e instruments. By making the gaps wideenough to prevent the possibility of this happening, thesensibility of the instrument is seriously impaired. Toovercome this trouble Prof. Elihu Thomson has devised amethod of inclosing the instrument in a glass tube orbulb, exhausted to an extremely high… … Fig. 55. 46. Electrostatic Ground Detectors.— The electrostaticelectrometer principle may be applied to the detectionof grounds on transmission Jines. Fig. 56 shows theStanley static ground detector. This is essentially a differ-ential static voltmeter, composed of six fixed metal vanes,two primary…
Electronics · Electricity
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