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 231
m-pact, requiring but little space, and may be conveniently placed ona small table. A distance of 25 to 45 miles may be very well coveredwith the Telefunken sets such as are supplied for use on shipboard,and equipments of greater power may be had. Simultaneous talkingand receiving is not provided… … > > /frcnv/NG >> > /i£:C£l\/£/? > > ^ ( ^DETECl 1 Fig. 16. Circuits of Ruhmer System into the properties of selenium, is characterized by the use of anoscillatory arc burning in hydrogen or other suitable gas. TheRuhmer circuits are shown in Fig. 16. A local-battery…
Electrical engineering
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