A Treatise Upon Wireless Telegraphy And Telephony
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Thus far only those systems have been described which em- ploy damped oscillations for signalling. Although several inven- tors have experimented with apparatus designed to produce un- damped or persistent oscillations, until recently no commercial ap- plication of systems using undamped oscillations has been made.
In 1892, Prof. Thompson produced electric oscillations by mak- ing use of a 500 volt D. C. Arc shunted by coils of inductance in series with condensers. The general scheme of his app...aratus is Fig. 12.
shown in Fig. 12. Prof. Thompson was granted a patent right upon this July 4th, 1892. His scheme has been modified and de- veloped and is used in some of the present arc generating systems. In Fig. 12 the action of the arc in giving rise to pulsating currents may be explained as follows: The condenser shunted about the spark gap receives a charge from a 500 volt D. C. Generator source, thus causing a fall of potential across the arc terminals. However, the main line pressure is the same so that the condenser in this way receives a slightly greater charge, that is, more current flows into it.
What to read after A Treatise Upon Wireless Telegraphy And Telephony?
You can find similar books in the "Read Also" column, or choose other free books by C I Hoppough to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Thus far only those systems have been described which em- ploy damped oscillations for signalling. Although several inven- tors have experimented with apparatus designed to produce un- damped or persistent oscillations, until recently no commercial ap- plication of systems using undamped oscillations has been made.
In 1892, Prof. Thompson produced electric oscillations by mak- ing use of a 500 volt D. C. Arc shunted by coils of inductance in series with condensers. The general scheme of his app...aratus is Fig. 12.
shown in Fig. 12. Prof. Thompson was granted a patent right upon this July 4th, 1892. His scheme has been modified and de- veloped and is used in some of the present arc generating systems. In Fig. 12 the action of the arc in giving rise to pulsating currents may be explained as follows: The condenser shunted about the spark gap receives a charge from a 500 volt D. C. Generator source, thus causing a fall of potential across the arc terminals. However, the main line pressure is the same so that the condenser in this way receives a slightly greater charge, that is, more current flows into it.
What to read after A Treatise Upon Wireless Telegraphy And Telephony?
You can find similar books in the "Read Also" column, or choose other free books by C I Hoppough to read onlineMoreLess
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