LEVER-TYPE LOCK WITH CODE DRUM (MODIFICATIONS) Russian patent published in 2001 - IPC

FIELD: locking devices, applicable as a safe lock with a quickly changeable code. SUBSTANCE: at a permanent set of levers the invention provides for such a changeable part, which is close to the stepped post of locks as far as the simplicity of replacement and dimensions are concerned. The lock has a code drum fastened on the post for turning and consisting of code plates fastened coaxially and representing shaped wheels with stop projections located in pairs opposite the axis of rotation, and the distance between the opposite projections is the same. The lock may be closed by one key turned once or several times, or closed by several keys turned in a preset sequence or by a preset number of turns. The code drum may be made for installation in the lock in several different positions, and in each of these positions the lock is closed by a key (keys) of its own. May be several modifications of the lever-type lock with a code drum. The code drum is fastened on a toothed wheel engaged with the rack of the tail end of the bolts. Displacement of the tail end of the bolts. Displacement of the tail end of the bolts imparts rotation to the toothed wheel with the code drum secured on it. In a lock modification the code drum is fastened on a disk rotating about the post axis and having a rack for the key. Rotation of the disk by the key through an intermediate link imparts motion to the tail end of the bolts. The disk on which the code disk is fastened and which comes out of the lock body at its rotation serves as a bolt. EFFECT: essentially enhanced secrecy of the lock. 9 cl, 4 dwg _