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 78
y, and a second and heavier electromagnet which is called a sounder.The electromagneton the main line isthen called the relay(see Figs. 64,65, and66). The sounderhas a very heavyarmature (A, Fig.65), which is so ar-ranged that it clicksboth when it isdrawn down by itselectromagnetagainst the stop… … Pig. 65- Telegraphic Sounder. Chlcag,o
Electrical engineering
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