Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 323
riment 3 containsall the essential parts of the telegraphic sounder, whichis used as the receiver. 314 PHYSICAL SCIENCE. Fig. 255 shows the construction of the sounder incommon use. It consists of an electro-magnet, E, abovethe poles of which is a soft iron armature A mountedon a pivoted beam B,… … When the key and the sounder are connected in acircuit with the battery and the operator who is sendinga message depresses the key and closes the circuit, thescrew D of the sounder is drawn down against the frame,producing a click. When he breaks the circuit at thekey, the beam of the sounder is…
Physics
Internet Archive · Western University Libraries · Public Domain Mark 1.0. Free to use for anything.
