JPH034958A - Waterspout - Google Patents

Abstract

PURPOSE: To create an effect of drawing people's attention day and night by providing the device with control means for creating dynamic fountains by changing a pressurizing water source, a laminar flow nozzle and the trajectory of water flows under control. CONSTITUTION: An outlet orifice 34 is formed as a sharp angled edge not large in the area in contact with a high-velocity flow 22 and, therefore, the water flow 22 is made into not only laminar flow but a slag flow as well by the laminar flow nozzle 58. An arch is made higher or lower by changing the angle of the laminar flow nozzle 58 and regulating the water pressure. In such a case, an index table that a computer 86 uses in system control is formed by utilizing the empirical measurement for adjusting the pressure in such a manner that the arch enters a sink part 24. As the water flow is the slag flow, the respective unit lengths of the water flow are shot from the laminar flow nozzle and pass the discrete trajectories which well resemble the individual trajectories arriving at the sink part 24. The slag flow is constant in the velocity at which the flow crosses the flow area and, therefore, a water exchange does not occur between the adjacent water flows.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a fountain device.

BACKGROUND OF THE INVENTION The EPCOT Center at Disney World in Frock is equipped with a fountain system known as a Leapfrog fountain that uses laminar flow nozzles. The fountain device has a plurality of laminar flow nozzles spaced at various intervals across it. A laminar flow nozzle at each location sends laminar flow to an adjacent laminar flow nozzle. Each adjacent laminar flow nozzle is also a sink, and the laminar flow entering this sink has a structure that produces almost no droplets, allowing the water to be reused. Therefore, each nozzle sends a laminar flow in the form of an arc of constant height and width to the adjacent nozzle, the sink. Two laminar flow nozzles are provided at each nozzle location to allow laminar flow to be directed in either direction of the pattern as desired. By controlling the flow, the leavefrog-shaped display can be shaped like a sea serpent, with a fixed length of 1
It is also possible to have a stream of books emerge from the ground, arc through the ground at another point, and finally disappear into the ground.

By appropriately combining such laminar flows, it is possible to create unique fountain shapes that can be enjoyed by both children and adults. This was developed by the inventor of this patent for Disney. As a result, the assignee of the present invention has installed fountains of this generic type in locations around the world under licensing agreements with Disney.

(Problem to be Solved by the Invention) The purpose of the present invention is to expand the range of usage of the laminar flow nozzle with a new and different fountain device, thereby attracting people's attention both night and day, and to achieve a more unique effect. The goal is to make it possible to create.

(Means and operations for solving the problems) In order to achieve the above object, the present invention has the configurations described in claims 1 to 26.

A fountain device is disclosed that uses a laminar flow nozzle to create a dynamic arcuate display.0 Laminar flow appears to exit at various angles from a fixed point so that the display can change dynamically. The laminar flow nozzle is attached to an assembly that changes its angle and position. Control of the position and angle of the nozzle at the same time as controlling the pressure of the water supplied to it changes the flow to create a dynamic display and returns water to a fixed sink location regardless of the height of the water flow. You can do it like this. By intersecting the 6 laminar flows, which can be illuminated from within and given a changeable color as desired, making them glow like neon tubes, a cross-shaped water feature is obtained, and the color When two streams of water with different colors intersect, the area where they intersect becomes a third color.Features of the invention may be used individually or collectively in the same device, or in various combinations as desired. Can be used.

(Example) FIG. 1 shows an embodiment of the invention.

In this embodiment, a laminar flow nozzle 20 is positioned below the ground surface and the laminar flow 22 is directed upwardly arching to a "sink" section 24 which minimizes overspray. It receives a laminar flow and returns the water through the drain 26, allowing it to be filtered and reused by the device. The sink portion 24 can be of various shapes and can receive water in any desired manner, often with small rocks placed over a suitable screen to create a natural feel. As shown in FIG. 1, in this embodiment, a plurality of arch-shaped water streams 22 are used to form a canopy shape that can be used at the entrance of a shopping center or the like.

