Electric Motors, Continuous Current Motors and Induction Motors: Their Theory and Constuction

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 Excerpt: ...J. Wurts has conducted comparative life tests on the Nernst lamp, which have shown as average results a life of 1200 hours at 133 cycles, 800 hours at 60 cycles, and 400 hours at 25 cycles. Owing to its high first cost, the life is a more important factor in the Nernst than in the vacuum incandescent lamp. The use of ...

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