Abstract :
The paper opens with a brief review of the equipment necessary for modern X-ray work. The details mentioned in the opening paragraphs form the subjects of the sections into which the paper is divided. These subjects include induction coils, X-ray transformers, filament-heating transformers, rectification, d.c. equipment, tests and electrical measurements, switchgear and controls, fittings, and special sets. In the induction-coil section, reference is made to two new models which have some special features. In the fairly detailed discussion of X-ray transformers an attempt is made to indicate the service required from an X-ray unit and some practical features of design calculated to provide this service. Some particulars of secondary coils and bushings are included. Some causes of breakdown of the insulation between primary and secondary windings in X-ray and filament-heating transformers are cited, and means for their removal are suggested. Value tube and mechanical rectifiers are contrasted and some types of the latter are described. The need for adequate calibration and testing of X-ray plant is demonstrated, methods are proposed and suitable instruments are suggested. The provision of complete outfits in safe, totally enclosed containers, so desirable in the application of X-rays to works practice, is now possible, and details of some recent forms of portable gear are given.
