| 摘要 |
PURPOSE:To enable to omit an enclosing body for a starter lamp, by flowing in an inert gas of low heat-conductivity such as argon, krypton, or xenon, into the starter lamp, in the process of bonding a luminous tube and the starter lamp to the outer tube. CONSTITUTION:Although nitrogen gas is ordinarily introduced into the atmosphere in the outer tube in the bonding process, through an exhaust pipe 14, in order to form a base inserting member sufficiently by a groove 16, at least one or more of argon, krypton, and xenon, or a mixture of nitrogen gas and one or more of those rare gases is used for this purpose to introduce into the outer tube 1. Since the rare gases such as argon, krypton, and xenon are of heat-conductivity lower than that of nitrogen gas, the temperature of the outer tube 1 atmosphere will not rise, causing to control the temperature rise of the starter lamp 8 in this process. Therefore, the pulse generating property of the starter lamp 8 is stabilized without furnishing an enclosing body, and a trouble of decreasing pulse generating frequency owing to furnishing no enclosure is avoided.
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