JPS63110545A - Discharge lamp - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a tube made of a transparent or semi-transparent material, each of which is sealed at both ends by a closing member, and a tube with electrode rods oriented toward the respective electrodes inside the tube so as to form a discharge space. and a lead-in conductor fixed to the respective electrode rod by mechanical deformation for supplying current to said electrode, the at least one lead-in conductor for containing a liquid phase-filled compound. and at least one capillary tube connecting the discharge space and the interior of the hollow space to ensure a transport path for the filling compound when in the vapor phase, in particular not exceeding 400 W. This relates to output discharge lamps. The structure of the present invention relates primarily to high pressure sodium vapor lamps.

Oshi's L Han West German Patent Publication No. 2754001 describes a discharge lamp,
For more details, see polycrystalline alumina (p.

A discharge vessel made of a ceramic material based on 1icrystalline alusina is disclosed. The tubular container is also sealed with a polycrystalline alumina closure. The closure member is perforated;
The hole carries a lead-in conductor made of a metal with approximately the same temperature coefficient of expansion as alumina. In particular, the niobium lead-in conductor is connected to the electrodes of the discharge vessel, at least one of which has an exhaust pipe. A seal connects the parts to each other, and the seal ensures a hermetic closure. The discharge vessel contains a filling composition of sodium and mercury and a starting gas containing a novel gas, the lead-in conductor is fastened by mechanical means to the electrode rod, and the electrode rod is placed in the exhaust pipe lead-in conductor across the closure member. It has a long section. The lead-in conductor is the part of the electrode rod that is outside the discharge tube. The joint is mechanically malleable (flatten).
ing).

During the manufacture of discharge tubes, the lead-in conductor is connected to the discharge tube (pumping
pipe) and as a tube for introducing the filling compound into the interior of the discharge vessel. After the manufacturing process inside the discharge vessel has ended, the lead-in conductor is closed off in a hermetically sealed manner as far as possible from the discharge vessel. This closure is also achieved by mechanical malleability. Therefore, the lead-in conductor should be stretched at both ends (
The inner space, i.e. the inside of the lead-in conductor, is closed (flattentng) and is used for storing the liquid filling compound.

The capillary tube realized in the elongated part of the electrode rod provides a communication path of the tube between the discharge space inside the tube and the gas reservoir (inside the lead-in conductor), and the vapor phase filling compound is introduced into the discharge space. can be done.

In this method, the extended section required to secure the electrode rod and realized outside the discharge tube results in an increase in the length of the exhaust pipe or lead-in conductor, which is much larger than necessary. There are drawbacks.

Long lead-in conductors cost more than short lead-in conductors, and this can be better understood if one takes into account that the lead-in conductors are made of niobium. The so-called cooling point of the tubes relative to one another is that in an arrangement of the type shown above, it is very far from the discharge heat source, ie the discharge arc and the electrodes. Special measures must therefore be taken to ensure the required temperature at this cooling point, which is particularly problematic in the case of discharge tubes with a power not exceeding 400 W. The practical solutions to date have mostly been to use special heat-reflecting surfaces at both ends of the discharge tube, resulting in high manufacturing costs, and to carry the surface of the tube wall and the heat-reflecting surface made of ceramic material. This will create thermal contact between the parts. Thermal contact is caused by a high spread of discharge tube parameters (
High 5pread). Another possibility is heating the interior of the discharge vessel, which is expensive.

The object of the present invention is to provide a power source that does not exceed 400W, especially 150W.
The interior of the discharge tube can be evacuated through the exhaust pipe-type lead-in conductor without the need to use special means for the discharge tube with a power output of The object of the present invention is to produce a discharge lamp in which the lamps are advantageously arranged.

The invention is based on the recognition that the mechanical connection between the electrode rod and the lead-in conductor should be realized inside the discharge vessel rather than outside it. This method is used because it is very simple to secure the required temperature at the cooling point.

2) The present invention simplifies the manufacturing process of discharge lamps and ensures the required cold temperature of discharge lamps without any special measures. a tube made of material, electrodes arranged opposite each other on respective electrode rods inside said tube to form a discharge space, and fixed to the respective electrode rods by mechanical deformation to supply current to said electrodes; A discharge lamp is proposed, in particular with a power not exceeding 400 W, having a gap, at least one of the lead-in conductors, containing a space portion for accommodating a liquid-phase filling composition and a vapor-phase filling compound. at least one capillary tube connecting the discharge space and the interior of the hollow space to ensure a transport path for the filling compound when the lead-in conductor is connected to the electrode. It is concluded by treating the rod with urine.

