(57) For selectively controlling yarn feeding fingers (2) in a circular knitting machine
the yarn feeding fingers (2) whereof are individually pivoted to a stationary structure
(4) and movable between a rest position and an operative one, with the drive ends
(2b) of the feeding fingers (2) there are associated respective electromagnets (11)
the movable armatures (12) whereof act as by thrust application on the respective
drive ends (2b) of the yarn feeding fingers (2). The selective energization of the
various electromagnets (11) is accomplished through a memory device driven by a photoelectric
unit located astride a disk formed with peripheral notches and made rigid with the
machine main drum. Each forward step movement of the drum results in the sending of
one or more pulses from the photoelectric unit to the memory device, wherein the knitting
program is stored such that for each pulse or number of pulses there correspond an
energization or de-energization control impulse to a given electromagnet (11).
|
|
