. Elementary and dental radiography / by Howard Riley Raper . is kept when not in use. The tube may have been dis-charged by the operator touching the terminals before putting the tubeaway, but if the tubes are stored in the same room where high-frequencyand other coil discharges are taking place, they will recharge themselvesfrom the atmosphere and discharge onto the rack, no matter of whatmaterial the rack may be made. A safe way of putting away tubes is toconnect the anode and cathode terminals together by a wire during thetime the tube is at rest. The general principle of construction of t
. Elementary and dental radiography / by Howard Riley Raper . is kept when not in use. The tube may have been dis-charged by the operator touching the terminals before putting the tubeaway, but if the tubes are stored in the same room where high-frequencyand other coil discharges are taking place, they will recharge themselvesfrom the atmosphere and discharge onto the rack, no matter of whatmaterial the rack may be made. A safe way of putting away tubes is toconnect the anode and cathode terminals together by a wire during thetime the tube is at rest. The general principle of construction of the fiigb-Trequency high-frequency X-ray tube (Figs. 56 and 57) are X-Ray tube. those already given in the description of the tubes built to be operated by a unidirectional current. The X-RAY TUBES AXD THE X-RAYS 59 chief difference between the high-frequency tubes and those already de-scribed lies in the different means resorted to in the former to dispose ofone direction or wave of the alternating current, or, to speak more def-initely, one cathode
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