A NEW WATER ELEVATOR.

Daily Telegraph (Napier), Issue 3176, 2 September 1881, Page 4

A NEW WATER ELEVATOR.

Robary machines for elevating water have been in use for a long time ; bufc hitherto they have generally consisted of an immovable cylinder, in which the water is circulated by rotating paddles until it acquires the centrifugal force necessary to elevate ifc through a pipe. he height attained by the water in this way has been about 100 ft,.; and with the rotary elevator of M. Gii'ad this lift is increased to 130ffc., the highest limifc yet reach Recently, however, a new machine was brought before the French Academy of Sciences, which is c.ipable of raising water to a much greater altitude. Ifc is the invention of M. de '-'omilly, and a labratory model worked by hand projects water to » height of 500 ft. T'uis centrifugal elevator consists of a flat horizontal cylinder or pan which is fed with the water to be elevated, and rotated very quickly round a vertical axis by means of a pulley. The motion of the pan causes the water to circulate in a ring round the internal walls of the pan, and a tube reaching down from the height to which the water is to be raised is brought into the pan, and terminated in a curved nozzle, which is turned towards the circulating liquor. The water, by virtue of its acquired momentum, rushes into the mouthpiece and rises up to the tube. In this case the turbine or pan is situated at the level of the source, but M. de Romilly also arranges for its being placed at tho level of the overflow, or some intermediate point. In the~ latter case the discharge tube, after leaving the pan, is bent downwards into the source of water, where its point, like a spigot into its faucet, enters a second tube, which rises again to the receiving cistern on the upper level. To work this arrangement some water is let into the pan by a supply pipe from the upper cistern, and the turbine is rotated. The flying water then enters the. tube leading downwards, and in its passage to the second tube sucks in the surrounding water from the source, which is thus carried upward to the elevated cistern, from which ifc is allowed to flow away,— ngineering.