| 摘要 |
PCT No. PCT/SE80/00159 Sec. 371 Date Feb. 5, 1981 Sec. 102(e) Date Feb. 4, 1981 PCT Filed Jun. 4, 1980 PCT Pub. No. WO80/02711 PCT Pub. Date Dec. 11, 1980.An electronic lock of the type which can receive a plurality of electronic keys is disclosed. Each of the electronic keys has a unique key code associated therewith, one of the keys being a control key, the remaining keys being opening keys. The lock includes a read only memory for storing a control code corresponding to the key code associated with the control key and an erasable memory for storing a set of opening codes. The lock further including a control circuit which compares the key code of each key placed in the lock to both the control code and the opening codes. The control circuit opens the lock when the key code of a key placed in the lock corresponds to any one of the opening codes and changes the set of opening codes stored in the erasable memory when the control key and one of the opening keys are sequentially placed in the lock. |
