File:Radiography, x-ray therapeutics and radium therapy (1915) (14777389673).jpg

Identifier: radiographyxrayt00knoxuoft (find matches)
Title: Radiography, x-ray therapeutics and radium therapy
Year: 1915 (1910s)
Authors: Knox, Robert, 1868-1928
Subjects: Radiography Radiotherapy X-rays
Publisher: London : A. & C. Black
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: MSN

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DESCRIPTION OF MANUFACTURE OF THE X-RAY TUBE 29 also a great advantage to familiarise ones self with the names of the variousparts. Description of the Manufacture of an X-Ray Tube.—The firstprocess consists of the blo-^dng of a glass sphere of the desired capacitywith a neck, which varies from one to two inches diameter, according tothe size and type of the tube. The thickness of the walls of the bulb isfrom 2 to 6 mm. The various metal parts, or electrodes, having been carefully cleaned,are introduced through this neck, and are in turn sealed into position by theglass-blower. Connections are made to the outside by fusing into the glasspieces of platinum wire, and as each portion of the tube is finished, it isannealed with extraordinary care. This annealing is one of the most im-portant processes, as an X-ray tube has to withstand the most intense heat,
Text Appearing After Image:
Fig. 26.—Radiator tube constructed for heavy discharges. (Cossar.) to say nothing of the rough usage which it may encounter if it is destinedfor a hospital career. The electrodes having been placed in position, and the regulators, etc.,attached, a length of glass tubing is fused on, and the tube is placed on thevacuum pump. The final stages of exhaustion are sometimes very pro-longed, varying according to the size of the tube and the nature of theelectrodes employed. A large tube may occupy a considerable time in actual exhaustion.During the process various conditions have to be observed, and it is duringpumping that the unavoidable risks of tube-making are greatest, as withthe increase of pressure from \AT.thout, any stress, flaw, or other fault mayresult in the sudden collapse of the tube. AVhen exhaustion is complete, the tube is taken from the pump, sealed,tested, and, if found to be in order, is finished ofi with the necessaryterminals. The Anti-cathode.—The most important pa

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