JPS60124345A - Tight low pressure discharge lamp - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a curved discharge tube made of glass, constructed from a number of parts, two parts hermetically sealed at both ends of the discharge vessel.
The present invention relates to an intimate low-pressure discharge lamp having two electrodes, a filling of mercury and at least one noble gas, and a phosphor coating of the inner wall of the discharge vessel.

In this case, the sealed end of the discharge vessel can be freed from a cap that is cut out on one side, which cap allows the lamp to be mounted in a suitable lighting fixture.

Prior art From the description of DE 30 11 382 A1 and US Pat. Low-pressure mercury vapor discharge lamps are known in which a straight tubular part is formed into a discharge vessel by means of a joint that engages transversely with respect to each straight tubular part. in this case.

This joint runs a fixed distance from each end of the tubular section in order to obtain the cold position required to regulate the mercury vapor pressure (DE-A-301).
No. 1382).

With such straight tube sections, a practically curved discharge vessel can be obtained by juxtaposing all the tube sections and connecting them by means of joints. However, for manufacturing purposes, a large number of joints (precisely less than a straight tube section) can be sealed together with a tube section. In the case of sealing 1 individual straight tube section.

It must be placed with great precision so as to be able to handle the dimensional accuracy required for the installation of the next cap, leaving the aesthetic impression completely out of the question. Furthermore.

A cold spot at the end of the tube will produce a dark partial sound when the lamp discharges, and this dark part will cause problems.

In West German Patent Publication No. 3044058.

Bent discharge tubes have been proposed that are obtained by several U-shaped bends with a large radius. For wide bends, the application of fluorophore can be carried out on the AiI during the bending process. However, forming a tube coated with ILi%iJ in this manner requires special bending techniques and is extremely difficult. That's also true.

This is because the phosphor coating will not last long if it continues to have no cracks or protrusions.

German Patent Application No. 31 12 878 contains a total adjustment of mercury vapor pressure with a discharge tube having one or more narrow bends in one body, in which case the diameter of the discharge tube is equal to the central part of the straight tube section. (8) With such a shape, the cold spots required to fully adjust the optimum mercury vapor pressure can be formed without producing dark areas. .Thus narrow/(branch)■,
147. The tatami mat cover and kf bridge can only be done after the bending process.

This does not present any difficulties in practice in the case of single-bend discharge vessels, but in the case of several-bend discharge vessels it is very complex and expensive to construct.

Problems to be Solved by the Invention The purpose of the present invention is to obtain a close-fitting low-pressure discharge lamp;
The curved discharge tube of this low-pressure discharge light.

It can be obtained by combining individual, easily completed parts. This manufacturing method and the reverse method should be as simple and inexpensive as possible.

At the same time, it is possible to achieve great dimensional accuracy of the discharge tube.

Means for Solving the Problems According to the invention, all parts 2, 3 are 2.
It consists of a U-shaped curved tube shouldering two longitudinal tube sections and a transverse tube section 4.5 running approximately perpendicular thereto, the free ends of the longitudinal tube sections being sealed and separating the individual parts 2. 3 is arranged in such a way that the two longitudinal tube sections run parallel to each other and the closed tube ends are all oriented in the same direction, and the adjacent sections 2.3 are each 2.
It is characterized in that the two longitudinal tube sections are connected to each other in such a way that a single connected discharge channel is formed by means of transverse seals 13 forming holes 12 adjacent to the closed ends.

The discharge tube has already been bent first. By constructing it from coated parts, a significant simplification of the manufacturing process is achieved. The number of horizontal sealing parts. When manufactured from straight tubes (e.g.
(described in DE 30 11 382).1 Furthermore, the mounting of the cap is simplified due to the greater dimensional precision in manufacturing the discharge tube. As already described in DE 31 12 878 A1, the U-shaped bend is completed by a transverse tube section which runs approximately perpendicular to the longitudinal tube section, thereby occupying all the "cold spots" at the tube bend. It has a larger diameter. Since no other cold location is required on the discharge tube, the transverse seal can be mounted significantly adjacent to the sealed end of the longitudinal tube section, so that this seal can optionally be Can be covered with gold sleeve.

The manufacturing method can be further simplified by sealing the longitudinal tube sections of all parts with stems instead of seals.

Due to the above-described structure, different shapes of the discharge vessel can be obtained by different arrangement of the parts.

In one preferred embodiment of the electric lamp, the discharge vessel consists of two parts, which are connected with a lateral seal. in this case,
The longitudinal tube section of the two parts is.

The planes which lie in planes running parallel to one another in each case, and which cover the longitudinal tube section, form a cylinder with an approximately square cross section. This electrolyte possesses especially very tight dimensions as well as a high luminous efficiency.

The discharge vessel can also be constructed from more than two parts, the longitudinal tube sections of the various parts each lying in a plane running parallel to one another.

In this case, the parts need not form any common rows, but can also be arranged offset from each other.

On the other hand, in the case of an electrolytic construction which corresponds to the idea of the invention, the discharge vessel is constructed from a number of parts, the longitudinal tube sections of all the parts lying in one plane. In this way, a flat, compact electrolyte is obtained.

Other discharge vessel shapes different from those described above can be obtained by arranging the sections in a ring. In this case, this part is arranged in such a way that the surface surrounding the longitudinal tube section forms a cylinder with a polygonal cross section.

Example Next, the present invention will be explained in detail with reference to the drawings.

1 to 3 show one preferred embodiment of a discharge vessel 1 for a compact low-pressure discharge lamp according to the invention.

The discharge vessel 1 essentially consists of two parts 2.3, these parts.

