Illumination – Light modifier – Refractor
Patent
1998-10-09
2000-08-08
Schuberg, Darren E.
Illumination
Light modifier
Refractor
362186, 362333, 313271, 313272, F21L 700, H01J 188
Patent
active
060991488
ABSTRACT:
An airway obstruction luminaire has a luminaire base; a substantially cylindrical Fresnel lens having a lens axis; a halogen lamp having a lamp base, and a substantially linear filament; and a lamp bracket which positions the lamp such that a filament axis of the filament is coincident with the lens axis. The filament is energized by a power supply connected to a first filament end and second filament end, which are separated by an effective length l.sub.E of less than 1 inch. The filament is preferably formed as a helical coil. The lamp is designed to operate at a lamp rated voltage V.sub.L between about 12 and 30 volts. The power supply voltage V.sub.P is reduced if V.sub.P is greater than V.sub.L. The second filament end is supported by a second end support structure configured to reduce shadowing. The lens is preferably an acrylic plastic lens fabricated by injection molding. The axial position of the lamp with respect to the lens may be adjusted by placing shims between the lamp base and the lamp bracket. The luminaire may be designed to meet the FAA requirements for type L-810 or type L-864 devices, and in the latter case is provided with a flashing circuit for periodically interrupting power to the lamp.
REFERENCES:
patent: 3731082 (1973-05-01), Blaylock
patent: 4360862 (1982-11-01), Strasser et al.
patent: 4717991 (1988-01-01), Murphree, Jr.
patent: 5335157 (1994-08-01), Lyons
"Electric marine lantern type EE 380 N", Pintsch bamag Dinslaken catalog, Jul. 1998.
"Electric Marine Lantern type EE 155 N", "Electric marine lantern (with acrylic lens and acrylic cover) type EE 250 N", "Electric marine lantern type EE 380 N", "Mole head light type WF-300", Hazard Warning Beacon type GF-300, from Pintsch Bamag Dinslaken catalog labelled "Jul. 1998".
"Report of Test on Intensity Distribution Measurements of a 300-mm Hazard or Code Beacon When Lamped With Six Types of Incandescent Bulbs", U.S. Department of Commerce, National Bureau of Standards, Washington, DC, 1974 .
Mandeville George J.
Northrup Richard M.
Assaf Fayez
Flash Technology Corporation of America
Schuberg Darren E.
Semprebon Jeffrey E.
Weins Michael J.
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