| 摘要 |
An ornamental fountain assembly includes a nozzle support housing which defines an internal chamber. Water inlet duct means communicate with the chamber. The chamber has a height along a vertical axis of the assembly which is at least equal to the diameter of the duct means adjacent the chamber. The chamber has a cross-sectional area in planes normal to the axis which is at least twice the effective water flow area of the duct means adjacent the chamber. A fountain nozzle is carried by the housing coaxially of the chamber and communicates with the chamber through the upper boundary thereof. The nozzle has a liquid inlet opening of area less than the cross-sectional area of the chamber. Liquid flow controlling and directing means are associated with the path of the water flow through the chamber from the opening of the inlet duct means to the chamber to the inlet of the nozzle. The liquid flow controlling and directing means are proportioned and arranged for causing liquid flowing along the path at the nozzle inlet to have an essentially axial flow characteristic and an essentially uniform liquid flow pattern. The flow controlling and directing means include the above-mentioned proportioning of the chamber relative to the inlet duct means and the nozzle inlet areas; this means also includes vertically disposed perpendicularly intersecting baffle members in the chamber arranged symmetrically about said axis.
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