Abstract: A light system for an interior space of a motor vehicle comprises a plurality of function groups, each comprising a plurality of light-creation units (LE). Each light creation unit has an electrically activated and deactivated light source (LQ) and a reflector (R) for concentrating light from the light source. At least one light conductor (LL) is associated with each light creation unit with its first end being coupled to the light creation unit for transmitting concentrated light, the light conductor including a plurality of flexible individual light conductors (EL), and there being a light emitting unit (E) at a second end of the light conductor for illuminating a surface. The light sources of a single function group are simultaneously activated and deactivated. The light-creation units are spatially distributed in the motor vehicle so as to reduce the lengths of the light conductors.

Abstract: Mixing silo for pneumatically homogenizing fine-grained or dust-like material, the bottom of which comprises groups of aeration zones which can be alternately supplied with compressed air in such a manner that in each group a bottom zone partially limited by the outer limit of the silo bottom is heavily aerated and a bottom zone located between the heavily aerated bottom zones is aerated only weakly. An even, progressive circulation of the entire silo contents with little expenditure of energy is achieved by separating the heavily aeratable bottom zones from each other with a star-shaped, exclusively weakly aeratable bottom zone and by constructing the outlet as an overflow.