F - Mech Eng,Light,Heat,Weapons – 21 – S
Patent
F - Mech Eng,Light,Heat,Weapons
21
S
F21S 8/00 (2006.01)
Patent
CA 2048103
ABSTRACT PORTABLE UNDERWATER SWIMMING POOL LIGHT A portable light fixture which illuminates the volume of water in a swimming pool to create a pleasing night-time appearance. The light source and all attendant electrical hardware are mounted above the water's surface to avoid the normal measures required to waterproof the light. Light from this element is projected downward into the water through a light shaft which which hangs over the edge of the pool and extends down below the water line. This combined light transmission shaft and light element enclosure is opaque to prevent any light escaping above the water line and detracting from the pool illumination effect. It also acts as a stilling well to calm the air/water boundary where the light rays enter the pool. The light shaft is vented to allow water to rise within itself to the same level as in the swimming pool. Light travels down the light shaft, traverses the air/water boundary and then exits the light shaft below the water line, These light rays then strike a reflective light diffuser suspended directly below the shaft exit. The light diffuser is conical in shape and vertically bisected. It spreads the beam away from the pool wall by reflecting the vertical rays exiting the light shaft into a horizontal fan pattern. Safe power to the lighting element is supplied via a standard commercially available ground fault protector or low voltage transformer located at a distance from the pool area. A non-standard connector on the line from the remote power supply insures that only safe power can be connected to the light apparatus.
Kielland Peter Johann
Na
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