Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 424
o extended the mathematicalproblem dealth with by Lagrange and Lord Rayleigh. In the sin- 366 PUPIN TELEPHONY 367 gular efficiency of transmission thus studied he saw a principlewhich, by analogy, he believed to hold true in the electrical fieldas in mechanics. This principle he has illustrated in… … Prof. Pupins diagram explaining his system of longdistance telephony. rigidly fixed. To one of its- prongs is attached a flexible inex-tensible cord, bd. Let the fork vibrate steadily by any suitablemeans. The motion of the cord will be a wave motion, as in B.The attenuation of the wave as it dies…
Inventions · Inventors
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