Electric motor driven locking device for doors and windows has a time delay element for setting a delay between the undoing of a lock and its automatic re-locking

摘要

Electric motor driven locking device for doors and windows has a main lock (12) that is coupled to an auxiliary lock (14) via a drive rod (30) that is controlled by a drive arrangement (32). A lock bolt is moved between open and locked positions to hold a window or door element in position. A control arrangement is connected to the drive arrangement and has a time delay element (44) that can be set to provide a delay in moving the bolt from its locked to its opened position and then its return to a locked position.