American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 415
it. The effect of thusgraduating the telegraph currents is to produce in the diaphragm of the telephonereceiver a gradual movement, to and from its electro-magnet, which movement is notsufficiently rapid to cai;se an appreciable sound. Upon this gradual vibration, or in-flection, of the… … selberghe utilizes the retarding and prolonging effects of the self-induction of elec-tro-magnets in an electric circuit, in a manner to be described presently. An idea of the manner in which the vibrations due to the telephone transmitter aresuperposed upon the inflections of the diaphragm due to…
Telegraph
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