Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 56
oflow through the line relay and over the line when its operating coilis not excited, and when it is excited the circuit from battery andrelay is merely shifted from the real line to an artificial line formedby the rheostat. DUPLEX SYSTEMS A duplex system of telegraphy is one by which two… … Fig. 23. Wiring Diagram of Stearns Differential Duplex Telegraph System ]\Iassachusetts. It is sometimes designated as the single-currentduplex, but is more commonly called the Stearns duplex. The characteristic feature of this system is that the relay ateither station responds to incoming signals…
Electrical engineering
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