| 摘要 |
<p>A device responsive to electrical control signals for influencing the operation of sewing machine stitch forming instrumentalities to produce predetermined stitch patterns. The device includes a whippletree adder mechanism of which the input arms are selectively influenced by solenoids responsive to the electrical control signals. A mechanical drive is provided from the sewing machine actuating mechanism effective during each stitch for shifting each input arm of the whippletree adder into fully actuated position, in which position the solenoids are selectively energized.</p> |
