Science for beginners . Fig. 294.—The undershot Fig. 295.—The Pelton wheel or wheel. impulse wheel. 586. Impulse Wheels.—Impulse wheels are used whenthere is a small supply of water but available under a greathead or pressure. Frequently small streams or lakes lo-cated high up in a mountain may be utilized for power pur-poses. In such cases the water is often conveyed down themountain side in strong iron pipes. At the foot of the moun-tain, the water under high pressure is permitted to escapethrough a nozzle at high velocity. This stream is directedagainst cup-shaped buckets on the rim of the
Science for beginners . Fig. 294.—The undershot Fig. 295.—The Pelton wheel or wheel. impulse wheel. 586. Impulse Wheels.—Impulse wheels are used whenthere is a small supply of water but available under a greathead or pressure. Frequently small streams or lakes lo-cated high up in a mountain may be utilized for power pur-poses. In such cases the water is often conveyed down themountain side in strong iron pipes. At the foot of the moun-tain, the water under high pressure is permitted to escapethrough a nozzle at high velocity. This stream is directedagainst cup-shaped buckets on the rim of the wheel (). After striking the buckets, the water falls to theground robbed of its energy. These wheels have some advantages over other kinds ofwaterwheels: They can easily be changed in location. Theyare small compared with other wheels for the amount of SOME COMMON MECHANICAL MOTORS 493 power they are able to produce. One such, wheel constructedseveral years ago was but 3 ft. in diameter and received its KA
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscience, bookyear1921