Details of the laminar flow nozzle used in the present invention are shown in FIGS. 8 and 9. The nozzle is provided with a cylindrical casing 28, with a water inlet 30 near its bottom for supplying pressurized water into the casing. Above the water inlet, means 31 are provided for forming a plurality of relatively small flow passages to eliminate turbulence and to straighten the flow, such as rigid open-cell shadow foam. On top of that is Blenheim 3
2, located below an outlet orifice 34 formed in the upper part of the cover 36 of the casing. The exit orifice is acutely angled so that the laminar flow exiting therefrom has little viscous drag. Water flow 22 is therefore not only laminar, but also, which is highly preferred for the invention, a slug flow. In other words, laminar flow is a flow in which local streamlines are parallel. This is contrasted with turbulent flow, where streamlines cross each other and the fluid within the flow mixes. In the case of almost perfectly laminar flow in a tube, the flow is almost parabolic, with the highest velocity in the center of the tube, progressively slower radially due to viscous resistance, and the flow at the tube wall. The speed of is O. On the other hand, the slag flow is
Not only is the flow laminar, i.e. the local streamlines are parallel to each other, but the velocity of all streamlines across the cross-section of the flow area is the same. A slug flow is generated by the laminar flow nozzles of FIGS. 8 and 9 because the orifice 34 has a sharp edge that does not have a large area of contact with the high velocity flow 22. Obviously perfect laminar flow and perfect slug flow cannot be achieved, only approached, and slug flow is preferred in the present invention, both because a good quality laminar flow is usually obtained and because many of the invention This is because the dynamic effect of the embodiment is improved by the slug flow, which will be described in detail later.

Next, the support structure of the laminar flow nozzle of the present invention will be explained with reference to FIGS. 2 to 7.

A transverse member 40 (′) to which a parallel base member 38 is welded
The base, which is maintained in a spaced-apart manner (see FIG. 3), is provided with a flange 42 for securing the assembly in the desired installation position. This base has
A pair of upright members 44 near one end and an inclined member 46 are tightly welded together to form a triangular shape with the base when viewed from the side. As shown in FIG. 4, which is a view taken in the direction of the plane of the member 46 along line 4--4 in FIG. 3, a rod end bearing 48 is fixed near the upper end of the member 46. Shafts 54 are inserted through these rod end bearings, and parallel members 50 (third and fifth
(see figure) is supported at the end of the shaft.

Mounted at the upper end of the member 50 is a further rod end bearing 56 which supports a laminar flow nozzle 58 and whose shaft-like projection 60 is connected to the laminar flow nozzle. Preferably, the laminar flow nozzle is supported approximately at its center of gravity, allowing rotation about rod end bearings 56 without significant imbalance. shaft 5
A counterweight 61, that is, a solid metal weight, is provided at the opposite end of the parallel member 50 so as to balance the weight of the laminar flow nozzle 58 about the axis formed by the rod end bearing 4 and the rod end bearing 48. (See Figure 3).

A wheel-shaped member 62 is fixed to the member 46 (see especially FIGS. 3, 5, and 6), and this wheel-shaped member has a clearance portion 64 for passing one cross member 52. is provided. Wheel-shaped member 62
A wheel 66 is attached to the nozzle 58 so that as the wheel 66 rotates, the laminar flow nozzle 58 also rotates about the axis of the rod end bearing 56. It is fixed.

The wheel-shaped member 62 and the wheel 66 are connected by a stainless steel belt 68, and as shown in the drawing, the belt 68 is connected to the wheel-shaped member 62 at one end 70.
and is wound clockwise around the wheel 66, then returned to the wheel-like member 62 and secured with an adjustable fastener 72. , pulling the belt against a spring 74 located between the fastener and the stainless steel belt 68 so as to provide the desired tension on the belt. To prevent the belt from slipping relative to the wheel 66, the belt is securely secured to the wheel 66 by a clamp bolt 76 which securely secures the belt in a fixed position on the wheel 66.

Due to the above structure, a laminar flow nozzle 58 is provided at one end,
It will be seen that the assembly, with the counterweight 61 attached to the other end, is in a balanced state and is rotatable within an angle about the shaft 54.
When rotating in this way, if the wheel 66 and the wheel-shaped member 62 have the same diameter, the first flow nozzle 58 swings while drawing a circular arc, but since no rotation about its center of gravity occurs at all. , the position of the origin of the laminar flow changes, but its angle does not change, whereas the wheel 66
is smaller than the wheel-like member 62, the action of the belt 68 causes the entire structure to rotate about the shaft 54 and the laminar flow nozzle to rotate about its center of gravity. This is illustrated in FIG. 6, where the laminar flow nozzle rotates counterclockwise relative to the fixed base when the assembly with the laminar flow nozzle mounted thereon rotates in a clockwise direction about the axis of shaft 54. are doing. For this reason, the sixth
As shown, the laminar flow 22 exiting the laminar flow nozzle when the assembly is in the two particular mounting orientations is above the nozzle by an amount determined by the relative dimensions of the wheel 66 and the wheel-like member 62. It passes through spatial point 78. As the relative position of the assembly changes, the angle of the laminar flow 22 also changes, but it still passes through point 78, so if this point 78 is set at the ground level, laminar flow can be controlled by controlling the position of the assembly. It can be made to appear as if it is coming from a fixed point on the ground surface while changing the angle as desired.

