The Principles and Practice of Electric Lighting - Bookswagon
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The Principles and Practice of Electric Lighting

The Principles and Practice of Electric Lighting


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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. 1884 Excerpt: ...the pencil, by means of the conical form of its extremity, to pass the abutment pole. In this way the arc extremity of the lower carbon is always maintained at a fixed point, and the upper carbon only descends sufficiently to compensate for its own consumption, instead of moving, as was the case before, at a rate equal to the consumption of both carbons together. The mechanism of the lamp is usually contained in a metal case, and the carbons in a glass globe, which prevents from falling any fragments of hot carbon which may become detached. In order to diffuse the intense rays of the light produced the globe is often frosted. A Siemens lamp and globe are shown in fig. 38. The Siemens pendulum lamp is a very practical invention. It burns well, requires little atten. tion, is simple in construction, and can be looked after by inexperienced workmen. It has, however, a defect which is inherent to all lamps which are regulated directly by a solenoid or electro-magnet placed in direct circuit with the lamp and the dynamo. The defect is this. If several lamps be placed on one circuit, the weakening of the current produced by the arc in any one of the lamps is found in practice to act upon the regulating apparatus of all of them, and then the carbons are brought nearer together and the length of the arc reduced where not wanted. In order to overcome this defect, Messrs. Siemens have devised another form of lamp, which we will now proceed to describe. F, G-38---Siemens Arc Lamp. The Siemens Differential Lamp. In the Siemens differential lamp the pendulum feeding arrangement is much the same as in the lamp already described. Instead, however, of its action being controlled by one solenoid, there are two for this purpose, one of them being, as before, in series with th..



Product Details
  • ISBN-13: 9781130397291
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 52
  • Spine Width: 3 mm
  • Width: 189 mm
  • ISBN-10: 1130397297
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 109 gr

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