SU1224856A1 - Electrode unit of gaseous-discharge lamp - Google Patents

Abstract

This invention relates to gas discharge lamps. Its purpose is to reduce the longitudinal dimensions of the electrode unit of the gas discharge lamp while increasing its power. The electrode assembly contains a holder (D) 1 of the electrode 2, mounted in the leg of the bulb (NK) of the lamp. The D 1 is connected to the outer output of the lamp with the help of foil strips (PF) 6 and wire leads 8, which are welded into the NK. The dimensions are reduced and the power produced by the NK is equipped with a disk protrusion 7 located perpendicular to its axis, in which the PF6 in radial One condom each PF6 is attached to the D 1 along the cylindrical surface forming it. Wire connectors 8 are connected to the other end of each PF 6 along its entire width, which are connected to the lateral surface of the disk part 9 of the external output of the lamp with other ends. Between the outer thrust of the protrusion 7 of the NK and the disk part 9 of the outlet there is a gap for access of the refrigerant to the protrusion of the NK. The holes 12 in the outlet 9 also contribute to this. 2 Il.

Description

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The invention relates to gas discharge lamps and can be used to produce powerful gas discharge sources of optical radiation.

The purpose of the invention is to reduce the longitudinal dimensions of the electrode assembly when turning on the lamp power.

FIG. Figure 1 shows the proposed electrode discharge tube; in fig. 2 - end part of the electrode holder in the process of welding foil strips to it.

The electrode assembly contains; a tungsten holder 1 of the electrode 2 mounted on the end of the holder 1 inside the discharge quartz flask 3 by one of the known methods. The holder 1 in the middle part is crimped by the tubular part 4 of the quartz leg, the length of part 4 is minimal and is determined only by the requirements of a mechanically durable installation of electrode 2. This strength increases when the helical groove in which the wire spiral 5 is made of refractory metal is installed on the part of holder 1. To the other end of the holder 1, to its cylindrical surface, are welded through a tantalum foil gasket to the ends of the molybdenum foil strips 6, which are pounded into the disc protrusion of the legs 7 so that they diverge from the holder 1 along the radii of the protrusion 7 and are in planes , coinciding with the axis of the knot and leg, which ensures reliable visual control of the quality of their welding. Molybdenum wire tokens of water 8 parallel to the axis of the node are welded to the other ends of the strips 6 along their entire width, which ensures both the uniformity of the load of the rod of the strips at the ends and the absence of mechanical stresses after the connection with the load. The current leads 8 protruding from the end of the protrusion 7 legs are welded to the disk part 9 of the lamp output, in the tubular part 10 of which the flexible part 11 of the output from the twisted copper wires is pressed. Between the outer end of the protrusion 7 of the leg and the inner end of part 9 of the outlet there is a gap sufficient for free access of the cooling fluid to the outer end of the protrusion 7, this is facilitated by the presence of holes 12 in part 9 of the outlet. Number of strips 6 equal

0

0

five

but 8-20. Bulb 3 is filled with xenon or mercury vapor with a working pressure higher than atmospheric.

When manufacturing the assembly, strips 6 are made with a length 2 times longer than the calculated length of the sealed spa, etched to the blade (shaped edges of the long sides, are welded to both leads 8 at each end, then each of the strips is successively welded to holder 1 along a transverse line dividing a double dpina into two different parts 6, as shown in

5 of FIG. 2. Due to the flexibility of the thin molybdenum foil from which the strips 6 are made, during welding, the strips are easily moved apart, which simplifies the welding, and after it folds together and deflects, which simplifies the welding of the next pair of strips 6, etc. Therefore, a compact placement of the welding lines on the cylindrical surface of the holder 1 is achieved, and with a relatively small diameter of the holder 1, the number of strips 6 can be significant. After welding a specified number of strip 6, the holder 1 installed by the spiral 5 is pushed into the quartz tube of the leg from the side of its unfolded in the form of a glass part in which the assembly of strips 6 is placed, separated by quartz wedge-shaped inserts. The quartz plate is hermetically welded to the edges of the unfolded part of the burner with a sharp flame, then, when pumping from the side of the tubular part 4, the strips 6 are hermetically sealed with quartz, for which they are fixed with quartz, the COTS-DRIVES 8 are fixed when the softened walls of the welded plate are pulled, and then melted and quartz liners, while the gaps are filled with quartz glass walls, flowing under the pressure of the external atmosphere. The welding of the proposed construction is performed while heating on both sides of the disc protrusion 7, this can result in high quality spa strips 6 with quartz, and the quality of the spa is easily controlled on both sides of the strips when the transparent protrusion 7 is penetrated through. After the formation of the monolithic protrusion 7 by heating tube 4 is crimped part of holder 1 with helix 5, setting

five

0

five

50

electrode 2 is poured, the legs are welded to bulb 3, the ends of the current leads 8 are opened and welded to the disk 9, and a structure with sufficient mechanical strength is formed, since the number of current leads 8 is large; however, if necessary, the lead may additionally be attached to the leg by one of the known methods. When the lamp is in operation, the foot can be cooled with high efficiency, since all its metal parts are separated from the cooled surfaces by only a small layer of quartz. The absence of the possibility of overheating of the hermetic current leads to the operational reliability of the lamp.

Claims (1)

Invention Formula The electrode unit of the gas discharge lamp, which contains metal foil pans sealed into a quartz foot, connected at one end by means of wire leads with an outer terminal and at the other end with a coaxial cylindrical holder of the lamp electrode, different in that longitudinal dimensions with increasing lamp power, the leg is provided with a disc protrusion perpendicular to its axis, in which the foil strips are placed in radial planes passing through the axis They are attached to the holder along the cylindrical surface that forms it, the wire leads are attached to the strips across their entire width, the outer terminal has a disc part located with a gap in relation to the disc protrusion and 2Q is provided with through holes and the current leads are attached to the lateral surface of the disk parts. Compiled by V. Gorchakova Editor O. Kolesnikova Tehred I. Popovich Corrector M. Pojo Order 1956/51 Circulation 643Subscription , VNIIPI USSR State Committee for inventions and discoveries P3035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 FIG. 2