. Principles of electro-medicine, electrosurgery and radiology : a practical treatise for students and practitioners. With chapters on mechanical vibration and blood pressure technique . e reflected from the target and pass through the walls of thetube, travelling in straight lines in all directions. On account of the heat produced by the bombardment of the cathoderays, only platinum, iridium, or tungsten can be successfully used uponthe target. The advantage of using upon the target tungsten, whichmelts at 3000 degrees C, or iridium, which has much harder densitythan platinum, and melts at 17
. Principles of electro-medicine, electrosurgery and radiology : a practical treatise for students and practitioners. With chapters on mechanical vibration and blood pressure technique . e reflected from the target and pass through the walls of thetube, travelling in straight lines in all directions. On account of the heat produced by the bombardment of the cathoderays, only platinum, iridium, or tungsten can be successfully used uponthe target. The advantage of using upon the target tungsten, whichmelts at 3000 degrees C, or iridium, which has much harder densitythan platinum, and melts at 1700 degrees C, is at once apparent wherethe tube has to withstand very heavy currents for any appreciable lengthof time. The bi-anode or assistant anode (3) is set at an angle above and con-nected to the outer terminal of the anti-cathode, or the anode is either a small aluminum rod, a flat circular disc, or a large metallictube. The first two forms of bi-anode are the only practical ones to beoperated upon a coil where an interrupter is used, while for the trans-former the tubular form is preferred. The object of the bi-anode is toassist in the regulation of the Fig. 53—High Frequency X-ray Tube. The Exciting of an X-ray Tube When first exciting a new tube, great care should be exercised, owingto its delicate nature, apart from the fact that it is constructed of thinglass. A tube may puncture from no apparent cause when the currentis first switched on, and this is an accident which cannot be entirelyguarded against, although it is not a very frequent occurrence. As asafeguard against this, it is advisable to see that a tube is as free as pos-sible from dust and moisture on the surface of the bulb. It should also be remembered that a new tube is more readily dam-aged by overheating than an old one, and care should always be ta-ken not to over-run a tube so as to heat it beyond the point where afinger can not be held on it without discomfort. With an inductio
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Keywords: ., bookcentury1900, bookdecade1910, booksubjec, booksubjectvibration
