A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 114
Fig. 138. ControlledClock. Clo. 104 [Clo. In a system of time-telegraphy, the controllingclock is called the master clock, and the con-trolled clocks, the secondary clocks. Secondary clocks are generally mere dials, con- Clock, Electrical-Controlling -In … Fig. 139* Mechanism of Secondary Clock. taining step-by-step movements, for moving thehour, minute and second hands, as shown inFig. 139. In Spelliers clock, a series of armatures H,Fig. 140, mounted on the circumference of a JA
Electricity · Electrical engineering
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