| 摘要 |
A pair of superposed inclined feed tracks have slots along their upper and lower walls respectively. Elongate gates with inturned tips are disposed along the tracks and pivoted intermediate their ends on pins. A yoke having an axis intermediate the two pins has outward parallel fingers which are disposed outward of the pins, and as the yoke is turned by a rotary solenoid, first in one direction and then the other, the fingers engage the gates on opposite sides of their pivot pins oppositely and alternately to alternately open and close the respective tracks. A reciprocating pusher pushes the parts into the working ends of the upper and lower dies and a settable counter counts the strokes of the pusher. A circuit causes activation of the solenoid to shift the gates to switch the feed from one feed track to the other track when the counter registers up to the set number of strokes.
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