Lamp equipped with magnets
OwnerShigeru Sugainventor
Life of this patent
Estimating the term…
Abstract
An electrically energized illuminating lamp having a bulb and a source of light within the bulb and emitting light through a portion of the bulb, and at least one magnet around the exterior wall of the bulb at a position other than the portion of the bulb through which light is emitted for attracting metal vapor and volatile matter generated inside the bulb during operation of the lamp and depositing them onto the interior wall of the bulb at a position corresponding to that of the magnet. Deposits are thus prevented on the interior wall of the bulb in light transmission areas thereof to reduce emission of light from the lamp. The lamp can be a mercury lamp or a filament type lamp such as an incandescent or halogen type lamp.
Claims7
An electrically energized illuminating lamp comprising a bulb and a source of light within said bulb and emitting light through a portion of said bulb, and at least one magnet around the exterior wall of the bulb at a position other than the portion of the bulb through which light is emitted for attracting metal vapor and volatile matter generated inside the bulb during operation of the lamp and depositing them onto the interior wall of the bulb at a position corresponding to that of the magnet, whereby deposits are prevented on the interior wall of the bulb in light transmission areas thereof to reduce emission of light from the lamp.
Dependencies are inferred from the claim text.