A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 115
lC 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 a 1also be employed. Clocks of non-electric… … 13 S. QmtroUtd Clock. Clo.l 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-
Electricity · Electrical engineering
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