SU1356039A1 - Sealed current lead into quartz envelope of lamp - Google Patents

Abstract

The invention relates to electrical engineering and can be used in the manufacture of high and super high pressure gas discharge lamps. The aim of the invention is to increase the reliability of the current lead and the lamp. A special feature of the design is that the auxiliary electrode is introduced into the volume of the lamp not through the flask, but through its leg, being combined with the cathode assembly. Such a structure provides mechanical strength and reliability of both the current lead and the lamp itself. In the body of the quartz insert 4, a longitudinal groove 13 is made, and in the electrode holder 6 and the terminal B, the grooves 14 and 15 are respectively connected. The auxiliary electrode 9 is connected to the molybdenum foil 11 and the additional terminal 10, the assembled assembly is placed into the quartz tube 12 and is welded. The auxiliary electrode assembly is placed in the slots 13, 14, and 15. A protective foil is mounted on the holder 6 and terminal 8. The entire joint site is placed in the leg of the lamp and brewed. 3 hp f-ly, 5 ill. (L with JV Oi about with

Description

The invention relates to electrical engineering and can be used in the manufacture of high and ultra high pressure gas discharge lamps.

The aim of the invention is to increase the reliability of the current lead and the lamp.

FIG. 1 shows a lamp with the proposed current lead; figure 2 - current lead, longitudinal section; in fig. 3 is a section A-A in FIG. 2; Figures 4 and 5 are variants of current leads.

The lamp (Fig. 1) consists of a quartz bulb 1, into which anode 2 and cathode 3 nodes are welded. The current lead of the cathode assembly consists of a quartz insert 4, crimped on the side surface by an open cylinder of foil 5 connected at one end to the cathode assembly consisting of the holder 6 and the working part 7, and the other with output 8, the auxiliary electrode 9 connected to dopolnitelm output 10 through a flat foil 11. Electrode 9, foil

11 and terminal 10 are placed in a quartz tube 12, located respectively in the groove 13 of the liner 4, the groove 14 of the holder 6 and 15 - the terminal 8.

The auxiliary electrode 9 and the output 10 (Fig. 4) are placed in three sections of a quartz tube, respectively 16, 17 and 18, a quartz tube

12 (FIG. 5) passes through coaxial holes 19 in the ends of the quartz insert 4,

The auxiliary electrode is introduced into the lamp volume through the flask, and through its leg, being combined with one of its electrode assemblies, namely, the cathode one. Such a design increases the mechanical strength and reliability of both the current lead and the lamp itself. In addition, the current lead design allows the auxiliary electrode to be given any shape (ring, square, etc.).

The current lead is manufactured as follows.

In the body of the quartz insert 4. (FIGS. 2 and 3), a longitudinal groove 13 is made in the holder 6 and the terminal 8, respectively the grooves 14 and 15, or the holder 6 and the terminal 8 are ground to a certain depth. Mount the cathode 7 (the working part of the holder 6), the holder 6, the liner 4, the output 8 with the foil 5. Next, mount the auxiliary electrode assembly 9 with the molybdenum foil 11

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and an additional conclusion 10. This node is placed in a quartz tube 12 of small diameter and brewed. After trimming the technological gains and shaping the electrode 9, the auxiliary electrode assembly is placed in the slots of the holder 6, the insert 4 and the terminal 8, which are disposed along the axis when the cathode assembly is mounted. Next, on the holder 6 and the terminal B, a protective foil made of a refractory metal is mounted, preventing the node from falling out at the auxiliary electrode 9 and strictly fixing the location of the third electrode relative to the main electrodes. The entire joint unit is placed .in the leg of the lamp and brew. At the end of the terminal 13 there is a recess which communicates with the longitudinal opening of the terminal. Insert 4 - cylindrical quartz, filled with air.

The auxiliary electrode is assembled in the following order.

