RU2000628C1 - Three-phase gaseous-discharge lamp - Google Patents

Abstract

Usage: in high pressure discharge lamps. SUMMARY OF THE INVENTION: the lamp contains a tubular bulb with four main electrodes, two of which are located at the ends of the bulb. Two other electrodes with current leads are installed between the extreme ones so that the angle between their projections onto a plane perpendicular to the bulb axis lies in the range 10-350 °. 2 ill.

Description

The invention relates to three-phase high-pressure arc gas discharge lamps, for example, metal halide, mercury, sodium or xenon, the burner of which is used both without an external bulb and with an external bulb coated or not coated with a phosphor.

Known three-phase gas discharge lamp made of optically transparent material, having a straight tube bulb and four main electrodes embedded in it, mounted on one straight line, two of which (extreme) are located at the ends of the tube, and two others (middle) are located between the first two so that the distance between them is divided into three parts.

However, this design of a three-phase lamp is difficult to implement if it is necessary to manufacture a low-power lamp with a small distance between the middle main electrodes, since when heating and welding (soldering) one middle electrode with a current lead, the tube is overheated and the second middle tube must then be inserted into it electrode with current lead.

An object of the invention is the manufacture of a three-phase four-electrode lamp with a small distance between the main middle electrodes.

The goal is achieved by placing the middle main electrodes with current leads in the lamp bulb relative to each other so that the angle between their projections onto a plane perpendicular to the bulb axis lies within 10-350 °.

Figures 1 and 2 show in two projections a lamp with electrodes mounted at an angle of 90 °.

The lamp contains a bulb 1, extreme main electrodes 2, middle main electrodes 3, current leads 4, tubes 5 into which current leads with electrodes are soldered.

With the proposed design of a three-phase discharge lamp, heating the tube 5 and welding one middle current lead 4 with the electrode 3 does not lead to overheating and deformation of the tube 5, into which the other middle current lead 4 is then soldered, or to the deformation of the already embedded middle current lead 4, since the welding time of one of the middle electrodes 3 with the current lead 4 into the tube 5 reflected from the tube flame does not hit / O

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It is connected to the second tube 5, into which the second middle electrode 3 with the current lead 4 will then be welded, and therefore does not deform it. When welding the second middle electrode 3 with the current lead 4 into the tube 5, the flame reflected from the tube 5 will not deform the previously welded first middle electrode 3 with the current lead 4.

In tubes in which one or two main electrodes with current leads are placed, auxiliary electrodes with current leads can also be arranged, which serve to facilitate ignition of the discharge in the lamp.

Claims (1)

SUMMARY OF THE INVENTION A three-phase gas discharge lamp comprising a tube bulb made of optically transparent material and sealed in it on current leads embedded in tubes, four main electrodes, two of which are mounted at the ends of the bulb and two others are placed between them perpendicular to its axis so thus dividing the distance between the extreme main electrodes into three parts, characterized in that the middle electrodes are set so that the angle between their projections onto a plane perpendicular to the axis of the bulb lies within 5 10-350 °. 0 Figure 1 113 4 5 Figure 1