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Electricians' operating and testing manual; a hand book for men in charge of electrical apparatus, repair men, trouble men, lamp trimmers, and electricians generally (1916) Horstmann, Henry Charles, Tousley, Victor Hugo, 1875- joint author · Chicago, F.J. Drake & co · leaf 143
disconnected. When synchronizingbright, the eye becomes more or less fatigued by con-stantly watching the lamp and the point of full bright- Operation of Alternators 139 ness may be misjudged. On the other hand an incan-descent lamp requires considerable voltage before thefilament becomes visible… … ©2 Figure 91 chronizers have been devised and are now generallyused, which will not only accurately indicate the ex-act point of synchrony but will also show which ma-chine is running too fast or too slow. The Lincoln synchroscope is a device designed forthis purpose. The principle of its operation… Electrical engineering · Electric testing
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