| 摘要 |
A punched card control system for an embroidery machine which has an embroidery creel and a drive mechanism for driving the creel includes a number of lifter rods each arranged to sense a corresponding hole in successive groups of holes punched in a card or tape, each group of holes representing an operating instruction for the embroidery machine. A feed mechanism advances the card past the lifter rods while each rod is in a rest position relative to the feed mechanism, so that the holes of each group are confronted by corresponding ends of the lifter rods. The feed mechanism then displaces the card a certain distance toward the rods so that those rods whose ends confront holes in the card remain stationary, while the remaining rods are contacted at their ends by the card which then moves these rods from their rest positions. A reading device including electrical switching elements responds to the position of each lifter rod and provides corresponding output signals over a number of line channels. A control device is coupled between the channels of the reading device and the embroidery creel drive mechanism, and activates the drive mechanism so that the embroidery creel is adjusted in accordance with the output signals from the reading device.
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