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 167
s, mention must be given to oneother fundamental form employed by INIarconi. It took advantageof the important fact that though it is exceedingly diflficult to createa true alternating arc between two relatively moving surfaces, never-theless an electric oscillation from a condenser can readily… … Fig. 31. Multiple-Ball Exciter 144 RADIOTELEGRAPHIC APPARATUS 51 advantages as attested by the extensive employment of it at the trans-Atlantic stations. The illustrations make clear the connections.The apparatus consists of two metallic disks A and B, revolvingat high speed, and a second larger…
Electrical engineering
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