| 摘要 |
<p>The system has ratchets (2) for locking a locknut (A) on a grooved support (B) such as stud or bolt, in a utilization position. Housings are formed in the locking nut to receive the ratchets, springs (4) and pins that serve as axles (3). A key is supported on a projecting end of one of the ratchets so as to unlock the ratchets. The locking nut and the grooved support are made of wood, plastics or non-ferrous metals.</p> |
