LOCK WITH CHANGEABLE SECRECY AND ADDITIONAL STOPPAGE (MODIFICATIONS) Russian patent published in 2004 - IPC

FIELD: means for protection against breaking-in.

SUBSTANCE: level lock with a changeable secrecy may be used for closing of safes. The lock has a changeable rotating code drum locked by a permanent set of spring-loaded level locks, the code drum is coupled to a gear wheel coupled to the rack of the tail-piece of the locking bolts. Cavities and lugs for locking the tail-piece of the locking bolts by stoppage at every half turn of a double-bit key pressing out the stoppage by its bit when the tail-piece of the locking bolts gets released from stoppage, they are made alternating with the pitch matched with the pitch of the rack teeth for the key, and in a quantity matched with the quantity of the teeth of the rack for the key. In the modification of the invention the rotating code drum is coaxially fastened to a rotary disk fastened on a post and having a rack for the key. Additionally made on the rotary disk are cavities and lugs for locking the tail-piece of the locking bolts by stoppage at every half turn of a double-bit key pressing out the stoppage by its bit when the tail-piece of the locking bolts gets released from stoppage, they are made alternating with the pitch matched with the pitch of the rack teeth for the key, and in a quantity matched with the quantity of the teeth of the rack for the key. Cavities and lugs are additionally made on the tail-piece of the locking bolts set in translational motion by the rotary disk. In another modification the lock has a permanent set of spring-loaded level locks locking the replaceable stepped post of the tail-piece of the locking bolts, having a rack for the key, additionally made on the tail-piece of the locking bolts are cavities and lugs for locking the tail-piece of the locking bolts by stoppage at every half turn of a double-bit key pressing out the stoppage by its bit when the tail-piece of the locking bolts gets released from stoppage, they are made alternating with the pitch matched with the pitch of the rack teeth for the key, and in a quantity matched with the number of the teeth of the rack for the key.

EFFECT: prevented use of replaceable assembly blocks or parts at an enhanced resistance to criminal opening and simplified operation of change of the secrecy.

4 cl, 3 dwg