Port structure for x-ray devices

Claim 1

AN X-RAY DEVICE COMPRISING A HOUSING HAVING A PORT COMPRISING AN OPENING IN ONE WALL AND AN OUTWARDLY DIRECTED FLANGE ENCIRCLING THE OPENING, THE HOUSING HAVING X-RAY IMPENETRABLE MATERIAL LINING ITS INNER SURFACE AROUND THE OPENING, AN X-RAY TRANSPARENT WINDOW IN THE OPENING HAVING A MARGINAL PORTION POSITIONED AGAINST THE OUTER SURFACE OF THE FLANGE, A PLATE MOUNTED UPON THE OUTER SURFACE OF THE FLANGE AND EXTENDING OVER THE MARGINAL PORTION OF THE WINDOW FOR HOLDING THE WINDOW IN PLACE, THE PLATE HAVING A CENTRAL OPENING THERETHROUGH, AN APERTURED DISC WITHIN SAID OPENING WITH ITS INNER MARGINAL SURFACE POSITIONED AGAINST THE MARGINAL PORTION OF THE WINDOW, AN ESCUTCHEON MOUNTED OVER THE PLATE AND EXTENDING OVER A PORTION OF THE OUTER SURFACE OF THE DISC FOR RETAINING THE DISC WITHIN THE OPENING IN THE PLATE, AND A COLLAR CLOSELY ENCOMPASSING THE OUTER CIRCUMFERENCE OF SAID FLANGE, THE PLATE, DISC AND COLLAR BEING IMPENETRABLE TO X-RADIATION AND IN COMBINATION WITH SAID LINING MATERIAL PROVIDING MEANS FOR PREVENTING ESCAPE OF X-RAYS IN THE AREA OF THE PORT EXCEPT THROUGH THE APERTURE IN THE DISC.