| 摘要 |
A selection mechanism for a knitting machine of the type having individually movable needles provided or associated with selection butts at two or more levels, comprising at least one pair of superimposed permanent magnets, having a common pole piece between them to which opposite pole faces of the magnets are directed, individual pole pieces extending from the other faces of the magnets to form electromagnetic selectors at two different butt levels closely spaced on either side of the common pole piece, and selector coils on the said individual pole pieces adapted to be individually pulsed to divert the magnetic field of the permanent magnet in the pole piece so as to negate its effect on the butts.
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