Aerostatic lighting device
First Claim
1. A lighter than air device comprising a helium containing balloon secured to the ground and enclosing a light source positioned approximately in the middle of the balloon, the balloon being secured on a rod (40) which mounts the light source, a power feeder cable being connected to the light source and mounted through the rod, the light source having a power of at least 1,000 watts, sufficient helium being employed for cooling purposes, the balloon being constructed of a thin, flexible and expandable polyurethane film which is transparent to the outward flow of light and heat radiation without damage to the balloon, and impervious to the helium, and an outer envelope surrounding the balloon and constructed of a colored material, with optical properties which enable the outer envelope to receive and diffuse light from the balloon, without dazzling a viewer, and providing effective ground based lighting over a ground surface area of at least 1,000 m2.
2 Assignments
0 Petitions
Accused Products
Abstract
A lighter than air lighting device is disclosed comprising a dual envelope balloon providing an inner, gastight, elastic, transparent, expandable polymeric envelope such as polyurethane, containing a lighter than air medium such as helium, and a replaceable lighting device such as a halogen or arc lamp. The helium thus functions to both elevate and cool the lighting device. The inner, transparent envelope is surrounded by an outer envelope such as a colored silk or nylon which functions as a diffuser to provide sufficient illumination without dazzling the user. The outer envelope may also be used to carry information and advertizing messages.
27 Citations
16 Claims
- 1. A lighter than air device comprising a helium containing balloon secured to the ground and enclosing a light source positioned approximately in the middle of the balloon, the balloon being secured on a rod (40) which mounts the light source, a power feeder cable being connected to the light source and mounted through the rod, the light source having a power of at least 1,000 watts, sufficient helium being employed for cooling purposes, the balloon being constructed of a thin, flexible and expandable polyurethane film which is transparent to the outward flow of light and heat radiation without damage to the balloon, and impervious to the helium, and an outer envelope surrounding the balloon and constructed of a colored material, with optical properties which enable the outer envelope to receive and diffuse light from the balloon, without dazzling a viewer, and providing effective ground based lighting over a ground surface area of at least 1,000 m2.
Specification