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 108
thicknessof a stout visiting-card. Near the end isriveted a platinum contact. One end of theribbon is held by a brass upright R, to whichconnection is made to circuit; the other endis riveted to a threaded rod, which passesthrough a brass pillar, and is held by a Contact Breakers, 8i thumb-screw… … Fig. 24. Ruhmkorff coils, are by no means of recentdate. Poggendorff made use of such priorto 1859, ^^^ noted the diminished sparkingat the contact breaker and increased effectin the secondary circuit. Mr. D. McFarlan Moore, whose experi- 82 Contact Breakers. ments in vacimm tube lighting have…
Induction coils · Radiography · X-rays
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