. Development and electrical distribution of water power . Fig. 34. 64 DEVELOPMENT AND DISTRIBUTION OF WATER POWER horizontal shaft by means of bevel gears and the arrangementis quite clear from the figure. The impulse turbine is but little used in the United States,although under certain conditions it is advantageous to install. Fig. 35. them. They differ from the previously described pressure turbinesin many respects, although they are very similar in their wheels themselves, or runners, are provided with a series ofcurved buckets which much resemble the form of buckets usedin pre
. Development and electrical distribution of water power . Fig. 34. 64 DEVELOPMENT AND DISTRIBUTION OF WATER POWER horizontal shaft by means of bevel gears and the arrangementis quite clear from the figure. The impulse turbine is but little used in the United States,although under certain conditions it is advantageous to install. Fig. 35. them. They differ from the previously described pressure turbinesin many respects, although they are very similar in their wheels themselves, or runners, are provided with a series ofcurved buckets which much resemble the form of buckets usedin pressure turbines. Instead, however, of water being admittedto all of the buckets, and the whole structure solidly filled, the wateris admitted to but few of the buckets, being carried to them andgiven its initial direction by one or more nozzles. Fig. 35 in-dicates the general arrangement of this form of water-wheel, asectional plan being shown. The water passes from the nozzleinto the wheel buckets and after passing through the latter is re-jected at atmospheric pressure. Since only a few of the bucketshave water passing through them—which in many instances doesnot fill the bucket space completely—and most of the buckets areentirely empty, it is, of course, impossible to use a draught tube andthat portion of the head,
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