To control the assembly, a pneumatic cylinder is installed between one cross member 40 on the fixed frame assembly and a pin 82 (see especially FIG. 4) inserted through a clevis-like member 84 welded to the cross member 52 of the rotating assembly. 80 are connected. Since the axis of the bin 42 is effectively below the axis of the shaft 54, which is the center of rotation of the assembly, extending the pneumatic cylinder causes the assembly to rotate counterclockwise, and vice versa. These various above-described components are also shown in FIG. 7, which is a view taken along line 7--7 of FIG. 6.

The control of the system is shown schematically in FIG. A computer 86, typically a personal computer such as an IBM PC or PC compatible computer, controls the pressure of water supplied from pump 88 to laminar flow nozzle 58 by means of a suitable controller 90. Similarly, the supply of pump 92 to pneumatic cylinder 80 is controlled by controller 94 . In general, these controls may be of any known type for such purposes. - For example, water to a laminar nozzle can be controlled based on the desired pressure in the laminar nozzle casing or on the pressure measured at a representative point in the supply line feeding the laminar nozzle. ,controls the flow of water sent from the pump to the laminar ,flow nozzle. Alternatively, the desired pressure or Water flow may be controlled to obtain a profile.

Although it is possible to control the pump 88 itself to vary the pressure, it is generally more difficult than operating the pump at a constant power level to control water flow. Similarly, control of the pneumatic cylinder 80 may utilize position feedback such that the difference between the commanded position from the computer 86 and the actual position of the pneumatic cylinder is processed by the controller 94, or the pneumatic cylinder is often placed at a known position. This ensures that the position of the pneumatic cylinder does not drift over time due to inaccurate control due to the lack of position feedback. In this connection, a turnbuckle-shaped adjustment device 96 (
7) is provided at the connection between the pneumatic cylinder 80 and the rotating assembly to allow manual adjustment to match the known pneumatic cylinder position and the desired corresponding laminar flow orientation.

Next, with reference to FIG. 10, the advantages and effects of the above device will be explained. As shown, a laminar flow 22 exits the nozzle assembly 20 in an upward direction, travels in a curved manner, and falls into a sink portion 24. The laminar flow 22 can be made into an irregular shape simply by changing the pressure of the water supplied to the laminar flow nozzle, but depending on how the pressure inside the laminar flow nozzle is changed, the point at which the water falls may fluctuate near the sink 24. ,
Sometimes it's in front of you, sometimes it's past you.

However, by controlling both the pressure in the laminar flow nozzle and the angle of flow, the laminar flow 22 can be shaped as shown in FIG. It can be dropped. This can be explained as follows.

In FIG. 1, the monolaminar flow 22 has a parabolic shape, exiting the laminar flow nozzle 20 and entering the sink portion 24. However, the illustrated arch is only one of a series of arches exiting the laminar flow nozzle 20 and entering the sink portion 24; the other arches are designed to allow the water to reach the sink portion and sink as needed. By changing the angle of the laminar flow nozzle and adjusting the water pressure via the device described above, it is possible to make the flow higher or lower than this. In this regard, the relationship between the pressure and the angle of the laminar flow nozzle or the position of the device controlled by the pneumatic cylinder 80 can be calculated. Preferably, experimental measurements of setting the angle and adjusting the pressure as the arch enters the sink portion 24 are used to create a lookup table for use by the computer in system control. Because it is a slug flow, each unit length of water flow is much like an individual bullet fired from a laminar nozzle, following a separate trajectory and reaching the sink portion 24, and the slug flow has a velocity across the flow area. Since is constant, there is no water exchange between adjacent water flows passing through each path, so it is not affected much by the parts of the water flow before and after it.
This is why slug flow is preferred in the present invention, since such exchange occurs in well-defined laminar flows with high velocity in the middle, especially in the case of dynamic water flows such as that shown in Figure 1O. The glass rod-like feature is lost.

