JPS59128732A - Manufacture of halogen lamp - Google Patents

Abstract

PURPOSE:To massproduce halogen lamps having good efficiency by a method wherein a cylindrical bulb having a filament projected from both ends is connected with lead-in wires fixed by sealing beads while being set on a carbon jig and covered by an outer cylindrical bulb further being heated and sealed in a vacuum box. CONSTITUTION:Beads 5'' are made on both ends of a tungsten filament 3 with the glass having an expansion coefficient according with tungsten withstanding high temperature while being set under a jig A together with a cylindrical bulb made of the glass same with the beads. After putting this into a pressure sealing box while being vacuumized, halogen gas is led in while being sealed by heating in the pressure sealing box in order to constitute an inner cylindrical bulb 2 having a filament 3 projected on both sides. This is connected with the tip parts of the lead-in wires 4 fixed by a sealing bead 5 while being set on the carbon jig A and covered by an outer cylindrical bulb 1 having a head formed roundly or in the lens shape further heated and sealed inside of a vacuum box in order to obtain a halogen lamp having dual structure and the vacuumized middle.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the manufacture of halogen lamps, and in conventional halogen lamps, it is necessary to raise the temperature of the outer bulb to a high temperature in order to cause the halogen cycle. When using a valve, there was always a problem with the heat from the outer valve and the rise in ambient temperature caused by that heat. Furthermore, if the temperature of the outer bulb is lowered to avoid this, the halogen cycle will not be performed sufficiently, resulting in the inconvenience of significantly shortening the life of the lamp. For this reason, there are many restrictions on the use of halogen lamps due to heat, which limits the places where they can be used, making it particularly difficult to use them in narrow spaces.

Therefore, the present invention maintains the halogen cycle temperature within the inner bulb while blocking thermal conduction to the outer bulb to partially keep the outer bulb at a low temperature. Beads were made from tungsten, which can withstand high temperatures, and glass with a high expansion coefficient, and a cylindrical bulb made from the same glass as the beads was placed on a jig, and the beads were placed in a pressure-sealed box and evacuated. Later, halogen gas was introduced and heat sealed in a pressure sealing box to create a halogen lamp with an inner cylinder bulb with tungsten filaments protruding from both ends. Connect to the
This was placed on a carbon jig, and an outer bulb with a circular or lens-shaped head was placed over it and sealed by heating in a vacuum box (Domestic Patent No. 96!9g1 It is a halogen lamp with a double structure, and a vacuum is created between the inner bulb and the outer bulb, and there is no heat conduction in the outer bulb.

The main feature of this lamp is that it is an efficient halogen lamp that can perform a sufficient halogen cycle without raising the ambient temperature, and it can be installed and used in the same socket as conventional lamps. In addition, this manufacturing method can produce several hundred uniform products at a time, so it is cheaper and suitable for mass production than conventional manufacturing and pickling methods.

[Brief explanation of drawings]

FIG. 1 shows a cross-sectional view of a completed product of a double outer bulb halogen lamp according to the present invention. (1) Outer cylinder valve (:t) Inner cylinder valve made of tungsten that can withstand high temperatures and has an expansion coefficient <3> Tungsten filament (g) Lead-in wire (Dimet wire) (5) Sealing beads (6) Vacuum part (? ) Halogen gas filled part Figure 2 shows an assembly diagram of the internal valve according to the present invention. (,2J,) and beads (-1
) Assembly using a jig (2-f) Tungsten filament attached to beads (2-r) Cylindrical valve made of tungsten that can withstand high temperatures and has an expansion coefficient (2-+) Inside a halogen gas pressurized box in (ll
) and (-1-) ・(2-d) Completion of a halogen lamp that is cylindrical and has an inner cylindrical bulb with part of the filament protruding from both ends of the cylindrical shape (Fig. 3). It is an assembly diagram of the small halogen lamp according to the invention. A (3-S) Beads for sealing the outer cylinder bulb (3-#)
The installation of the outer cylinder valve toy (,?-,?) (Koya) and (3-P) is assembling C3-? ) In the assembly diagram of (3-life) and (3-nod) in a vacuum box, A is a carbon jig and B is a tungsten plate. (5) Figure 3

Claims (1)

[Claims] A small halogen lamp with a cylindrical shape and a part of the filament protruding from both ends of the cylindrical tube as an inner tube bulb is connected to the end of the lead-in wire fixed with a sealing bead, and this is attached to a carbon jig. A method for producing a non-conductive halogen lamp with a double-bulb structure in which the head is heated and sealed in a circular or 1-inch shape so as to be placed on top of the lamp and covered with it.