Abstract: A locking mechanism for a sash type window comprising two adjacent sashes arranged to slide one behind the other in a generally horizontal direction within an enclosing frame is disclosed. When the window is in its closed position, actuation of the locking mechanism causes the sashes to slide relative to one another in a direction away from each other to assure better sealing between the sashes and the enclosing window frame. In a preferred embodiment, the two sashes are also drawn towards each other in a direction perpendicular to the sliding direction in order to obtain better sealing between the sashes themselves. The locking mechanism may also be used on sliding doors.

Abstract: A locking mechanism for windows having upper and lower sashes slidably disposed in a window frame. In the locked position of the mechanism, locking bolts mounted on the transverse rail of one sash engage a sidewall of a guide groove in the window frame, thereby forcing that sash towards the other sash to effect a better seal between the sashes. Optionally, at least one sash clamp mounted on a transverse rail of one sash is adapted to engage a cooperating receiving element affixed to the adjacent transverse rail of the other sash. In the unlocked position of the mechanism, the sash clamp disengages the receiving element, and the locking bolts release contact with the sidewall of the guide groove while still remaining within the groove. The locking mechanism also has a release position in which the locking bolts are retracted from the guide groove to permit the sash to be moved transversely for cleaning.

Abstract: A doorleaf lock, comprising a lock mechanism for controlling a locking bolt (12) and a catch bolt (15), which is controlled by means of a door handle. The catch bolt, in a neutral position defined by a spring means (21), extends with a non-circular bolt head (17) through a non-circular opening (16) in the lock front wall (11). The catch bolt is displaceable into the lock, against the action of the spring means (21), during manipulation of the handle. The catch bolt (15) abuts a catch means (22) in said neutral position, said catch means being accessible via a second opening (28) in the front wall (11). The catch means is displaceable from its catch position by manipulation from the outside via the second opening (28). Further, after said manipulation of the catch means (22), the catch bolt is displaceable with its bolt head (17) out of the non-circular opening (16) to the outside of the lock, enabling a turning of the catch bolt around its longitudinal axis.