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 (1901)
Schneider, Norman H. (Norman Hugh) · New York : Spon & Chamberlain ; London : E. & F.N. Spon · leaf 96
ild. When in action, all rapid rheotomesgive out a definite musical note wherebythe rate of vibration can be determined.Reference to any work on acoustics willshow a table of the number of vibrationsnecessary to produce any stated musicalnote. The foregoing style of rheotome Contact Breakers. 69,… … Fig. 21. will give as high as 2500 vibrations persecond (Fig. 21). The armature y^ is a piece of flat hardsteel bar i X i inch, held rigidly on themetal support vS and just clearing the up- 70 Contact Brcakc7s. per surfaces of the magnet cores C. Theadjusting screw Pshould be provided withan arm, B…
Induction coils · Radiography · X-rays
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