A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 113
e coilC in the opposite direc-tion. In this manner aslight motion forwards orbackwards is imparted tothe pendulum, which isthus kept in time with thecontrolling clock. Mercury contacts aresometimes employed inplace of the springs S andS. Induction currents may A1also be employed. Clocks of… … 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
Electricity · Electrical engineering
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