. 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 . 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 provenso interesting, was granted patents uponvarious forms of contact breakers, in which. i Contact
. 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 . 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 provenso interesting, was granted patents uponvarious forms of contact breakers, in which. i Contact Breakers. 83 the chief merit was that the contacts werebroken in a vacuum. The sparking wasalmost ehminated, and the suddenness ofthe break of contact so accentuated as tomaterially improve the output of an induc-tion coil. A perusal of his patents, copiesof which may be procured through almostany bookseller, will prove profitable to thecoil constructor. Queen Contact Breaker. The most important advantage of thisarrangement is the abrupt break, owing toa collar in the vibrator striking a movablecontact while at full speed. Reference toFig. 25 will show that the movable platinumcontact is carried on a small vertical springbehind the vibrator spring, and projectsthrough a collar on the vibrator the contact is made, the movement ofthe vibrator is not arrested, but continues atits full amplitude, thus allowing a long make. The vibrator is kept moving at 84 Contact Breakers. a constant amplitude by means of the smallcoil shown in the illustration, which is inshunt wit
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Keywords: ., bookcentury1900, bookdecade1900, bookidinductioncoi, bookyear1901
