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 194
y the Slaby-Arco system and the Braim-Siemens-Halske system.This company is operating under patents granted to Dr. RudolphSlaby of Berlin, Count Georg von Arco, and Prof. Ferdinand Braunof the University of Strasburg, each of whom has made importantcontributions to the subject of space telegraphy.… … Pig. 60. Circuit Diagram, Telefunken System Their equipment is sold outright and is noted for excellence of work-manship. The earlier sets of apparatus were furnished with a Morserecorder operated by a coherer of the nickel filings type, but latterlyan electrolytic detector and head telephone are…
Electrical engineering
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