Signalling through space without wires : being a description of the work of Hertz & his successors . the receiving instru-ment. has hitherto always been employed; but, with it, tuning is ofcourse impossible. A radiator with several swings is lessviolent at its first impulse than is a momentaty emitter;but then the lessened emitting power of a ladiator is tobe compensated by a correspondingly prolonged duration ofvibration on the part of the receiver or absorber, thusrendering the radiator susceptible of tuning to a specialsimilarly-tuned receiver or resonator. The tuned resonatoris then to res
Signalling through space without wires : being a description of the work of Hertz & his successors . the receiving instru-ment. has hitherto always been employed; but, with it, tuning is ofcourse impossible. A radiator with several swings is lessviolent at its first impulse than is a momentaty emitter;but then the lessened emitting power of a ladiator is tobe compensated by a correspondingly prolonged duration ofvibration on the part of the receiver or absorber, thusrendering the radiator susceptible of tuning to a specialsimilarly-tuned receiver or resonator. The tuned resonatoris then to respond, not to the first impulse of the radiator, butto a rapidly worked up succession of properly timed impulses;so that at length, after an accumulation of two or three, or TELEGRAPHIC APPLICATIONS. 53 perhaps four, swings, the electrostatic charges in its terminalplates become sufficient to overflow and spit off into thecoherer, thereby effecting its stimulation and giving the resonator not properly tuned—, one tuned to somedifferent frequency of vibration—would not be able to. (Fig. 10 of Specification 11,575/97).—Interchangeable Self-inductionCoils for signalling to different stations. accumulate impulses, and hence would not respond, unless ofcourse it were so much too near the radiator that the veryfirst swing stimulated it sufficiently to disturb the coherer;in which case, again, there is no room for tuning. The twopoints to attend to for syntonic discrimination are : (a) that
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Keywords: ., bookcentury1900, bookdecade1900, bookidsi, booksubjectelectricity
