Cyclopedia of applied electricity : a practical guide for electricians, mechanics, engineers, students, telegraph and telephone operators, and all others interested in electricity (1905)
American School (Chicago, Ill.) · Chicago : American School of Correspondence · leaf 322
of local, and an-other pair of extra local, batteries. The local batteries belong tocircuits which, it will be noticed, are marked one with dots, theother with dots and dashes, the same as in the Milliken repeater.On the East set the battery is marked MB, relay E, extra sounderE (operated by… … 294 THE ELECTRIC TELEGRAPH tant East opens his key; lie thereby opens in rapid succession relayE and transmitter T, which, in turn opens the West wire and relayW. The opening of the local points of the latter instrument wouldordinarily open transmitter T, and therefore the East wire whichpasses…
Electrical engineering
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