GB357093A - Improvements in or relating to x-ray apparatus - Google Patents

Abstract

357,093. Rontgen-ray apparatus. PIEPER, O. H., 43, Appleton Street, Rochester, New York, U.S.A. June 7, 1930, No. 17741. [Class 98 (i).] In apparatus comprising a container enclosing a transformer surrounded by an insulating fluid other than air, and an X-rav tube associated with the container and connected to the transformer, the ray-tube is secured to the outside of a part of the wall of the container in such a manner that it is detachable therefrom without unsealing the container, and one of its terminals is connected to the transformer by a conductor passing through the insulating fluid. The wall on which the ray-tube is secured may project into the container, forming a chamber into which the anode end of the ray-tube projects. As shown, an earthed metal container 13, Fig. 1, filled with an insulating and heat-dissipating fluid such as oil, encloses the H.T. and cathode-heating transformers 15, 70, and is closed by an insulating wall 21 having below the level of the transformers an aperture through which projects into the container an extension 37 of the rear part 34 of an insulating housing enclosing the ray-tube 10, the part 37 being rigidly connected at 36 with the wall 21 in fluid-tight manner. The front part 33 of the ray-tube housing is detachably held on the rear part 34 by interengaging shoulders 57 and an insulating hood 55, and is protected by an earthed metal casing 30 which is detachably held on the wall 21 of the container by thumb-screws 29, and which is lined with lead or other ray-impervious material. The rays emerge through an extension 31 of the casing 30 carrying a directing cone 32. The ray-tube 10 is of angular form, having an anode 12 lying in the extension 37, and a cathode 11 in the portion enclosed by the hood 55. It is detachably supported in the housing at three points-(1) by the engagement of the end 12a, Fig. 4, of the anode rod, which carries a split spring thimble 43, in a conducting sleeve 38 secured in fluidtight manner in the end of the extension 37, (2) by a ring 50, Fig. 1, of cork or other resilient material, and (3) by a strap 51 secured to a lug 53 on the wall 54 of the housing. The anode 12 is electrically connected to the secondary of the H.T. transformer 15 through the sleeve 38, the walls of a compressible hollow diaphragm 48 which seals the sleeve from the container, and a lead 49. The middle of the secondary is earthed, and its other end is connected by a lead 49a to a lead 66 connecting one end of the cathode filament to the heating transformer 70. The other end of the filament is connected through a spring 69, lead 68, and an adjustable rheostat 63 mounted on the wall 54 of the tube housing to a lead 67 connected to the transformer 70. The leads 66, 67 are embedded in the wall 54 up to the point where they enter the container 13. The anode is cooled by conduction of heat therefrom through the sleeve 38 and the walls of the diaphragm 48 to the fluid in the container 13. As this fluid becomes hot and expands, pressure in the container is relieved by compression of the diaphragm 48, the air in which may escape by way of the sleeve 38 and the slits in the spring thimble 43 into the ray-tube housing.