| 摘要 |
<p>Electronically controlled electromagnetic needle selection in the direction of rotation of the needle cylinder in a circular knitting machine, including of the reciprocating motion type, particularly for ladies' stockings, is obtained by using: - a cylinder (1) with needles (2) and elastic pusher jacks (5) housed in corresponding longitudinal tricks, each pusher jack (5) being provided with three butts, namely an upper butt (7) cooperating with a first ring cam (30) for its lowering into the selection position, an intermediate butt (8) which when in the selection position cooperates with a presser cam (35) in the centripetal direction, and a lower butt (9) provided in a position corresponding with a cam (40) for raising the pusher jack (5) to activate the corresponding needle; - a rim structure (12) fixed to the needle cylinder (1) and provided lowerly, in line with each pusher jack (5), with a radial horizontal groove (11) housing an elastic selector (10) having its foot (13) fitted onto the outer circumference of the rim structure and its head (17) underlying the foot (6) of the pusher jack (5) when this latter is in its rest position; - a selection electromagnet (20) interposed between two permanent retaining magnets (22, 23) and fixed under each horizontal elastic selector (10), said electromagnet (20) cooperating with said selector (10) when this latter is urged against the electromagnet by the foot (6) of the pusher jack (5) under the action of the lowering cam (30), in order to either select or not select the corresponding lower butt (9) of the pusher jack (5) after its intermediate butt (8) has passed along said presser cam (35).</p> |
