A PROGRAMMABLE CYLINDER LOCK COMPRISING A SECURITY DEVICE TO PREVENT FAULTY PROGRAMMING

摘要

A lock with a programming device, comprising a stator (1), a rotor (9) rotatably inserted in stator (1), a keyhole for a key (C), a longitudinal groove (3) of stator (1), a set of key followers (16) and a set of locking pins (20) which, under control of a change bar (27), can be mutually engaged for the normal operation and disengaged in a change condition, and can be made movable or blocked under control of a stop bar (23) provided with springs which stress the stop bar (23) outwards, char acterized in that the lock includes a security device (53-56) in tended to prevent a faulty programming resulting from an incomplete insertion of the programming key (C) which security device operates by hindering the inward displacement of the change bar (27) in the case in which the key (C) intended to programming the lock is inserted in an in complete manner.