The book Wireless Telephones And How They Work was written by author James Erskine Murray Here you can read free online of Wireless Telephones And How They Work book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Wireless Telephones And How They Work a good or bad book?
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In the watch the intermittent, though always forward, motion of the wheelwork causes the balance wheel to vibrate backwards and forwards, just as the direct cur- rent impulses in such systems as the Lepel, cause the production of an alternating current. In what follows the motion of electricity in the cir- The Motions of a Watch. 37 cuit is compared with the motion of the materials com- posing the springs and wheelwork of the watch. The drum containing the mainspring slowly moves round as the s...pring unwinds itself, its motion being always in one direction compare this to the supply current. This forward motion is transmitted by the train of wheelwork to the lever of the escapement which starts the balance wheel turning in one direc- tion. The wheel, however, does not turn far, as in turn- ing it tightens the hair spring, and when the energy of the impulse given to it by the lever has all been used up in tightening the spring the force of the latter causes the wheel to reverse its motion.
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