. Radiography, x-ray therapeutics and radium therapy . nduction current — and the greatertherefore is the discharge. For practical purposes there are two types of interrupters which requiredescription. These are : (a) The Mercury Interrupter. (6) The Electrolytic Interrupter. Of the former there are many varieties, but it will suffice to mentiona few and give a short de-scription of each beforeproceeding to the electro-lytic type. Probably the best all-round interrupter of thecentrifugal mercury type isthe Sanax, but this has oneobjectionable feature, trouble of cleaning undoubt
. Radiography, x-ray therapeutics and radium therapy . nduction current — and the greatertherefore is the discharge. For practical purposes there are two types of interrupters which requiredescription. These are : (a) The Mercury Interrupter. (6) The Electrolytic Interrupter. Of the former there are many varieties, but it will suffice to mentiona few and give a short de-scription of each beforeproceeding to the electro-lytic type. Probably the best all-round interrupter of thecentrifugal mercury type isthe Sanax, but this has oneobjectionable feature, trouble of cleaning undoubted advantagewhich other forms of mer-cury interrupters possessover it is the ease withwhich they may be cleaned,and owing to the fact thatgas is used in many as the di-electric instead of paraffinthey require cleaning lessfrequently, and further the mercury never becomes ^^^ --^-—Diagram to illustrate coustruction of a centrifugal mercury interrupter. (Siemens.)7n, Motor,c^ and c, ^ and cP, Mercury , , Adjustable emulsified. Practicallyevery maker manufacturesan interrupter of this type,and a general descriptionwill apply to all. The prin-ciple is the same in each—a mercury jet rotating in a vessel with a gas r, Funnel for di-electric. V, Safety valve. u, Gas tap. e, Containing vessel. g, Closing valve. 18 RADIOGEAPHY Motor Resistance AAAAAAA^ Current ? supply
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