American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 323
ishessparking at the contact points c of R. This momentary magnetism of e m tends to at-tract the iron t on the siphon, and, if the rate of the magnetic vibrations of e m corre-sponds with the fundamental rate of vibration of the siphon, the latter will vibrate munison with the vibration of the rod… … CUTTRISS MAGNETIC KECORDER. made to carry a glass tube g, partly filled with mercury. The tube is attached to thesteel rod as shown. At its upper end e carries the armature of the electro-magnet, m.When the tube is set in vibration, it will continue to vibrate in the well- knownway common to…
Telegraph
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