Abstract: Underwater LED lights with enhanced cooling to allow the use of substantial numbers of high power LEDs. In all embodiments, the majority of the heat given off by the LEDs is transferred to the housing of the underwater light by heat transfer techniques other than by convection of the air or other gases within the enclosure, providing direct heat conveyance from the LEDs to or through the light enclosure walls, by conduction through a thermal conductor or by or as augmented by heat pipes to the inside wall of the enclosure or through the wall of the enclosure to the water. Various embodiments are disclosed.

Abstract: A multimedia presentation system a projector to project images toward an audience. A plurality of nozzles are partially submerged in a body of water at locations between the projector and the audience. The plurality of nozzles are located at different distances from the projector. Each of the plurality of nozzles is arranged to produce a fan like water mist onto which the projector projects images. A controller is coupled to the projector and the plurality of nozzles. The controller causes the projector to project images and at least one of the plurality of nozzles to produce a water mist in a synchronized sequence such that the images appear at different distances from the projector at different times. The controller may further control the orientation of each nozzle to vary the distance by inclining the plane of the water mist relative to the surface of the body of water.

Abstract: A fluid vortex display device includes a cylindrical vessel sealed at an upper end. A first fluid inlet is coupled to the cylindrical vessel adjacent a lower end of the vessel and directed at a substantial angle to an outer circumference of the cylindrical vessel. A discharge outlet of a pump is coupled to the fluid inlet. A closure is coupled to the lower end of the vessel. The closure includes a fluid outlet that is substantially spaced apart from a central longitudinal axis of the vessel. The closure may project into the cylindrical vessel to create an annular space adjacent the fluid inlet. The fluid outlet may be in the upper surface of the closure, which may not be perpendicular to the central longitudinal axis of the vessel. A support stand may support the vessel such that it is not perpendicular to a level foundation surface.

Abstract: An ice display device includes a chill tube and a piston that slides within the chill tube providing a fluidtight seal against the interior. The tube is filled with water and cooled to form an ice column. A shutter may selectively close the upper end of the chill tube with a fluidtight seal while the ice column is formed. The tube is warmed and the piston is lifted to an upper end of the tube to display the ice column. A plurality of water nozzles may selectively discharge streams of high pressure water inwardly to sculpt the ice column. An armature may extend upwardly from the piston to support and cool an interior of the ice column. The tube and armature may be cooled and warmed by a thermal transfer fluid. A device may be provided to induce turbulence in the thermal transfer fluid.