The Telephone System of the British Post Office. a Practical Handbook
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In our eReader you can find the full English version of the book. Read The Telephone System of the British Post Office. a Practical Handbook 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 The Telephone System of the British Post Office. a Practical Handbook
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To quickly assess the difficulty of the text, read a short excerpt:
This fuse indicates upon what section or transfer board the fault lies. In the case of transfer boards the A and B circuits are frequently divided into groups, so that the position of the fault may the more readily be ascertained. The top spring is con- nected to the positive and the bottom spring to the negative pole of the battery, so that if the top spring touches the central spring in the normal condition the battery is short-circuited. Upon a switch section this fault blows the section's f...use. The fuse is then replaced by a glow lamp and a peg inserted into each switch-spring in turn until the fault disappears, t 114 Faults and their Localisation.
due to the contact being broken with the bottom spring. A short-circuit, which occurs immediately the peg is inserted, due to a faulty bottom spring, may similarly be p.'.oved. As a rule, this is instantly discovered by the operator.
Now, at the transfer board a precisely similar proceedure may be followed. It should be remarked that owing to the formation of a derived circuit all the circuits which are through — i.e., indicator black— have their indicators thrown.
What to read after The Telephone System of the British Post Office. a Practical Handbook?
You can find similar books in the "Read Also" column, or choose other free books by Herbert, Thomas Ernest, 1875-1943 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
This fuse indicates upon what section or transfer board the fault lies. In the case of transfer boards the A and B circuits are frequently divided into groups, so that the position of the fault may the more readily be ascertained. The top spring is con- nected to the positive and the bottom spring to the negative pole of the battery, so that if the top spring touches the central spring in the normal condition the battery is short-circuited. Upon a switch section this fault blows the section's f...use. The fuse is then replaced by a glow lamp and a peg inserted into each switch-spring in turn until the fault disappears, t 114 Faults and their Localisation.
due to the contact being broken with the bottom spring. A short-circuit, which occurs immediately the peg is inserted, due to a faulty bottom spring, may similarly be p.'.oved. As a rule, this is instantly discovered by the operator.
Now, at the transfer board a precisely similar proceedure may be followed. It should be remarked that owing to the formation of a derived circuit all the circuits which are through — i.e., indicator black— have their indicators thrown.
What to read after The Telephone System of the British Post Office. a Practical Handbook?
You can find similar books in the "Read Also" column, or choose other free books by Herbert, Thomas Ernest, 1875-1943 to read onlineMoreLess
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