From the above discussion, it can be seen that the portion 96 above the water stream 22 is fired from the laminar nozzle at an angle and pressure corresponding to the arch 98 shown in dotted lines, i.e. a relatively high pressure and high angle arch. , it becomes clear that a water flow section 100, not far from section 96, together with sections 104 and 106, lies on a much lower arch 1 (12) fired from the laminar nozzle at a low angle and under low pressure.section 96 Of course, proceeding along trajectory 98, part 10
0.104 and 106 also travel along trajectory 102 and all enter sink portion 24 at approximately the same point. Naturally, the portion of the water flow that passes through the intermediate trajectory follows that intermediate trajectory and also enters the sink portion 24 at the same point. In this way, the first
As is clear from Figure 0, when the angle of the water flow changes within a certain range, the amount by which the water "swings" increases until it reaches the top of the trajectory, then decreases until it enters the sink. Sometimes it appears to be 0. However, this does not limit the instantaneous contours shown in Figure 10; each part of the contour at any instant represents a portion of the water stream fired at each time; The angle change in the rising or falling part of the water flow may be greater than that in the upper part of the trajectory.

Other features of the invention will be described with reference to FIGS. 6, 8 and 9. As shown in particular in FIGS. 8 and 9, an optical fiber bundle passes through the wall of the laminar flow nozzle 58 and extends coaxially with the water stream 22 upwardly through the straightening means 31 and at its upper end. 110 is the exit orifice 34 of the laminar flow nozzle
It is located slightly lower. Thereby, the light coupled to the optical fiber bundle can be sent along the laminar flow 22, and the laminar flow becomes a thick light pipe. In particular, the light emitted from the optical fiber bundle is scattered within a narrow range, and since the outer surface of the laminar flow 22 is smooth like a glass rod, the light is reflected at the water/air interface, so the water/air The zero-laminar flow that travels along the laminar flow while being reflected repeatedly at the joint surface is not perfect and may curve, so some of the light that travels along the flow has a high incident angle to the water/air joint surface. Because it is not reflected and "leaks" from the surface of the water/flow, the final effect is that the laminar flow glows along its entire length with the color of the light supplied to it, creating a very unique and magical nighttime display. As shown in FIG. 6, the color wheel 112 can be controlled by a computer 86 to create a continuously changing color stream or to command color changes as part of its presentation in synchronization with the movement of the laminar flow. Alternatively, the color and movement of the water stream can be synchronized with further events, such as music, if desired.

Next, referring to FIG. 11, another display that can be achieved by the present invention will be described. In this case, two laminar flow nozzles 20 fire laminar flows 22a and 22b upwardly from opposite ends of the same arch, colliding at the top and fanning outward at section 116. By supplying water at the same pressure to the two laminar flow nozzles and controlling their orientation together, the laminar flow
2 can be moved up and down, or symmetrically rocked as shown in FIG. 10, and the fan-shaped portion 116 can be moved up and down accordingly. , or by varying both pressure and angle, you can create interesting movements. pressure,
By changing the angle and nozzle position simultaneously,
A water stream appears from two points, and there are two points in the air regardless of the trajectory.
Adaka, through two fixed points. Also, each water stream will now be suspended to one of its respective points, and you can even cause them to collide as described above. If the two laminar flows are illuminated with different colors of light, for example, as shown in Figure 12, if the laminar flow 22a is illuminated red and the laminar flow 22b is illuminated green, the two laminar flows will shine in their respective colors. , in the fan-shaped portion 116, the two colors are mixed to form a yellow fan-shaped portion. In some cases, if the fan-shaped portion 116 is not placed in the center as shown in FIG. 11, but is largely offset to one side of the display, the same curve becomes a pine mushroom shape due to the action of gravity. In either case,
Since the laminar flow is a slug flow, the fan-shaped portion 116 is shaped into a relatively clean shape except for a portion far away from the collision point where the fan-shaped portion 116 widens and water becomes small droplets due to surface tension at its outer periphery. .

In some cases, complementary laminar flow nozzle installations can produce the desired effect by changing the pressure of the water delivered to the laminar nozzle without changing the angle. The resulting laminar flow exhibits interesting oscillations that change over time, as intended.

