General Books publication date: 2009 Original publication date: 1901 Original Publisher: D. Van Nostrand Subjects: Electric lighting Notes: This is a black and white OCR reprint of the original. It has no illustrations and there may be typos or missing text. When you buy the General Books edition of this book you get free trial access to Million-Books.com where you can select from more than a million books for free. Excerpt: CHAPTER III. Direct Current Dynamos. Direct current dynamos are divided according to the number of poles in the field-magnet into two classes, known respectively as bipolar and tnvltipolar; the bipolar having only two field-poles, and the mnltipolar any number more than two. A few leading dynamos of each class will illustrate the different methods of construction; and the bipolar being the simplest, and the type employed in illustration of the principles of the dynamo, in the previous chapter, may appropriately be described first. The Excelsior Dynamo. -- This dynamo, as recently improved by its original inventor, William Ilochhausen, is shown in Figs. 12 and 13, which represent the largest size made, capable of lighting 100 arc lamps, of 2000 candle-power each. Its armature core is constructed of iron wire, wound on a cast-iron frame having a T section which divides it into two equal parts, as viewed edgewise. This core is mounted on a spider attached to the shaft, the arms of which are insulated from the core. The armature is of the Gramme, or ring, type, and, in machines of the size here shown, is 30 inches in diameter and 8 inches thick, and has 160 pounds of No. 16 insulated copper wire wound on its core, in 36 coils as shown. These coils are rectangular, each being 8 inches square, and are sepa- rated from each other by wooden wedges attached to the cast-iron frame, to the outer ends of which are screwed blocks of insulating fibre which hold the coils in position. Mg. 12. The field-magnet consists of a vertical cast-iron yoke,...
About the Author :
Philip Atkinson has contributed to The Elements of Electric Lighting; Including Electric Generation, Measurement, Storage, and Distribution as an author.
Philip Atkinson has been a director of Transformations UK, a management consulting company specializing in leadership, change and post-acquisition integration. He has worked with such companies as CNH Global in Wichita, Kansas and General Electric in Crottonville, New York. The author of five books, he consults regularly in the U.S. and Europe. He lives in England.
|Title:||The Elements of Electric Lighting; Including Electric Generation, Measurement, Storage, and Distribution||Publisher:||General Books|
|No. of Pages:||134|
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