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 (14571291937).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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^ the break of the cir-cuit, which would tend to prolong the mag-netization of the core beyond the desiredlimit. The whole apparatus is mounted on awood base, having the condenser in a falsebottom for the sake of compactness. It is not herein intended to describe allthe minor operations in the constructionof a RuhmkorfE coil. A sufficient descrip-tion and review of the main points to beconsidered, however, will be given to enablea person fairly proficient in the use of simpletools to construct a serviceable instrument. The parts and their arrangement in re-lation to one another are shown in Fig. i,but are not drawn strictly to scale, al-though very nearly so. Coil Constrtiction, C is the core, consisting- of a bundle ofsoft iron wires as fine as can be obtained.
Text Appearing After Image:
The greater the subdivision of the core thequicker will it respond to the magnetizing Coil Construction. 5 current in the primary coil, and lose itsmagnetism when the current ceases. Ithas another advantage, m that the disadvantageous eddy, or Foucault currents,are lessened, which fact, however, is ofnot enough importance to need extendedconsideration. Many coil-makers saturate the core withparaffin or shellac, which is of slight bene-fit. This core is wrapped m an insulatinglayer of paraffined paper or enclosed m arubber shell, there not being any greatnecessity to use more than ordinary insu-lation between the core and the primarycoil. In the majority of induction coils or transforniers used in the alternatmgcurrent system of electric lightmg, theiron cores form a closed magnetic circuit.A closed magnetic circuit in a Ruhmkorffcoil could be obtained by extending theiron core at each end and then bendingand securing the ends together, forming,as it were, a ring partly inside and part

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