Also, in this case the water flow does not fall at a fixed distance from the laminar nozzle, the distance being determined by the nozzle supply water pressure when each part of the water flow leaves the nozzle orifice, but for example in a pond where the water flow is quite large. There is no problem if the water falls onto a patio deck with a suitable drainage system, such as an open connected paved terrace deck with sufficient drainage channels between the deck slabs. While it is possible to achieve interesting effects with a single laminar flow nozzle in this way, multiple nozzles driven by a common variable pressure water source can be installed side by side to synchronize the movement of each of the multiple water streams. You can create even more interesting displays.

A new and unique fountain device has been described that utilizes a laminar flow nozzle, preferably a laminar flow nozzle that generates a slug flow, to achieve various decorative and recreational effects. Although various embodiments of the invention have been described above, those skilled in the art will recognize that changes may be made in form and detail without departing from the scope of the invention.

Advantages of the Invention The present invention includes an assembly for changing the angle and position of the laminar flow nozzle, so that the laminar flow exits from a fixed point at various angles and the display can be dynamically changed. In addition, by controlling the water pressure and simultaneously controlling the position and angle of the nozzle, it is possible to change the flow and make it possible for the water to return to the sink portion at a fixed position regardless of the height of the water flow.

Additionally, by internally illuminating the laminar flow, it can be colored as desired and glow like a fluorescent tube. By intersecting laminar flows, a cross-shaped water feature is obtained, and when two water flows of different colors intersect, the area where they intersect and spread becomes a third color. The features of the invention can be used individually or collectively in the same device or in various combinations as desired.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a fountain device according to the present invention, FIG. 2 is a top view of a laminar flow nozzle and support device in an embodiment of the present invention, and FIG. 3 is a view taken along line 3-3 in FIG. Figure 4 is a partial side view taken along line 4-4 in Figure 3, Figure 5 is a partial cross-sectional view taken in the same manner as Figure 3, and Figure 6 is a layered A schematic block diagram illustrating the movement of the flow nozzle and its support structure as well as the system for controlling it; FIG. 7 is a partial cross-sectional view taken along line 7-7 of FIG. FIG. 3 is a partial cross-sectional view of a laminar flow nozzle. 9 is a partial cross-sectional view of the laminar flow nozzle taken along line 9--9 in FIG. 3; FIG. 1O is a schematic diagram showing a dynamic fountain device in an embodiment of the present invention; FIG. Other Fountain Devices of the Invention FIG. 12 is an enlarged view of the intersection of the two laminar flows in FIG. 11.

Claims (26)

