. Radiography and radio-therapeutics . son by the addition of aningenious mechanism, a rectifier, which picks up the current at make andbreak, passing both through the tube. In this way the inverse currentis utilised to increase the output of the tube, offering possibilities of obtain-ing much larger currents in the tube circuit, and therefore greatly increasingthe usefulness of the interrupter. This contact is mounted on the end ofthe shaft of a motor whose speed can be varied in order to vary the numberof interruptions. This interrupter requires rather more mercury than mostof the other type
. Radiography and radio-therapeutics . son by the addition of aningenious mechanism, a rectifier, which picks up the current at make andbreak, passing both through the tube. In this way the inverse currentis utilised to increase the output of the tube, offering possibilities of obtain-ing much larger currents in the tube circuit, and therefore greatly increasingthe usefulness of the interrupter. This contact is mounted on the end ofthe shaft of a motor whose speed can be varied in order to vary the numberof interruptions. This interrupter requires rather more mercury than mostof the other types. Electrolytic Interrupter.—This type was introduced by ProfessorWehnelt. The principle of construction issimple. A platinum wire and a large leadelectrode are immersed in diluted sulphuric acidin the proportion of acid 1 oz. to water 5 specific gravity of the mixture should be1-2. It may be tested from time to time by usinga hydrometer. Variations in the specific grav-ity may explain the defective working of
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Keywords: ., bookcentury1900, bookdecade1910, bookidradiographyr, bookyear1919
