Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 196
advances axially, a metal stylus trav-erses the striations and causes contact to be broken for longor short intervals in accordance with the width of the stria-tions. The resulting intermittent currents pass through thehght-relay at the receiver and reproduce the image as before.Marino has… … fe££. ^TH-ixV arcs are arranged to produce oscillations of different fre-quencies whose amplitudes are controlled by seven sele-nium cells, every cell being most sensitive to one of theseven primary colors. At the receiver these oscillationscontrol other arcs connected in circuits that are tuned…
Telegraph
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