. Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy . ruse again. This interrupterwill run for a long time with-out interior cleaning, whichcan be readily accomplishedwithout taking apart, by un-screwing a plug in the bottomof the box, letting the mer-cury drain out, and filling thebox with water and giving ittwo or three vigorous shak-ings. After draining thewater out, the plug is re-placed tightly, and some freshmercury added, when it is ready for another three or four months use. In the jet interrupter, a jet of mercury impinges upon a rotatingmetallic surface
. Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy . ruse again. This interrupterwill run for a long time with-out interior cleaning, whichcan be readily accomplishedwithout taking apart, by un-screwing a plug in the bottomof the box, letting the mer-cury drain out, and filling thebox with water and giving ittwo or three vigorous shak-ings. After draining thewater out, the plug is re-placed tightly, and some freshmercury added, when it is ready for another three or four months use. In the jet interrupter, a jet of mercury impinges upon a rotatingmetallic surface. The jet carries the current, and the length of contactcan be regulated according to the operators demands by elevating or low-ering the contact plate relatively to the jet. The break is instantaneousand complete. The electrolytic interrupters are subdivided as follows : Wehnelt andthe Caldwell and Simon. This type of interrupter depends upon the formation of gas bubblesat the poles of an electrolytic cell. TJie electrolytic • break^ of Wehnelt (Fig. 74), the most rapid of all. Fig. 74.—Wehnelt interrupter. 160 ELEOTEO-THERAPEUTICS. interrupters, consists of a jar holding the electrolyte (dilute salpliuricacid s. g. 1016 to 1020), a plate of lead (the cathode), and a piece ofplatinum insulated except at its extremity (the anode)/ The greater the quantity of sulphuric acid employed, the greater thecurrent and the better the conductor. A steady electro-motive force of atleast 24 volts is applied to the interrupter, arranged in series with theprimary circuit of the coil. Should the platinum not constitute theanode, the interruptions will not be sharp and regular. Under these con-ditions the platinum is very rapidly consumed. One of the advantages of this interrupter is that either a continuousor alternating current can be employed. It likewise obviates the use of the condenser, and in manyinstances the rheostat. An-other advantage is, that itallows tremendous amounts ofamper
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradiolo, bookyear1910
