| 摘要 |
The needles of a knitting machine are selectively actuatable upon passing by electro-magnetic selection members. A tape carrying a program for controlling selection of the needles is driven past a reader which supplies information in the form of electrical signals to a memory. The signals are extracted from the memory at the frequency of passage of the needles past the selection members, and supplied to the selection members to select the needles. The speed of driving the tape is servo-controlled as a function of the quantity of information in the memory whereby the rate of reading information on the tape need not be synchronized with the frequency of passage of the needles past the selection members. This facilitates use of a two-ended tape alternately wound and unwound from one spool to another. The tape can also carry information for controlling reversal of tape driving means and for selectively reading the principal information according to the direction of motion thereof.
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