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

FIELD: locksmith's work. SUBSTANCE: the lock has a body accommodating a door bolt and having a handle for opening the lock from inside, secrecy mechanism. The secrecy mechanism consists of a mechanism casing and a rotary bush fastened to which is the central rod, made in the mechanism casing and in the central rod, made in the mechanism casing and in the rotary bush are coaxial radial openings accommodating the members providing for locking-up of the lock both when the key is taken out and inserted if its code does not correspond to the mechanism code, used as the drive mechanism is a rack-and- gear drive consisting of a door bolt on which gears are cut, and a shaft-gear fastened to the handle, made on the end of the shaft-gear is a half-coupling engaged with the half-coupling positioned on the end of the central rod that may be disengaged at drawing-out of the handle, the handle serves as a permanent magnet that is attracted to the lock body, and the gear, members providing for locking-up of the lock, and the central rod are made of ferromagnetic material, besides, one or two distance sleeves are positioned between the handle and the gear. EFFECT: enhanced resistance to breaking open. 9 cl, 6 dwg