| 摘要 |
<p>A lock (10) and key (14, 14A) mechanism for doors (12) and the like, whereas the lock electromagnetically recognises a key (14, 14A) when inserted into its bore. The key barrels contain a random distribution of magnetic particles in a non-magnetic aggregate, and each key (14, 14A) is unique. The lock contains an induction coil (29) which outputs a code signal to a memory (22) device on insertion of a key (14, 14A). The memory (12) stores the outputs of newly-inserted keys (14, 14A) to allow future operation of the lock (10), and a key (14, 14A) can be cancelled from the memory (12) to prevent future operation of the lock (10) thereby.</p> |
