Modern American Telephony in All Its Branches
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In our eReader you can find the full English version of the book. Read Modern American Telephony in All Its Branches 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 Modern American Telephony in All Its Branches
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275 motor-generator sets and power board board, as well as the telephones, is located in one centralized plant. The source of power must be steady, not fluctuating in nature as is the electric light circuit, so that no noises will be produced in 442 Telephony the various telephones. A storage battery seems to be the only reliable and satisfactory source of power available, as primary batteries are prac- tically prohibitive on account of the expense.
Storage batteries may be charged direct from ...the power leads through a suitable lamp rheostat, by a motor generator set, a mercury arc rectifier charging set, or a charging generator run from a gas or gasoline engine. Except where the primary power is extremely cheap the first method should never be used for a multiple board, as the expense is excessive.
The method whereby a motor generator charg- ing set is allowable, should always be restored to if possible. "\Miere alternating current only is obtainable, either a motor generator charg- ing set or a mercury arc rectifier can be used, Figs.
What to read after Modern American Telephony in All Its Branches?
You can find similar books in the "Read Also" column, or choose other free books by Smith, Arthur Bessey, 1875-1959 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
275 motor-generator sets and power board board, as well as the telephones, is located in one centralized plant. The source of power must be steady, not fluctuating in nature as is the electric light circuit, so that no noises will be produced in 442 Telephony the various telephones. A storage battery seems to be the only reliable and satisfactory source of power available, as primary batteries are prac- tically prohibitive on account of the expense.
Storage batteries may be charged direct from ...the power leads through a suitable lamp rheostat, by a motor generator set, a mercury arc rectifier charging set, or a charging generator run from a gas or gasoline engine. Except where the primary power is extremely cheap the first method should never be used for a multiple board, as the expense is excessive.
The method whereby a motor generator charg- ing set is allowable, should always be restored to if possible. "\Miere alternating current only is obtainable, either a motor generator charg- ing set or a mercury arc rectifier can be used, Figs.
What to read after Modern American Telephony in All Its Branches?
You can find similar books in the "Read Also" column, or choose other free books by Smith, Arthur Bessey, 1875-1959 to read onlineMoreLess
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