It consists of a U-shaped curved glass tube with an outer diameter of 12+II+II and has two parallel longitudinal tube sections each running 105 mm in length with a distance of 3 wn from each other. Element>,
The corners of the U-bends 3 are blow-moulded, so that the transverse tube section 4.5 runs approximately perpendicular to the longitudinal tube section. The portion 2.3 has a stem 6.7 at each end,
8.9, the respective stem 7.9 of all parts 2.3 enclosing the electrode holder 10°11.

The two parts 2, 3 are in a row, in a plane in which the two longitudinal tube sections of the different parts 2.3 each run parallel to each other and the electrode holder 10. The stems 7.9 surrounding ll' are arranged one after the other so that they are on the same side. Two parts 2.3 @ two stems 6.8 without electrode holder
By means of abutting lateral seals 13 forming holes 12, they are connected to each other in such a way that the associated discharge channels are simply formed. The tight low-pressure discharge lamp can have a screw-on or snap-on fitting, the raised edge of which at the same time covers the transverse seal ring ki13.

When operated with a front choke with a CO5ψ of 0.34, the above lamp has a lamp voltage of 97v.

850 at 150mA lamp current and 11.5W input
Emits a luminous flux of 1m.

In the case of the embodiment shown in FIG. 4, three of the discharge tubes 17
Similarly, the two parts 14, 15 and 16.

The two longitudinal tube sections of the different parts 14, 15, 16 are each arranged in a plane running parallel to each other. In this case, however, the sections 14, 15, 16 do not form a single column line at all, but are each laterally displaced from one another and are connected to a single discharge channel by a transverse seal 18.19.

FIG. 5 shows another embodiment of the electrolysis according to the invention. The discharge tube 20 similarly has three parts 21, 2
2.23, these sections are arranged side by side and the longitudinal tube sections of all sections 21.22.degree. 23 lie in one plane. Portions 21, 22, 23 are lateral sealing parts 24, 25
As a result, a single-coupled, flat-shaped discharge path is formed.

It is also possible to give the discharge vessel a number of ring-like shapes by corresponding arrangement of the parts. FIG. 6 shows a discharge vessel 26 for a close-fitting low-pressure discharge lamp, in which the sections 27, 28, 29 have a cross section in which the plane in which the longitudinal tube sections of all sections 27, 28, 29 lie. In the figure, they are arranged on the same side to form a triangle. In this case also part 27.2
8.29 is connected to a single-connecting discharge path by a lateral seal 30.31.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of one preferred embodiment of a baseless compact low-pressure discharge lamp; FIG. FIG. 3 is a side view showing the electrofusion according to FIG. 1, FIG. 3 is a plan view showing the electrolysis according to FIG. 1, and FIG. FIG. 5 is a plan view showing a low-pressure discharge lamp without a cap, and FIG. Such that the surface surrounding the tube section forms a cylinder with a polygonal cross section! [
FIG. 3 is a plan view showing a low-use discharge melt without a cap with a 5-minute ring arrangement; 1.17,20.26...Discharge tube, 2,3,14゜1
5.16, 21, 22, 23, 27, 28°29...part, 4,5...horizontal pipe section, 6,7.8+9...stem, 12...Jl,, 13... side seal ringtone agent
Patent attorney Toshio Yano (and 1 other person) FIG, 4 FIG, 6 Continued from page 1 @ Inventor Ernst Panofs Toykki Augsburg-Waxenstein (Federal Republic of Germany)
Larse 70be

Claims (1)

Claims: 1. A curved discharge tube (1) made of glass, consisting of multiple parts, two electrodes hermetically sealed at both ends of the discharge tube (1), mercury and at least one In a close-fitting low-pressure discharge lamp with a filling from a noble gas and a phosphor coating on the inner wall of the discharge vessel (1), all parts (2, 3) run approximately perpendicular to and to the two longitudinal tube sections. It is a U-shaped curved tube with a transverse tube section (4, 5), the free end of this longitudinal tube section being sealed 1
The individual sections (2, 3) are arranged in such a way that the longitudinal tube sections run parallel to each other and the closed tube ends all point in the same direction, and the adjacent sections (2, 3) 3)
each adjoin the sealed ends of the two longitudinal tube sections. It is characterized in that the transverse sealing parts (13) forming the holes (12) interconnect each other so as to form a single coupled discharge path. Close low pressure discharge light. 2. The ends of the longitudinal tube sections of all parts (2, 3) are sealed by stems (6, 7, 8, 9). A compact low-pressure discharge lamp according to claim 1. 3 Part (21, 22, 23) with many discharge tubes (20)
Karana9. 2. The compact low-pressure discharge lamp according to claim 1, wherein the longitudinal tube sections of all parts (21, 22, 23) lie in one plane. 4 The discharge tube (1; 17) consists of a number of parts (2, 3; 14° 15.16), with different parts (2° 3; 1
The two longitudinal tube sections of 4, 15 and 16) each lie in a plane running parallel to each other. A compact low-pressure discharge lamp according to claim 1. 5 The discharge tube (1) consists of two parts (2, 3). This part is combined with the horizontal sealing part (13). 5. A compact low-pressure discharge lamp as claimed in claim 1 or claim 4, in which the curved surface of the longitudinal tube section forms a cylindrical body with a generally square cross-section. 6 Part (27, 28, 29) with many discharge tubes (26)
2. A compact low-pressure discharge lamp according to claim 1, characterized in that it is a cylindrical body whose parts are arranged in the form of a ring and whose surface covering the longitudinal tube section has a polygonal cross-section.