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Manual of Rural Telephony

Manual of Rural Telephony


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 Excerpt: ...of 300 Ampere hours, that is, it will deliver one Ampere of current for 300 hours, or three Amperes of current for 100 hours, or one-tenth of an Ampere for 3,000 hours, -or any amount of current hours that by multiplying together make 300 Ampere hours. I In the selection of batteries, either open or closed circuit, there is a great deal of leeway allowable, as there are several different makes of batteries that do very good work. In mentioning the batteries referred to in this chapter, the author has tried to pick out the standard types of batteries that are in most general use and, therefore, to be assumed, give satisfaction.-CHAPTER III. DIFFERENT METHODS OF CONNECTING BATTERIES FOR DIFFERENT RESULTS. In this chapter is illustrated the four different methods of connecting batteries: ' ' eeee" Figure 40 shows the series connection where the carbon of one cell of battery connects to the zinc of another cell of battery, and so on through the entire series. This system of connecting batteries multiplies the Voltage of one cell by the number of cells connected in one series group. That is: if you are connecting four batteries of 1% Volts each, you would have 1% times four, which would be six Volts for the entire group of batteries; but you would not increase the current strength of the battery on short circuit, as you do not decrease the internal resistance, the internal resistance as the Voltage being also multiplied by the number of cells in series. This type of battery connection is employed wherever considerable resistance has to be overcome outside of the battery resistance. Telephone batteries are usually two cells in number; sometimes three, and are always connected in series with each other. as in Figure 40. That is: the zinc of one cel...


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Product Details
  • ISBN-13: 9781231229859
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 42
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 1231229853
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 95 gr


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