Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 206
ELEGRAPHY 2,297 Commercial Marconi Apparatus.—A diagram of thecomplete Marconi wireless telegraph system is shown in fig.3,134. While there are various parts of apparatus which maysupplant those shown, such as the audion detector, the looselycoupled inductance, receiving tuner, the magnetic… … Fig. 3,135.—Central Scientific Co., Boston pattern wireless key. In construction, all metalparts except the steel pins of the center bearings are of solid brass. The key is mountedon a polished marble base 33^ x 6. As shown, the current from the lever is not conductedthrough the bearings but is…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
