KEY-OPERATED LOCKING DEVICE Russian patent published in 2005 - IPC

FIELD: electric permutation locks and circuits therefore.

SUBSTANCE: locking device has key 101 and autonomous lock 20. Key is provided with electronic circuit 101a having the first memory block 101b and the first output 101c. Lock 20 has electronic circuit 20a with the second memory block 20b and the second output 20c, arranged to cooperate with the first output 101c. Locking device also has blocking mechanism 20d which blocks the lock until legal key insertion into the lock. Memory block of the first key stores opened identification key attribute which determines group of keys having identical mechanical codes. Memory block of the key has a list of opened and secret attributes of legal keys, as well as a list of opened identifying attributes of illegal keys. Key is considered as legal one if opened and secret attributes thereof are present in list of legal keys, but opened identifying attribute is absent in the list of illegal keys.

EFFECT: increased simplicity of permission giving to locking devices and of providing the system with new keys.

21 cl, 6 dwg