How It Works
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In our eReader you can find the full English version of the book. Read How It Works Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book How It Works
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The same thinghappens when T_2 is used. At the end of the conversation the receiversare hung on their hooks again, and the bell circuit is remade, ready forthe next call.
[Illustration: A TELEPHONE EXCHANGE. ] DOUBLE-LINE CIRCUITS.
The currents used in telephones pulsate very rapidly, but are veryfeeble. Electric disturbances caused by the proximity of telegraph ortram wires would much interfere with them if the earth were used for thereturn circuit. It has been found that a complete metallic c...ircuit (twowires) is practically free from interference, though where a number ofwires are hung on the same poles, speech-sounds may be faintly inducedin one circuit from another. This defect is, however, minimized bycrossing the wires about among themselves, so that any one line does notpass round the corresponding insulator on every pole.
TELEPHONE EXCHANGES.
In a district where a number of telephones are used the subscribers areput into connection with one another through an "exchange, " to which allthe wires lead.
What to read after How It Works?
You can find similar books in the "Read Also" column, or choose other free books by Archibald Williams to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The same thinghappens when T_2 is used. At the end of the conversation the receiversare hung on their hooks again, and the bell circuit is remade, ready forthe next call.
[Illustration: A TELEPHONE EXCHANGE. ] DOUBLE-LINE CIRCUITS.
The currents used in telephones pulsate very rapidly, but are veryfeeble. Electric disturbances caused by the proximity of telegraph ortram wires would much interfere with them if the earth were used for thereturn circuit. It has been found that a complete metallic c...ircuit (twowires) is practically free from interference, though where a number ofwires are hung on the same poles, speech-sounds may be faintly inducedin one circuit from another. This defect is, however, minimized bycrossing the wires about among themselves, so that any one line does notpass round the corresponding insulator on every pole.
TELEPHONE EXCHANGES.
In a district where a number of telephones are used the subscribers areput into connection with one another through an "exchange, " to which allthe wires lead.
What to read after How It Works?
You can find similar books in the "Read Also" column, or choose other free books by Archibald Williams to read onlineMoreLess
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