Device for selecting needles in a circular knitting machine, in particular for stockings

Device for selecting needles in a circular knitting machine, in particular for stockings, comprising a plurality of superimposed selection levers individually pivoted at an intermediate portion thereof to a supporting structure, said selection levers each having one of its ends facing the needle-bearing cylinder in the region of the selectors and being oscillable in a selection plane from a first position, whereat said end is at an intermediate level between the heels of the selectors so as to not interfere therewith, to a second position, whereat said end is at the level of the heels of the selectors so as to interfere therewith, an actuating lever being provided for each selection lever, acting on the opposite end of said selection lever with respect to said selectors for its passage from said first position to said second position, wherein said actuating lever has at an intermediate portion thereof a fulcrum, said actuating lever being pivoted at said fulcrum to a frame and controllably oscillable in an actuation plane, and wherein said device comprises two electromagnets arranged on opposite sides with respect to said fulcrum of said actuating lever, said electromagnets having cores and being selectively activatable for causing oscillation of said actuating lever, wherein said actuating lever has at least two expansions, said expansions extending substantially parallel to each other and towards said cores of said electromagnets.

Device for selecting needles in a circular knitting machine, in particular for stockings, comprising a plurality of superimposed selection levers individually pivoted at an intermediate portion thereof to a supporting structure, said selection levers each having one of its ends facing the needle-bearing cylinder in the region of the selectors and being oscillable in a selection plane from a first position, whereat said end is at an intermediate level between the heels of the selectors so as to not interfere therewith, to a second position, whereat said end is at the level of the heels of the selectors so as to interfere therewith, an actuating lever being provided for each selection lever, acting on the opposite end of said selection lever with respect to said selectors for its passage from said first position to said second position, wherein said actuating lever has at an intermediate portion thereof a fulcrum, said actuating lever being pivoted at said fulcrum to a frame and controllably oscillable in an actuation plane, and wherein said device comprises two electromagnets arranged on opposite sides with respect to said fulcrum of said actuating lever, said electromagnets having cores and being selectively activatable for causing oscillation of said actuating lever, wherein said frame has a base portion, at least one central portion, and at least two other portions, said central portion and said two other portions extending parallel to each other from said base portion of said frame, said central portion oscillably supporting said actuating lever, said other two portions defining said cores of said electromagnets, said actuating lever having at least two expansions, said expansions extending substantially parallel to each other and towards said cores of said electromagnets.