Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances . WATER SUPPLY 163 small air leaks that may develop in the joints, which allow theair to escape. To overcome the possibility of these occurrences,arrangement is made whereby air may be pumped into the tankby the same pump as that which supplies the water. In thisway, the air is introduced with the water, which bubbles upthrough it to the surface. If at any time the pressure in the tankis lost, it may be replaced by pumping air alone into the tank. Power Water-supply Plants.—Where the
Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances . WATER SUPPLY 163 small air leaks that may develop in the joints, which allow theair to escape. To overcome the possibility of these occurrences,arrangement is made whereby air may be pumped into the tankby the same pump as that which supplies the water. In thisway, the air is introduced with the water, which bubbles upthrough it to the surface. If at any time the pressure in the tankis lost, it may be replaced by pumping air alone into the tank. Power Water-supply Plants.—Where the pump is expectedto furnish water to any considerable amount beyond that forhousehold use, it is desirable that the plant be the work of watering stock, lawn sprinkling, etc., is intended,. Fig. 146.—Tank pump operated by a small gasoline engine. the tank and pump must be enlarged to suit the desired amountof water, and a gasoline engine, windmill or electric motor willbe used for power. Where local conditions will permit, ahydraulic ram may be substituted for the pump and the pressuretank used for additional pressure and storage. Fig. 146 shows a plant in which the pump is driven by agasoline engine. In the figure, the engine E is shown connectedby a belt to a speed-reducing device or ^^jack,^ marked J. Theobject of this machine is to reduce the speed of rotation andcharge it to the required motion for operating the pump. The 164 MECHANICS OF THE HOUSEHOLD jack is connected to the pump by a rod attached to a large gear,so as to produce the desired crank motion; and the opposite endof the rod is attached to the pump handle. The rod may bedetached at any time and the pump worked by hand. Electric Power Water Supply.—Fig. 147 shows another typeof power plant in which a
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorkmcgrawhillb
