| 摘要 |
A position sensor (10) includes a stationary frame (12) supporting a rotatable spool (20) onto which a cable (28) is wound in a plurality of individual windings (30). A distal end of the cable (28) extends through a lead guide (34) for attachment to an object whose position is desired to be sensed. As the object moves, the cable (28) is wound or unwound about the spool (20) and the spool (20) rotates in direct correlation to the movement of the object. The spool (20) is retained in the frame (12) through a threaded engagement between a threaded extension (22) extending from the spool (20) and a threaded opening in the frame (12). Thus, as the spool (20) rotates, the spool (20) travels along a linear path and a sensor (58) determines the location of the threaded extension (22) to determine the location of the object. A recoil spring (40) is used which may be located within the spool (20) itself. |
