. Dental and oral radiography : a text book for students and practitioners of dentistry . given. X-Ray Tube The x-ray tube is a thin glass bulb six or eightinches in diameter, having two elongations orstems projecting from the bulb opposite and inline with each other (see Fig. 25). One of theseelongations has within it a sheet iron tube atone end of which is a block of copper, faced withplatinum or tungsten, and set at an angle of 45degrees. The other end of this sheet iron tube 64 REQUISITES OF DEXTAL X-RAY LABORATORY 65 carries a platinum wire which is sealed into theglass at the end of the
. Dental and oral radiography : a text book for students and practitioners of dentistry . given. X-Ray Tube The x-ray tube is a thin glass bulb six or eightinches in diameter, having two elongations orstems projecting from the bulb opposite and inline with each other (see Fig. 25). One of theseelongations has within it a sheet iron tube atone end of which is a block of copper, faced withplatinum or tungsten, and set at an angle of 45degrees. The other end of this sheet iron tube 64 REQUISITES OF DEXTAL X-RAY LABORATORY 65 carries a platinum wire which is sealed into theglass at the end of the elongation and connectedto a cap on the outside which serves as an elec-trical connection. The other elongation carries a rod at one endof which is a concave aluminum reflector, theother end being connected by means of a plati-num wire sealed in the glass to a cap on the out- A—Anode. U--Assistant Anode C—Cathode D—RegulatingChamber F—Regulating Ad-juster G— Hemisphete H—ConnectionWire 1—Assistant *nodeCap K —Anode Cap L—Cathode Cap M—Cathode Stream N—Focal Point. Fig. of an x-ray tube. side of the elongation, and also serves as an elec-trical connection. The concave reflector is known as the cath-ode and the metallic block opposite it and lo-cated upon the end of the sheet iron tube is knownas the target or anode. Above the anodeand at an angle there is another stem projectingwhich carries a metallic terminal known as theassistant anode. 66 DENTAL AND ORAL RADIOGRAPHY
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