Signalling through space without wires : being a description of the work of Hertz & his successors (1900)
Lodge, Oliver, Sir, 1851-1940, Hertz, Heinrich, 1857-1894 · London : "The Electrician" Printing and Publishing Company, Limited · leaf 65
eplaced by a piece of straight watchspring, clamped at one end, adjusted by a screw at theother, and lightly touched by a needle point at its middle;a very gentle tapping-back stimulus being provided in theform of a clockwork or other mechanically-driven motorgrazing lightly against one end of the… … Fia. 30 (Fig. 14 of Specification 11,575/97).—Another diagram of con-nections for Syntonic Receiver, with Coherer in a secondary or trans-former circuit; a conducting or a capacity shunt for the telegraphicinstrument being applicable as bef^e.
Electric waves · Telegraph, Wireless · Electricity · Wireless Technology
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