opposition coils are energized release the forks (14) into a position of interference with the corresponding jacks (3), to thus inactivate the needles (2).