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 27
of vibrating freely, D is a permanent magnet ofthe horse shoe type, and E, E, an electromagnet located directly under the diaphragm Bwhich is in close proximity, but not in contact with, the poles of the magnet. These coilshave soft iron cores screwed fast to the ends of the steel magnet so that… … THE TELEPHONE 2,121 that the listeners ear placed close to the receiver cap readilyrecognizes the characteristics of the speakers voice. The use of the combination horse shoe permanent magnet,and electromagnet produces a very sensitive receiver. The Adler Bi-polar Receiver.—This receiver, which is…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
