Abstract: This invention relates to a lighting system having a plurality of individual light points or groups of individual light points which may be controlled by means of a central switch element, acting on all individual light points, whereby the function of the individual light points (or groups of individual light points to be jointly connected) is maintained independent of the central control and the individual light points may be switched on and off individually and independently, this lighting system being installable in a most simple manner with the use of already installed two-wire cabling and without additional cabling or devices. The present invention also relates to the central switch element and to the individual light switches associated with the individual light points or groups of individual light points, in different embodiments.

Abstract: The invention relates to an X-ray examination apparatus comprising a frame and a patient examination table which is slidably connected to the frame. This apparatus is particularly suitable for making Bucky exposures. The apparatus offers the advantage that it is very accessible from the sides, without mounting the guide rail (the guide rail supports the stand which supports the X-ray source) on the wall or the ceiling. To this end, a column which supports the X-ray source is movable in a longitudinal direction along a guide rail. The guide rail, in turn, is movable in the longitudinal direction on a carriage. The carriage, in turn, is movable in the longitudinal direction on a stationary frame. This results in a telescopic movement of the movable parts and in a displacement range which is larger than the width of the frame.