DOOR LOCK (MODIFICATIONS) Russian patent published in 2002 - IPC

FIELD: locksmith's work. SUBSTANCE: the door lock has a log body accommodating the cross-bars of the locking bolt and a secrecy mechanism for the tubular key, having a central rod rigidly coupled to the bush of the swinging mechanism, the central rod restricts the radial movement of the locking members in the direction to the central axis, the central rod in the same plane in the circumference has radial holes, each accommodating a single ball, and the quantity of these holes and the diameter of the balls are so selected that, being pressed to one another, they project above the surface of the central rod forming a baffle, whose diameter does not exceed the diameter of the inner hole of the tubular key, the bush prevents these balls from falling-out when the key is removed. EFFECT: enhanced resistance to breaking open. 2 cl, 3 dwg