Abstract: A method and apparatus for assembling picture screen devices is disclosed having mounting parts consisting of a bezel and carrying frame having lateral centering surfaces for the guidance of the picture tube whereby the bezel is first placed into a molding dish. Then, the picture tube is placed into this bezel and the carrying frame, which completes the mount of the picture tube, is placed over the back of the picture tube. Subsequently, the two mounting parts are pressed against one another with a prescribed pressure and are fixed by fastening means arranged in a distributed fashion around the periphery of the picture tube.

Abstract: A locking mechanism for a bipartite keyboard housing the lower part of the keyboard has clearances at at least one side, preferably at the front side, hooks secured to the upper part of the keyboard extending into the clearances. A lock rail is displaceably disposed in a channel communicating with the clearances, being provided with obliquely upwardly bent contact tongues at the spacing of the hooks and with contact humps. A web is situated in the middle of the sides of the lower part of the keyboard, preferably at the front side, and an opening is situated in the lock rail, these being aligned with one another such that the lock rail is displaceable by means of a tool.