The water supply of towns and the construction of waterworks : a practical treatise for the use of engineers and students of engineering / by W.K. Burton ; to which is appended a paper on the effects of earthquakes on waterworks by John Milne.

Date:
1894
Catalogue details

Licence: Public Domain Mark

Credit: The water supply of towns and the construction of waterworks : a practical treatise for the use of engineers and students of engineering / by W.K. Burton ; to which is appended a paper on the effects of earthquakes on waterworks by John Milne. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    some makers of meters advertise their sizes as capable of measuring quantities of water that they are not capable of measuring without considerably reducing the pressure. This is done to make their prices compare favourably with those of other makers who are more scrupulous. Kennedy's patent water meter, which is illustrated in section here (Fig. 232), may be taken as typical of positive meters. It will be seen that it consists essen- tially of a cylinder and piston. The piston is actuated by the water, and there is a train of wheels, with dials and pointers, that keep a record of the number of strokes made, exactly as in the case of an engine counter. The number of single strokes, multiplied by the capacity of the cylinder, less the clearance, and the cubic- capacity of the piston is, of course, the consumption of water in any given time. The first, or one of the first inventors of inferential meters were Messrs. Siemens and Halske, whose meter in its most recent form is illus- trated by Figs. 233 and 234. The arrows show the direc- tion in which the water flows. The openings b, b, are tan- gential, and the water flow- causes the to revolve with a Fig. 2.32.—Kennedy's patent water meter. ino- through them vanes velocity that ought to be proportionate to the discharge of water, that is so to all intents and purposes for any but very small dis- The vanes actuate the spindle c, and this, in its turn, charges.