10-10-1902 дата публикации
Номер: GB0190120214A
20,214. Thorp, T. Oct. 10. Meters.-The gas to be measured passes through a cylindrical chamber a, entering through a lightly loaded non-return valve b. At the top of the chamber is mounted a turbine wheel c, with inclined vanes, and below this wheel is a baffle-plate d, the central part of which is solid and supports the wheel spindle. The spindle is preferably supported upon a hardened steel or iridium pivot which enters a jewelled recess in the end of the spindle. Between the centre part of the plate d and the chamber a are formed a number of guide-passages e, either by casting or by fitting with partitions. In the case of large meters and where a back flow of the gas may occur, a liner h<1>, provided with a flange h<4>, is adjustably fitted within the chamber, and has an external flange h<5>, with one or more perforations, fitting against the wall of the chamber. The liner may be adjusted by means or screws. The chamber is placed within a casing provided with an inlet l<1> and an outlet l<2>, suitable partitions being arranged to direct the gas through the chamber. A plate f supports the registering-mechanism, which is operated by the wheel spindle, and a casing n, provided with a glass face, encloses the same. Pillars a' may extend from the plate f to keep the chamber in position in the casing, a leather washer being interposed between the chamber and casing. In operation, should the valve b lift slightly, gas passes between the liner h<1> and the chamber wall and by way of the perforations in the flange h<5> and the passages e, and then impinges on the vanes of the wheel c and causes it to rotate. When the current is larger, the valve b is more fully opened, and the gas passes through the centre of the chamber and by way of the passages e to the wheel. A baffle-plate &c. i is preferably arranged within the chamber to permit the current to be distributed over the whole area of the channels and vanes. A meter ...
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