File:Roentgen induction coils for quick work (1903) (14571619857).jpg

Identifier: roentgeninductio00jame (find matches)
Title: Roentgen induction coils for quick work
Year: 1903 (1900s)
Authors: James G. Biddle Company
Subjects: X-rays Induction coils Radiography
Publisher: Philadelphia : James G. Biddle
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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om the lightest therapeutic to the very difficult radiographic work. Those desiring to do the ultra-rapid work (actual snapshots) willchoose the Roentgen 18 inch coil used with the Roentgen electrolyticinterrupter, for, on comparing the still shorter exposures possible withthe 18 inch coil, with those obtainable with the 15 inch, it will beseen that the 18 inch coil is necessary to securing the best definitionof the chest because of the involuntary motion of the heart, whilethere is a gain in the sharpness of definition due to the absence of thesecondary radiation as heretofore noted. The style of the 18 inch coil is the same as that of the 15 inch,and like it is furnished in polished mahogany finish unless otherwisedesired. We guarantee these coils to be of the best possible constructionthroughout. They will not break down with reasonable care in theiruse, and are made according to the principles of construction whichhave been found reliable by years of experience. The Tube Question,
Text Appearing After Image:
Fig. 6. R. F. Universal Regulating Tube. With water cooling attachment. There are no tubes made at the present time which can be expec-ted to withstand the heaviest output of our large coils for any greatlength of time. Should some one of the large tubes having a heavy anode of largethermal capacity be used the vacuum will not deteriorate if the heavydischarge be passed through it for but a short time. If on the con- JAMES G. BIDDLE, III4 CHESTNUT STREET, PHILADELPHIA. 15 trary the current be continued long enough to heat the anode beyonda certain point, the vacuum will be lowered and the tube spoiled.This plan of operation requires much care and judgment in subjectingthe tube to the terrific strain imposed upon it. A different plan is that of using a tube with a water-cooled anode.This kind of a tube when well made can be used with less danger ofhaving its vacuum lowered by hard running than any other form oftube obtainable, and though expensive, it is perhaps the most satis-factory

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