Preform for fluorescent lamp, fluorescent lamp prepared by the s

Details Preform for fluorescent lamp, fluorescent lamp prepared by the s Preform for fluorescent lamp, fluorescent lamp prepared by the s

1997-10-03

1999-08-03

O'Shea, Sandra

Electric lamp and discharge devices

With gas or vapor

Having electrode lead-in or electrode support sealed to...

313625, 445 26, H01J 1718

Patent

active

059329700

ABSTRACT:
There is provided a preform for a fluorescent lamp comprising a bulb and a stem provided with a filament and a discharge electrode and a fluorescent lamp prepared by the preform without an exhaust pipe for use as an indicating lamp, the fluorescent lamp being sealed after exhausting inside air and charging inert gas and mercury through an appropriate space formed between the bulb and the stem inserted into the bulb. Thus, even when liquefied mercury is present in the discharge chamber, it receives a large amount of heat from the filament applied voltage and is easily and quickly evaporated, whereby the characteristics of the lamp become stable quickly after turning on the lamp.

REFERENCES:
patent: 4866341 (1989-09-01), Ichiga et al.
patent: 5176558 (1993-01-01), Newell
patent: 5432403 (1995-07-01), Shaffer

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