. Machinery and processes of the industrial arts, and apparatus of the exact sciences. cted of metalbelow. The measurement is made by means of a vessel having some-what the form of a double scoop; this being divided in the middle bya partition, and balanced upon a pair of pivots in such a manner asto tilt alternately from the one side to the other, when by the flow of thewater into the more elevated chamber the equilibrium is inventors have employed this mode of measurement for liquidsbefore 5 but as it requires that the measuring vessel shall not be immersed,it has not before
. Machinery and processes of the industrial arts, and apparatus of the exact sciences. cted of metalbelow. The measurement is made by means of a vessel having some-what the form of a double scoop; this being divided in the middle bya partition, and balanced upon a pair of pivots in such a manner asto tilt alternately from the one side to the other, when by the flow of thewater into the more elevated chamber the equilibrium is inventors have employed this mode of measurement for liquidsbefore 5 but as it requires that the measuring vessel shall not be immersed,it has not before been successfully applied to the case of water underpressure. Subjoined is the inventors description, which is sufficientlyexplicit to require no addition. Fig. 72 is a perspective view of the whole, the upper portion beingof glass, to allow a view of the interior. The small sections show, on a15 I A 226 PARIS UNIVERSAL EXPOSITION. larger scale, the device for supplying air. Fig. 73 is a vertical sectionof the whole, as ordinarily constructed of cast-iron. Fig. 72. J n 3SE sm i ( C. Cochranes Water Meter. A is the pipe which supplies the water, and B a receiving and retard-ing vessel bolted upon the top of the main case C. This vessel serves asa kind of air chamber, and allows the water to fall gently into the cupbelow. D is a cock, through which the water is discharged, and E E isthe surface of the water within: it being understood that the air above Eis at the density required to equal the pressure due to the head of water. WATER METERS COCHRANE7S. 227 Fig. 73. This density is acquired in the first instance, simply by the rise of thesurface E E, which thus compresses it. F is the rocking cup, and F thepartition therein. The cup being sup-ported on suitable bearings, its pivotis free to roll horizontally, to a slightextent, and thus to make the resist-ance a rolling rather than a slidingfriction. G is a lever, mounted inthe same frame with F, and imme-diately below it. It is s
Size: 1362px × 1836px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectmachinery, booksubjectscientificappa
