International Library of Technology · Scranton, International Textbook Co. · leaf 459
r as comparedwith a commutator, the mechanical construction of the col-lector must be carefully carried out, because it is necessaryin most cases to secure high insulation. Fig. 1647 shows aconstruction which may be used for simple collector rings.Such a pair of rings would be suitable for a… … CURRENT APPARATUS. 2825 being in the number of rings employed. The rings r, r aremade of cast copper, which must be free from blow-holes orimperfections tending to cause uneven wear. These ringsare usually made heavier than is necessary for collectingand carrying the current, in order to make them…
Electrical engineering
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