. Principles of electro-medicine, electro-surgery and radiology : a practical treatise for students and practioners, with chapters on mechanical vibration and blood pressure technique . of the two terminals are connected to the apparatus,but with the apparatus made with a single Tesla coil, it is importantthat the cathode of the tube is conected to the main terminal of theTesla coil. The current should be turned on gradually by means of a rheostator other device, so that only a very small amount of current will radiotherapeutic work, the strength of one milliampere or less is em-ployed
. Principles of electro-medicine, electro-surgery and radiology : a practical treatise for students and practioners, with chapters on mechanical vibration and blood pressure technique . of the two terminals are connected to the apparatus,but with the apparatus made with a single Tesla coil, it is importantthat the cathode of the tube is conected to the main terminal of theTesla coil. The current should be turned on gradually by means of a rheostator other device, so that only a very small amount of current will radiotherapeutic work, the strength of one milliampere or less is em-ployed (usually only from one- to three-tenths of a milliampere); whilein radiography up to live milliamperes may be used. Never allow to spark across the gap while exciting the tube. When the current under three-tenths of a milliampere is employed,the ordinary platinum target may be used, but when it is raised to fouror five-tenths of a milliampere, this target is liable to grow the strong currents are required, we must, therefore, use thetubes which are built with the anti-cathode and target able to withstandexcessive currents. The so-called heavy anode, or water-cooled. Fig. 54—Tungsten Target Water-cooled Tube. tubes (Fig. 54), for instance, will stand up to 5 milliamperes for thirtyseconds (150 milliampere-seconds) or more, or less current for a cor-respondingly longer period, say milliamperes for sixty seconds (asthis equals 150 milliamperes also), etc. All tubes will carry safely at least fifty per cent, more current afterthey have been seasoned than the strongest current they will takeimmediately after they have been put into service. The tube is sea-soned by passing about two-thirds of the full current through it a con-siderable number of times before working them at full power. Penetration Penetration of the X-rays depends on the rapidity (frequency) of ethervibrations, while the rapidity of vibrations depends on the vacuum ofthe tube and the voltage prod
Size: 1988px × 1257px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectelectri, bookyear1917