In an advantageous embodiment of the proposed discharge lamp, the lead-in conductor has a four-leaf clover-shaped cross section in the elongated section.

In a further advantageous embodiment of the proposed discharge lamp, the lead-in conductor is fastened to the electrode rod by mechanical malleability and spot pressure welding.

The discharge lamp of the invention can be manufactured without any special modifications to the technical process and has the required cooling point without special measures on the basis of the proposed lead-in conductor. , which is economical and reliable in manufacture and makes it possible to realize high-pressure discharge lamps of higher and lower power. It can be fixed to the container with a type screw.

chiasm spots The details of the present invention will be explained based on embodiments shown in the drawings.

The discharge according to the invention, in FIG. 1, has a discharge vessel l made of polycrystalline alumina, the end of which is closed by a closure member 2 made of alumina-based ceramic material. The closing member 2 ensures a hermetically sealed closure of the discharge vessel 1 by means of a sealing member 3 constructed of oxidized metal according to known principles. The same sealing element 3 is used to secure the lead-in conductor 4 in the closure element 2. The lead-in conductor 4 consists of an exhaust pipe-type member, usually made of niobium. The thin metal tube of the lead-in conductor 4 has an end 5 lying outside the discharge vessel 1 and projects from the closure member 2 . End 5
allows the evacuation and filling process of the discharge tube 1, which after completing this process is mechanically stretched (flattened).
ning). Lead-in conductor 4
has a further end 6 inside the discharge lamp, which further end 6 is connected to the electrode 7 by an electrode rod 8 supporting the electrode 7. The electrode rod 8 is connected to the lead-in conductor 4 by a flattened section 10 treated by mechanical deformation of the lead-in conductor 4 . According to the embodiment shown in FIG. 1, the stretched (crimped) part 10 can be treated with a four-joy brace device, which means that the cross-section of the stretched part 10 of the lead-in conductor is as shown in FIG. It is shaped like a four-leaf clover. A portion 10 elongated by processing the lead-in conductor 4 to make it malleable is used in this discharge lamp and is introduced into a portion defined by the stretched portion 10 of the lead-in conductor 4 and the end portion 5 on the outside of the discharge tube 1. A capillary tube 9 is provided with an inner diameter that prevents the flow of liquid filling compound. However, the capillary tube 9 ensures a path for the vapor phase part of the filling compound to communicate between the interior of the discharge vessel 1, more precisely the discharge space formed by the electrode 7, and the interior of the lead-in conductor 4. Should.

The manufacturing process for discharge vessels and discharge lamps is known in all further details from the literature and from practice. However, in the known method, the extending portion 10 connecting the electrode rod 8 and the lead-in conductor 4 is located outside the discharge tube, whereas in the case of the present invention, it is located inside the discharge tube 1, and the cooling point ( cold po
int), or in other words, the gas reservoir (res) of a discharge lamp.
ervoir) also reaches the interior of the discharge vessel 1, where its temperature can be increased without special heating power.

The advantage of this method is that the output does not exceed 400W, especially 50~
Approved for discharge lamps with an output within the range of 250W.

The device used for malleableizing the lead-in conductor 4 to the electrode rod 8 is preferably a point pressure welder.
ure welding), in which case a very reliable electrical contact between the connected means can be ensured. It has a cohesive contact on mechanically stretching.
ct).

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a part of the discharge lamp of the present invention provided with a novel lead-in conductor, and FIG. 1... Tube 2... Closing member 4... Lead-in conductor 7... Electrode 8... Scratched 9... Capillary tube 10... Extended portion

Claims (3)

[Claims] (1) A tube made of a transparent or translucent material whose both ends are each sealed by a closing member, and an electrode disposed inside the tube facing each electrode rod so as to form a discharge space;
a lead-in conductor fixed to the respective electrode rod by mechanical deformation and for supplying electric current to said electrode, at least one lead-in conductor comprising a space portion for accommodating a liquid phase filling composition and a vapor phase filling compound; In a discharge lamp having at least one capillary tube connecting the discharge space and the interior of the hollow space to ensure a transport path for the filling compound when the recess is A discharge lamp characterized in that a portion of the conductor (4) located inside the tube (1) is fastened to the electrode rod (8) by subjecting it to malleable treatment. (2) The discharge lamp according to claim 1, wherein the elongated portion (10) of the lead-in conductor (4) is formed in a four-leaf clover-shaped cross section. (3) The lead-in conductor (4) is fastened to the electrode rod (8) by mechanical malleability and point pressure welding, as set forth in claim 1 or 2. discharge lamp.