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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he small solenoid of dArsonval, from the top ofthe large solenoid he would obtain a long spark, which varied accord-ing to the point of contact from the large solenoid on to the smallsolenoid. In order to make this more convenient, he designed anapparatus as shown in Fig. 22. not very greatly used at the present time. Itconsists of a helix cage (dArsonval) somethinglike a mouse-trap, of size sufficient to contain aman, connected to the small solenoid by meansof a wire, or a spiral placed at the top of thelarge solenoid (Piffard). It is usually attachedby means of a pulley and rope to the ceiling, so 54 X-Ray and High-Frequency Currents that it can be raised and lowered to admit thepatient. (See Fig. 20, Solenoid.) The Auto-Condensation Couch usually con-sists of a table with insulated legs, upon whichis placed a woven wire screen or mattress. Onewire from the dArsonval coil is connected tothis, the patient holds the other; a leather cov-ered or felt blanket is spread over the mattress
Text Appearing After Image:
Fig. 20.—The above cut illustrates the large solenoid of dArsonval.This is large enough to place the patient inside of it, and when usedin this way, it is termed auto-induction. on which the patient is placed. (See Fig. 21,Auto-Condensation Couch.) Instead of an auto-condensation couch Piffardmakes use of an ordinary armchair, on the seatof which he places a cushion constructed in thefollowing way: A circle 17 inches in diameteris cut out of whitewood one-half inch in thick-ness. Commencing at the center, a spiral ofNo. 3 (B. and S. gauge) aluminum wire is High-Frequency Apparatus 55 wound with turns 2 inches apart between cen-ters, until the circumference of the wood isreached, when the wire is turned to form asmall loop. The wire is firmly attached to thewood by a sufficient number of double-pointedtacks. Three other circles are cut from the -o o

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