The end of the electrode 9 is given a certain shape, and its body is made wavy and a quartz tube 16 is put on it. The output 10 of the auxiliary electrode is made in the following order: a molybdenum or other wire is bent in the shape of a letter G, a quartz tube 17 is put on it, then the wire again bend by 90 °, wavy and a quartz tube 18 is put on it. Quartz tubes are put on to electrically isolate the auxiliary electrode assembly from the main (cathode) one. node in working condition. The waviness of the wire is made so that quartz tubes do not fall off the wire and do not move. . The strip of foil 11 is welded to pin 10 and electrode 9, and the foil:.: Is placed during assembly (assembly) of the joint assembly on the surface of the insert 4. After mounting the assembly, a protective foil is mounted on the holder to fix the electrode 9. Next, the entire assembly is placed in the stem of the lamp and brew.

The current lead version (Fig. 5) is manufactured as follows.

The electrode 9, the strip of foil 11 and the output 10 are placed in a quartz tube 12 and brewed. Next, take a hollow quartz insert 4 (unfilled) and at both ends coaxially make holes 19 of the diameter of the tube 12 as close as possible to the surface of the liner. The holes 19 in the body of the liner 4 are made, for example, by pulling whiskers with a stick with an end surface of the insert when it is heated. A tube 12 with a welded auxiliary unit is inserted into the holes of the liner 4. The bore of the liner 4 and the surface of the tube 12 adjoining thereto are heated by a burner flame, and this part of the tube 12 is gradually deposited on the hole 19 of the liner 4, ensuring the leaktightness of the liner. The same operation is repeated on the opposite end of the insert. The shtengel, through which the liner is pumped out and filled, is soldered to the surface of the liner and, after filling, is sealed off. Its process is pressed into the body of the insert 4 by heating. Conclusion 8. And the holder 6 have grooves on their surface, into which a part of the tube 12 protruding from the liner 4 is placed (during installation, the technological gains are cut and the electrode 9 is given the corresponding shape). Next, mount the cathode assembly. If the protruding 4 parts of the tube 12 do not fit due to their dimensions in the slots of the holder 6 or pin 8, then these parts (quartz) are cut off with a knife and tightly attached (thin) quartz tubes are put on the wire node is repeated. The assembled cathode assembly is placed in the leg of the lamp and brewed in a standard way.

Claims (4)

1. A sealed current lead into a quartz bulb of a lamp containing a quartz cylindrical insert compressed on the side surface with an open foil cylinder connected at one end to a cathode assembly consisting of a holder and a working part, and the other with output and brewed in the bulb stem that differs By the fact that, in order to increase reliability, an auxiliary electrode is installed in the leg along its length, connected to an additional electrode through a flat foil, located parallel to the liner, I and it is equipped with at least one quartz crystal. tube designed for fixation of the auxiliary electrode with respect to the cathode assembly. 2. The current lead according to claim 1, about tl and - due to the fact that the holder of the cathode assembly, insert and vent are each made with a longitudinal groove along the length and in them the indicated tube is installed with the auxiliary electrode placed inside it in length and welded into it by an auxiliary electrode, a foil and a lead. 3. The current lead according to claim 1, characterized in that the holder of the cathode assembly is made with a longitudinal side groove in which a quartz tube is installed with an auxiliary electrode placed inside it ,. the output of the cathode assembly has a longitudinal hole and a transverse groove communicating with it, in which two additional tubes with an auxiliary electrode outlet are installed, the shape of the auxiliary electrode and the outlet in the place of their installation inside the respective tubes are chosen such that they are fixed, and The foil is located on the surface of the insert between the edges of an open cylinder. 4. The current lead according to claim 1, characterized in that the insert is made with coaxial holes at the ends, the holder and the output of the cathode assembly have longitudinal grooves made coaxially with the holes, and a quartz tube is installed in said slots and holes. eight 2 Sri.H 9h 41/4 11 one/ X // L /about 5 Compiled by N.Semenov Editor L.Povkhan Tehred M.Didzh Corrector F.Generator Order 5798/45 Circulation 697 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4