. Journal of radiology . curve represents a hightension current of 15 M. the tube, and the upperone, the filament current taken atthe same time. The small irregu- That the stabilizer does producean even flow of current throughthe tube, even though the filamentcurrent is changed on each cycle,is shown by the evenness of thepeaks of the waves in the lowercurve, which is the curve of thehigh tension current. Page Seventeen NEW STABILIZER FOR COOL1DGE TUBE—K EA RSLEY the foregoing, a stabilizerhas been described which is oper-ated directly by the high tensioncurrent which flow
. Journal of radiology . curve represents a hightension current of 15 M. the tube, and the upperone, the filament current taken atthe same time. The small irregu- That the stabilizer does producean even flow of current throughthe tube, even though the filamentcurrent is changed on each cycle,is shown by the evenness of thepeaks of the waves in the lowercurve, which is the curve of thehigh tension current. Page Seventeen NEW STABILIZER FOR COOL1DGE TUBE—K EA RSLEY the foregoing, a stabilizerhas been described which is oper-ated directly by the high tensioncurrent which flows through thetube. Using the niilliampereageas the controlling element the sta-bilizer maintains the desired cur-rent through the tube regardless of c hanges either in the line volt-age or in the tube itself. It can be made small and it re-quires a negligible amount ofenergy for its operation. It should prove useful whereverit is desirable to automaticallymaintain a definite amount of cur-rent through a Coolidge 51—Read at the Annual Meeting of The Radiological Society at Chicago,December, 1920. Page Eighteen Radiation and Thyroid Disease Albert Soiland, M. D., F. A. C. Angeles, Calif. TV) the earnest student of radio-therapy there is no more in-teresting subject than the historyof this science, and as we are allradiologists here, it may not bepresumptuous to discuss brieflyits evolution. Let us treat the sub-ject under the heading: TheThree Af^es of X-Radiation. Firstcame the static a?e, when, withour large static inductionmachines, we had a combinationof biqft voltage and low amper-age, hard tubes and long expos-ures. In other words, we wereusing rays of the gamma type,but did not know it. It was inthis period that many brilliant re-sults were obtained, mainly em-pirically, which gave x-ray therapyits rapid rise to fame. In the sec-ond, the coil age, we had moresimple apparatus, more easilyoperated, but a distinct drop involtage and softer tubes. Thiscombinat
Size: 2437px × 1025px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1920, bookyear1921
