SU1765856A1 - High-pressure gas-discharge tube - Google Patents

Abstract

Use: in the manufacture of high pressure gas discharge lamps. The essence of the invention: the flask is filled with metal vapors, metal halides, inert gas. The main and auxiliary electrodes are located at opposite ends of the bulb. The upper edge of the foil of the input of the main electrode is located below the upper edge of the foil of the input of the auxiliary electrode not less than 2 mm. The line of conjugation of the stem with the flask is inclined towards the main electrode. 1 il.

Description

The invention relates to the electrical industry and may be widely used in the manufacture of high pressure gas discharge lamps.

The purpose of the present invention is to increase the reliability of operation and the duration of the combustion of high-pressure discharge lamps,

The invention is illustrated in the drawing.

In the quartz flask 1, filled with metal vapors, metal halides and an inert gas, the main 2 and auxiliary 3 electrodes are sealed at opposite ends with the help of foil bushings 4 and 5 in the legs.

The inner surfaces of the legs are made with a slope B of the main 2 electrode, and the edges of the foil inputs 4 and 5 of the main 2 and auxiliary 3 electrodes facing the discharge are spaced apart from each other, providing a temperature difference preventing condensation of metal halides at the foil input of the auxiliary 3 electrode.

In the stamped area of the auxiliary 3 electrodes, in the area of their welding with foil, monolayer and multilayer spirals 6 are coated with transition glass with an intermediate coefficient of thermal expansion between tungsten and quartz glass.

When the lamp is switched on between the main 2 and auxiliary 3 electrodes, glow discharges occur, leading to a decrease in the ignition voltage and ultimately to the ignition of the lamp.

Condensation of metal halides takes place at the base of the main 2 electrode due to its colder portion, since The input of the main 2 electrode is below the input of the auxiliary 3 electrode and is located at a further distance from the discharge.

. The interface of the stem with the bulb, made with a bias towards the main 2 electrode, leads to the accumulation of metal halides and mercury vapors at the base of the main 2 electrode under the influence of separation and gravitational force t w

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This eliminates the possibility of shunting the ground 2 and auxiliary 3 electrodes with condensed metal, which increases the reliability of the lamps.

The coil 6 is covered with a transition glass, which melts during the manufacture of the lamp and gives good adhesion to the metal and glass, which prevents the passage of positive ions to the foil input of the auxiliary 3 electrodes, thus eliminating the possibility of lamp legs collapsing (the duration of lamp burning increases).

Performing the inner surfaces of the legs with a slope towards the main electrode, as well as turning to the discharge of the edges of the foil inputs of the main and auxiliary electrodes spaced apart from each other by the difference in temperature, increases the reliability of operation and the duration of burning of high-pressure 1-discharge lamps.

Claims (1)

Invention Formula The gas discharge is a high-pressure lamp containing a quartz flask filled with metal vapors, metal halides and an inert gas, at opposite ends of which Foil bushings in the legs are hermetically mounted with main and auxiliary electrodes, characterized in that, in order to increase the reliability and duration of burning, the inner surfaces of the legs are inclined towards the main electrode, and the edges of the foil bushings of the main and auxiliary electrodes facing the discharge are located from one another to a distance providing temperature difference preventing condensation of metal halides at the foil input of the auxiliary electrode.