DISK CYLINDER LOCK AND ITS KEY Russian patent published in 1998 - IPC

FIELD: disk cylinder locks and its keys. SUBSTANCE: lock has cylinder body which accommodates internal cylinder with a set of discs. The latter includes locking discs with recesses on their periphery to receive locking pin. Locking pin in lock closed position together with locking discs prevents cylinder turning with respect to body. Locking devices are installed for turning by key to open the lock. Guide member is located in key channel formed by holes of discs comprising the disc set passes along this set and is turned together with key. Hole of at least one locking disc has at least one projection directed to center of hole for key. Adjacent surfaces of projection are square to each other. One of them is code and engageable with code surface on key rod to ensure turning of at least one locking disc relative to cylinder in opening the lock, while the other surface of projection is made in the form of back surface of locking disc engageable with key rod by means of guide member for return of at least one locking disc to position of closed lock. EFFECT: higher lock combination. 8 cl, 7 dwg