. Radiography, X-ray therapeutics and radium therapy . Fig. 22.—Trolley control table, with resistancesarranged to facilitate time and rapid exposures. (Siemens.) sumed, platinum is always used with these interrupters as the active electrode,because it disintegrates very slowly and therefore gives the best results. 24 RADIOGRAPHY These interrupters are manufactured with 1, 2, 3, 4, or 6 separate electrodes, they are used as single, double, triple, quadruple, or sextuple employing a multiple interrupter one is not obliged to regulate at theinterrupter itself, and can there
. Radiography, X-ray therapeutics and radium therapy . Fig. 22.—Trolley control table, with resistancesarranged to facilitate time and rapid exposures. (Siemens.) sumed, platinum is always used with these interrupters as the active electrode,because it disintegrates very slowly and therefore gives the best results. 24 RADIOGRAPHY These interrupters are manufactured with 1, 2, 3, 4, or 6 separate electrodes, they are used as single, double, triple, quadruple, or sextuple employing a multiple interrupter one is not obliged to regulate at theinterrupter itself, and can therefore set it up outside the X-ray room, sothat its noise causes no Fig. 23.—Larger view of top of trolley control table to show the regulating parts. (Siemens.) The advantages of the Wehnelt interrupter are summarised briefly asfollows : (1) Simplicity of construction. (2) Convenient handling of the X-ray outfit. The Wehnelt interrupterrequires no attention. (3) Largest ^capacity, as it interrupts very rapidly the largest amountof energy and therefore the most intense X-rays are obtained. (4) Long life to the tubes even when used with heavy currents. (5) In comparison with all mechanical interrupters, great reliability. METHOD OF ACTION OF AN ELECTROLYTIC INTERRUPTER 25 This is due to its simplicity of construction and method of working, theabsence of moving parts, and the consequent simplicity of connectionsof the whole outfit. In the case of X-ray outfits for rapid exposures three or more electrodesare arranged in parallel by means of a switch, and the electrodes are soadjusted that equal parts of them interrupt the total current. In conjunction
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