. The principles and practice of roentgenological technique . Fig. 46.—Tracing of oscilligram of transformer dis-charge. Tube load: 100 , 41 Kv. Usefulvoltage above zero line and inverse voltage be-low. The latter is of higher potential. Thedifference depends on design of transformer andcontrol. The advantages of the transformer are as follows: 1. The great amount of electrical output,thus permitting the production of great quan-tities of rays and the examination of densestructures in a fraction of a second. 2. The small amount of primary currentrequired. 3. The simplicity in manipulation
. The principles and practice of roentgenological technique . Fig. 46.—Tracing of oscilligram of transformer dis-charge. Tube load: 100 , 41 Kv. Usefulvoltage above zero line and inverse voltage be-low. The latter is of higher potential. Thedifference depends on design of transformer andcontrol. The advantages of the transformer are as follows: 1. The great amount of electrical output,thus permitting the production of great quan-tities of rays and the examination of densestructures in a fraction of a second. 2. The small amount of primary currentrequired. 3. The simplicity in manipulation and con-trol. 4. The absence of inverse. 5. The absence of Fig. 47.—25 transformer. Tube load: 200 ,70 Kv. Upper curve: tube current. Lowercurve: useful voltage above zero line and in-verse voltage below. These are nearly equaland when commutated will give a more usefulwave than a transformer whose inverse wave hasa higher potential. 46 CONVERTER UNIT Converter Unit (Rieber).A high tension transformer has been con-structed by Rieber, which he calls a converterunit. The fundamental improvement aroundwhich this transformer has been developedis the high tension rectifying switch. Therectifier consists of a series of five rectifyingelements or pole changers, mounted upon acommon shaft of bakelite, which runs com-pletely submerged in oil. The four collectorsor brushes, which convey the current to andfrom each of these elements, are of brass andmake actual metallic contact with the phos-phor-bronze segments of the pole principle of operation diiifers from thatof the older types of rectifier; first, in thateach section handl
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectradiogr, bookyear1920
