DEVICE FOR SHUTTING OFF AMBIENT AIR IN NONELECTRODE LIGHTING SYSTEM AND NONELECTRODE LIGHTING SYSTEM Russian patent published in 2004 - IPC

FIELD: nonelectrode lighting systems. SUBSTANCE: device has waveguide with hole to receive stem large enough to allow bulb stem to pass though this hole; bulb motor mounted on rear end of waveguide and connected to bulb disposed on front end of waveguide using bulb stem designed for bulb rotation; sealing means installed between bulb motor and waveguide and designed to shut off ambient air passage toward bulb, that is to ensure sealing of structure to such extent that air admission to light emitting area accommodating reticular screen is eliminated with the result that pollution of light-emitting area is excluded thereby ensuring clean conditions for light emission. EFFECT: reduced oxidation of reticular screen, enhanced operating stability of lighting device, reduced maintenance charges. 10 cl, 7 dwg