| 摘要 |
A nut (200) travelling on the thread (215) of a screw (100) forms a jack. An electrical probe (300) is located within the nut with the tip adjacent to the screw thread. The probe consists of a conductor (310) within an insulating sheath (320) and is connected (350) to an external generator. When significant wear takes place on the nut, contact is made with the screw and the wear is detected |
