Cyclopedia of applied electricity : a practical guide for electricians, mechanics, engineers, students, telegraph and telephone operators, and all others interested in electricity (1905)
American School (Chicago, Ill.) · Chicago : American School of Correspondence · leaf 400
Diagram Branly-Popp System.Fig. 41. slightly oxidized. The legs are fastened to a metal disc at the top,the points resting on a polished steel plate. In the photograph itwill be observed that the coherer is placed immediately back of the … Branly-Popp System.Fig. 42. 364 WIRELESS TELEGRAPHY 35 electroinacrnets of the Morse register, and when the armature isattracted by the magnets, a projecting hammer serves to tap thecoherer, restoring the high resistance between the points and mak-ing the plate ready for the succeeding impulse. Cj…
Electrical engineering
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