DISCHARGE LAMP

DISCHARGE LAMP

A discharge lamp includes an emitter other than thorium, which is added to a cathode in a luminous tube. Early depletion of the emitter due to excessive vaporization of the emitter from the cathode is prevented, while achieving stable lighting even at the start-up of the lighting. A main body part (...

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Hauptverfasser: OTOSHIMA, Yuki, TAGAWA, Yukiharu, FUNAKOSHI, Mitsuo, YASUDA, Yukio, ARIMOTO, Tomoyoshi, IWABAYASHI, Hirohisa
Format: Patent
Sprache:eng ; fre ; ger
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BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
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creator OTOSHIMA, Yuki
TAGAWA, Yukiharu
FUNAKOSHI, Mitsuo
YASUDA, Yukio
ARIMOTO, Tomoyoshi
IWABAYASHI, Hirohisa
description A discharge lamp includes an emitter other than thorium, which is added to a cathode in a luminous tube. Early depletion of the emitter due to excessive vaporization of the emitter from the cathode is prevented, while achieving stable lighting even at the start-up of the lighting. A main body part (31) of the cathode (3) is made from a high-melting-point metal material that contains no thorium, and a front end part (32) thereof is made from a high-melting-point metal material that contains an emitter (other than thorium). A sintered compact (34), which contains an emitter (other than thorium) at a concentration higher than the emitter contained in the front end part (32), is buried in a sealed space (33) that is formed within the main body part (31) and/or the front end part (32). The sintered compact (34) abuts against the front end part (32).
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subjects BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
title DISCHARGE LAMP
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