X-ray examining apparatus including a tomographic exposure installation

In an X-ray examining apparatus including a tomographic X-ray exposure installation;

• positioning drive means for effecting laminagraphic height adjustment;
• and means for making the presently set laminagraphic height on the tomographic X-ray exposures, the improvement comprising:
• scale dial means having laminagraphic height gradations thereon being operatively connected to said positioning drive means and associated with X-ray film sheets during exposure of the latter so as to mark the area representative of the currently set laminagraphic height on said film sheets;
• a position indicator connecting said scale dial means with the positioning drive means, said position indicator comprising an elongated casing with a relatively longitudinally displaceable wire therein, connecting said scale dial means with the positioning drive means for the laminagraphic height adjustment;
• said laminagraphic height gradations on said scale dial means being reproducible through X-rays;
• and means for supporting the scale dial means and the area representative of the currently set laminagrahic height in adjacency to film-proximate diaphragm means so as to project into the cone of the focused X-rays;
• said diaphragm means including at least two diaphragm plates;
• a base plate adjustably supporting said scale dial means, said base plate including a slide member supported on said diaphragm plates for concurrent longitudinal movement along the intersecting location of said two diaphragm plates;
• said scale dial means comprising a circular scale plate;
• means for rotatably supporting said scale plate, said scale plate having the laminagrahic gradations on the circumferential edge zones thereof extending above the edges of said diaphragm means defining the X-ray cone and projecting into said X-ray cone.