File:Induction coils - how to make, use, and repair them including Ruhmkorff, Tesla, and medical coils, Roentgen radiography, wireless telegraphy, and practical information on primary and secondary battery (14777634483).jpg

Identifier: inductioncoilsho00schn (find matches)
Title: Induction coils : how to make, use, and repair them including Ruhmkorff, Tesla, and medical coils, Roentgen radiography, wireless telegraphy, and practical information on primary and secondary battery
Year: 1901 (1900s)
Authors: Schneider, Norman H. (Norman Hugh)
Subjects: Induction coils Radiography X-rays Radiography
Publisher: New York : Spon & Chamberlain London : E. & F.N. Spon
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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rotating disk. Before commencement ofrotation, and upon the current being turnedon to the tubes, a simple triangle will re-sult, but at a certain stage of rotation theMaltese cross shown is formed. A stillhigher rate of rotation will produce the Rotating Effects. i6i double star, Fig. 54, and as the rotation andrate of vibration of the coil contact-breakeris varied, an apparently endless successionof stars or triangles appears to grow outinto view. Although Figs. 53 and 54 serve to il-lustrate a triangle of tubes and its varia-
Text Appearing After Image:
FiG. 53. Fig. 54. tions, a very pretty and simple effect canbe obtained with it as follows : Threestrips of looking-glass are cut and scratchedacross their silvered surface, as describedfor the luminous pane, Fig. 37. The cur-rent then being allowed to pass, and thewheel being rotated, the triangle acts as 162 Rotating Effects. in the preceding paragraphs, multiplyingand forming figures, which are extremelyinteresting to watch. While treating on the subject of storcrwindow attractions, a few suggestions ona display of stationary Geissler tubes maybe made. Starting with the assumptionthat the platform on which the goodswould be displayed is of wood, a verysmail amount of preparation is necessary.The platform is covered with a dark mate-rial free from gloss, such as canton flannet,on which the tubes are laid in any fancypattern, or may be scattered haphazard.Fine bare wire (No. 36 B. & S. is not anytoo small) is run from tube to tube, usingcare that it does not touch itself in suchm

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