Original Publication Date: 1966-Mar-01
Included in the Prior Art Database: 2005-Mar-06
AbstractThis is a position sensor which accurately determines whether a jam has occurred in a pin insertion mechanism.
This is a position sensor which accurately determines whether a jam has occurred in a pin insertion mechanism.
Block 10 is a substrate into which conductive pins 12 are to be inserted. Pin insertion mechanism 14 performs this function by initially loading pin 12 into slotted cylinder 16 and then extending rod 18 to impel pin 12 into block 10. At times during the operation of this mechanism, pin 12 can jam. Such occurs either during its insertion into cylinder 16 or during the time when rod 18 is impelling it towards substrate 10. In order to sense a jam and prevent substrate 10 from being removed without its proper allotment of pins 12, a position sensing mechanism is attached to rod 18.
This mechanism includes magnet 20 which is pinned through slot 22 to rod 18 and is adapted to move with the rod. Reed switch 24 is positioned near the low point of travel of magnet 20. Switching elements within reed switch 24 have a highly reproducible switching point with a sensitivity to the position of magnet 20 that approaches several thousandths of an inch. Thus, if, as the result of a jam, the travel of rod 18 is restricted and magnet 20 does not come within a closely controlled distance of reed switch 24, the reed switch contacts do not close to allow the withdrawal of substrate 10.