[Claims] (1) A pressurized water source, a laminar flow nozzle that sends out a laminar flow in a trajectory that can be seen by visitors to the fountain, and a control means that can create a dynamic fountain by controlling and changing the trajectory of the water flow. A fountain device that has. (2) The control means is a means for changing the trajectory sufficiently rapidly and in a controlled manner so that each part of the water flow can be positioned on widely different trajectories at the same time. fountain device. (3) The fountain device according to claim 2, wherein the laminar flow nozzle is a means for generating a slug flow, so that the laminar flow exiting from the laminar flow nozzle is also substantially a slag flow. (4) The fountain device according to claim 2, wherein the control means is a means for controlling the pressure of water sent to the laminar flow nozzle. (5) The fountain device according to claim 2, wherein the control means is means for changing the elevation angle of the laminar flow nozzle. (6) The control means is means for changing the elevation angle of the laminar flow nozzle and at the same time changing the position of the laminar flow nozzle, whereby the local elevation angle of the laminar flow changes within a certain range. 6. The fountain device of claim 5, wherein the laminar flow substantially passes through a first fixed point in the air remote from the laminar flow nozzle outlet, regardless of the fact. (7) The control means is means for controlling the pressure of water sent to the laminar flow nozzle while changing the elevation angle of the laminar flow nozzle, whereby each part of the laminar flow is controlled regardless of its trajectory. By making it almost pass through a second distant point in the air, it was possible to make it appear that the laminar flow starts from the first fixed point and returns to the second fixed point, regardless of the trajectory of the intermediate part. Claim 6
The fountain device described in . (8) The fountain device according to claim 7, wherein the laminar flow nozzle is a means for generating a slug flow, so that the laminar flow exiting from the laminar flow nozzle is also substantially a slag flow. (9) The fountain device according to claim 8, further comprising a light source means provided within the laminar flow nozzle and transmitting light substantially along the axis of the laminar flow emitted from the laminar flow nozzle. (10) The fountain device according to claim 1, further comprising a light source means provided within the laminar flow nozzle and transmitting light substantially along the axis of the laminar flow emitted from the laminar flow nozzle. (11) a source of pressurized water and a fountain located at separate locations to direct the substantially laminar flow from one side toward the laminar flow from the other so that viewers of the fountain can see them colliding; 1 and 2 laminar flow nozzles; A water fountain device that changes the collision position of two water streams by simultaneously controlling and changing the trajectory of the water streams from the first and second laminar flow nozzles. (12) The fountain device according to claim 11, wherein the control means is a means for controlling and changing the trajectory sufficiently rapidly so that each part of the water flow is simultaneously located on a significantly different trajectory. (13) The fountain device according to claim 12, wherein the laminar flow nozzle is a means for generating a slug flow, so that the laminar flow exiting from the laminar flow nozzle is also substantially a slag flow. (14) The fountain device according to claim 12, wherein the control means is means for controlling the pressure of water sent to the laminar flow nozzle. (15) The fountain device according to claim 12, wherein the control means is means for changing the elevation angle of the laminar flow nozzle. (16) The control means is means for changing the elevation angle of the laminar flow nozzle and simultaneously changing the position of the laminar flow nozzle, whereby the local elevation angle of the laminar flow changes within a certain range. 16. The fountain device of claim 15, wherein the laminar flow substantially passes through a first fixed point in the air remote from the laminar nozzle outlet, regardless of whether or not the laminar flow exits the laminar flow nozzle. (17) The control means is means for controlling the pressure of water sent to the laminar flow nozzle at the same time as changing the elevation angle of the laminar flow nozzle, whereby each portion of each laminar flow is controlled regardless of its trajectory. By approximately passing through each of the second, separate points in the air, the laminar flow starts from the first fixed point and follows separate trajectories, passing through the two points in the air and ending at a point between them. Claim 16 The display is made to appear to be in conflict.
The fountain device described in . (18) The fountain device according to claim 17, wherein the laminar flow nozzle is a means for generating a slug flow, so that the laminar flow exiting from the laminar flow nozzle is also substantially a slag flow. (19) The fountain device according to claim 18, further comprising a light source means provided within the laminar flow nozzle and transmitting light substantially along the axis of the laminar flow emitted from the laminar flow nozzle. (20) The fountain device according to claim 11, further comprising a light source means provided within the laminar flow nozzle and transmitting light substantially along the axis of the laminar flow emitted from the laminar flow nozzle. (21) a pressurized water source, a laminar flow nozzle that sends out a laminar flow in a trajectory that is visible to a visitor to the fountain, and a light source that is provided within the laminar flow nozzle and sends light substantially along the axis of the laminar flow that is emitted from the laminar flow nozzle. have the means,
A fountain device whereby at least a large portion of the total length of the laminar flow appears to be illuminated. (22) Claim 2, wherein the light source means is a color light source means.
1. The fountain device according to 1. (23) The light source means is provided with an optical fiber bundle whose one end is disposed adjacent to and substantially coaxial with the laminar flow nozzle outlet, so that light entering from the other end of the optical fiber bundle is transmitted to the laminar flow nozzle. 22. The fountain device according to claim 21, wherein the water fountain is sent along and substantially coaxially with the water stream emitted from the stream nozzle. (24) a source of pressurized water and a water source located at separate locations that directs the substantially laminar flow from one side toward the laminar flow from the other so that viewers of the fountain can see them colliding; first and second laminar flow nozzles; and a light source means disposed within the laminar flow nozzle for transmitting light substantially along the axis of each laminar flow emitted therefrom, thereby providing light source means for transmitting light substantially along the axis of each laminar flow emitted from the laminar flow nozzle. A fountain device that appears to be mostly illuminated. (25) The fountain device according to claim 24, wherein the light source means is a color light source means that can change color. (26) The light source means is provided with an optical fiber bundle, each of which has one end adjacent to and substantially coaxial with the laminar flow nozzle outlet, and the optical fiber bundle enters from the other end of the optical fiber bundle. 24. Light is transmitted along and substantially coaxially with the water stream emitted from the laminar nozzle.
The fountain device described in .