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Home > History and Archaeology > History > Electrical Engineering for Electric Light Artizans and Students; (Embracing Those Branches Prescribed in the Syllabus Issued by the City and Guilds Te
Electrical Engineering for Electric Light Artizans and Students; (Embracing Those Branches Prescribed in the Syllabus Issued by the City and Guilds Te

Electrical Engineering for Electric Light Artizans and Students; (Embracing Those Branches Prescribed in the Syllabus Issued by the City and Guilds Te


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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. 1891 Excerpt: ... the pole-pieces and the wrought-iron cores, screwing, at their lower extremities, into the solid portion of the bed-plate which forms the yokepiece, and thus holding these parts firmly together. The coils are wound so as to leave a space between the wire and the outer face of the wrought-iron core, as shown at a a in the figure, forming thereby a very effective means of ventilation, for as the wire gets warm its heat is imparted to the air inside this space, and this air rising, a constant circulation is maintained and the heat carried off by a steady draught of cold air. The series winding consists of twenty-five convolutions of copper strand, composed of nineteen No. 15 wires (standard wire gauge), a stranded conductor being much more flexible than a solid one, although it occupies a little more space. Over this is wound Fig. 171 the shunt coil, which consists of 2,712 turns, its resistance being 20-6 ohms. In order to afford a means of obtaining this resistance with this particular number of convolutions, two sizes of wire are employed--viz. Nos. 15 and 16, S.w.g.--the respective lengths of these two wires being adjusted to satisfy the conditions. The complete armature is shown in fig. 171. The core consists of a number of very thin flat rings of well-annealed charcoal iron, as shown at d in the sectional view (fig. 170). The outer diameter of the ring or disc is 11 inches, and its inner diameter 9 inches. Four rectangular notches are cut out of each disc, at equal distances round the inner edge; a sheet of thin paper insulates each disc from its neighbours, the whole of them being held tightly together by two rigid end-plates. Upon the Bessemer steel shaft B is keyed a gun-metal spider, s, having four radial arms, its length along the shaft being equal...


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Product Details
  • ISBN-13: 9781155600154
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 194
  • Spine Width: 10 mm
  • Width: 189 mm
  • ISBN-10: 1155600150
  • Publisher Date: 07 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 354 gr

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Electrical Engineering for Electric Light Artizans and Students; (Embracing Those Branches Prescribed in the Syllabus Issued by the City and Guilds Te
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