Identifier: practicalpointsi00judd (find matches)
Title: Practical points in the use of X-ray and high-frequency currents
Year: 1909 (1900s)
Authors: Judd, Aspinwall
Subjects: X-rays Electrotherapeutics Radiography X-Rays Radiography
Publisher: New York : Rebman Company
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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ughly aired out and freshcalcium and lime put in. If this is done, thereis no reason why the machine should not operatesatisfactorily the entire year. If the large ma-chine is of the Toepler-Holtz pattern, when itceases to generate, it should be treated inexactly the same manner as above describedfor the primer of the Holtz machine. The Use of the X-Ray Tube with the StaticMachine We attach the two wires already mentionedfor treatment purposes, one to the positive oranode end of our tube, the other to the negativeor cathode end. In this connection it may besaid that we can determine the direction of the The Static Machine 23 current by the light produced in the tube.Where the light is steady and greenish in color,we know that our current is passing correctly.Where, however, in place of this lighting up ofthe tube, we get concentric rings of light flash-ing across the globe, we know that our tube isimproperly coupled to the machine. This iscalled reversed polarity. By removing the tube
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Fig. 6.—Shows an X-ray tube connected in series with a multiple sparkgap, attached to a Static Machine. and replacing it in the opposite direction, weobviate this difficulty. Auxiliary Spark Gaps. These are used in astatic machine to control or steady the currentin the X-ray tube. They consist of any num-ber of brass balls desired, affixed to a non-conducting material, through which slides abrass rod with insulated handle. Our wires areattached to the balls at either end. By with-drawing the rod, the current jumps from ball toball. The description of this action will begiven in detail with the coil. (See Fig. 6.) CHAPTER III THE COIL AND ACCESSORIES In using a coil for the production of a currentsuitable for electro-therapeutic application, weare transforming the current from a current oflow voltage and high amperage into one of highervoltage and diminished amperage. We have two currents most suitable for usein the coil, the direct current (Edison9s) and thealternating current. Thes

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