Method of manufacturing incandescent lamps with halogen, particu

Details Method of manufacturing incandescent lamps with halogen, particu Method of manufacturing incandescent lamps with halogen, particu

1990-04-06

1992-04-28

Razavi, Michael

Electric lamp and discharge devices

With gas or vapor

Having a particular total or partial pressure

313579, 313635, 313637, 445 57, H01K 150

Patent

active

051091828

ABSTRACT:
In a method of manufacturing incandescent lamps with halogen, particularly fluorine filling comprising the steps of preparing a body of an incandescent lamp, the body consisting of an envelope made of a translucent material, an incandescent filament arranged within the envelope on supporting means, current lead-in members and a sucking pipe communicating with the inner space of the envelope, evacuating the inner space to a pressure from about 4 Pa to about 5 Pa by the means of a pumping system connected with the sucking pipe, introducing into the inner space a filling comprising an inert gas and a halogen element, ensuring thereby inner pressure about 10.sup.5 Pa within the envelope, closing the sucking pipe for separating the body from the pumping system, and carrying out the evacuating process with a stop at an intermediate pressure, heating up the body to a temperature in the range from about 500.degree. C. to about 600.degree. C. and then continuing the evacuating process. In the incandescent lamp of the invention the inner space of the envelope comprises carbon essentially in the amount ensured by an organic compound added to the filling for introducing the required amount of the halogen element.

REFERENCES:
patent: 3901573 (1975-08-01), Dolenga et al.
patent: 4005324 (1977-01-01), Dolenga et al.
patent: 4090101 (1978-05-01), Rees et al.
patent: 4256988 (1981-03-01), Coaton et al.
patent: 4578043 (1986-03-01), Teshima et al.
patent: 4647821 (1987-03-01), Lapatovich et al.
patent: 4659318 (1987-04-01), Bunk et al.
patent: 4743802 (1988-05-01), Connor et al.

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