File:X-ray manual - U.S. Army (1917) (14570662618).jpg

Identifier: xraymanualusarmy00unit (find matches)
Title: X-ray manual : U.S. Army
Year: 1917 (1910s)
Authors: United States. Surgeon-General's Office American Roentgen Ray Society
Subjects: X-rays Fractures Teeth Chest Heart Radiography
Publisher: New York : Middleditch
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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Text Appearing Before Image:
Fig. 45. The path of negative charge from line through spark gap, tube andmllliammeter.
Text Appearing After Image:
Fig. 46. Use of a lamp in trouble hunting.83 84 X-RAY MANUAL—U. S. ARMY Locating Trouble. Troubles in X-ray apparatus may be divided into twogroups: (a) mechanical; (b) electrical. Under mechanical, we may have worn bearings, wornor broken brushes, slip of rectifier on shaft; warping ofwood thus throwing shaft out of alignment. Care inoiling and keeping clean and dry will prevent most ofthese. Under electrical troubles, we have: (a) Improper connections. (b) Break in conducting line. (c) Loose connections. (d) Failure of insulation. To avoid (a) all wires removed from their connectionsshould be labeled as well as the binding posts, etc.,from which they were disconnected. Serious damagemay ue done if one attempts to operate with improperconnections. To find breaks, close switches and use test lamps, asdirected in the following pages. When the lamp lightson connecting two points between which the resistanceshould be low, there must be a poor connection or abreak. Loose contacts are li

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