Abstract: In a device for projection on a dome with a plurality of projectors (50, 51, 54, 56) for displaying image contents on an at least partially spherical projection surface (52), wherein every projector (50, 51, 54, 56) is arranged in such a way that it illuminates at least a partial surface (56, 58) of the projection surface (52) with partial images, and there is provided for at least for one of the projectors (51, 54, 56) a light source (12) and a deflecting device (40) by which a light bundle (10) emitted from the light source (12) can be guided along the portion to be illuminated in order to display the image contents, the deflecting device (40) of the at least one projector (51, 54, 56) is constructed as a scanning device by which the light bundle can be guided in a plurality of lines with a plurality of picture points over the partial surface (56, 58) to be illuminated, and the light source (12) is connected to an intensity control (64) on the basis of which individual picture points can be illuminated for

Abstract: A locking unit for a missile launching device comprises a pivoting pawl. The pawl has two locking lugs to clamp a shoe on the missile. The pawl is preloaded by a spring towards a locking position in which the shoe of the missile is held by the lugs. A locking lug on the pawl co-operates with a safety pawl against which the locking lug bears in the locked position. The pawl is thus held in the locked position in which the shoe is gripped by the lugs. A safety pin can be fitted through a housing of the locking unit with the pawl in the locked position. This provides a check whether the system has been properly fitted and the pawl is in the correct position. To prevent errors during this check, there is a connecting link on the pawl projecting into the path of the safety pin if the pawl is not in its proper locking position.

Abstract: A process for the production of pyrogenic silicic acid having an increased thickening effect which comprises subjecting silicon-containing materials to a pyrolysis flame while introducing additional energy into the flame. The invention also relates to the product so obtained, particularly useful for articles of dental care.

Abstract: An agglomerated mixture includes 30-95% by weight of highly dispersed metal oxides produced by flame hydrolysis and 5-70% by weight of inorganic opacifiers that have at least one absorption maximum in the range between 1.5 and 10 .mu.m, selected from the group consisting of inorganic oxides and mixed oxides, carbides and nitrides. The invention also relates to a process of manufacturing the mixtures and to their use as heat-insulating material and the like.