Lock against theft for windows and balcony doors

摘要

The lock is designed to be set into the masonry around the freely moving side of a window casement or door panel. It can also be set into the lower rim of a window or door panel, or can be sunk into the floor. A guide tube for the bolt can be inserted into the masonry piece by piece, and a disc which surrounds the tube can be mounted on the outside of the masonry, together with a pressure cylinder lock. The lock can have a pin, which can run inside the tube and on operation of the pressure cylinder can be projected in front of the window or door frame by means of a spring, and can be held in this position. It can then be pushed back into the tube, where it can also be held.