Method to introduce a fill gas mixture into an electric light bulb, particularly halogen incandescent lamp

US4659318A · kind A · utility

Assignee

• Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

• Axel Bunk · Berlin, DE
• Gottfried Eichelbronner · Hersbruck, DE
• Rainer Haake · Berlin, DE
• Karl-Heinz Stadler · Adelschlag, DE
• Manfred Gaugel · Fürstenfeldbruck, DE

Key dates

• Filing date: Nov 25, 1985
• Grant date: Apr 21, 1987
• Expiry date: Nov 25, 2005

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01J9/395
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

To eliminate the necessity for supervising the composition of a fill being ntroduced to a halogen incandescent lamp bulb, so that the proportion of halogen containing additive and inert gas will be at a predetermined ratio, by spectroscropic and other similar means, the halogen containing additive (8) is placed, in solid or liquid phase, in a mixing vessel at a temperature (T.sub.1) which is in excess of a temperature (T.sub.2) which is necessary to result in the vapor pressure to enrich the inert gas at the predetermined quantity. The inert gas is conducted into the vessel and thereby excessively enriched. The excessively enriched inert gas is passed through a condenser, the temperature of which is accurately controlled to the temperature (T.sub.2) to thereby condense out the excess halogen additive, so that the mixture then will have the desired relationship of halogen containing additive and inert gas; this mixture is then being filled into the lamp. If the halogen is present in form of a carbon containing compound, or a hydrocarbon compound, it is conducted first over a cracking unit (15), for example quartz granules heated to 900.degree. C., to remove any carbon. Composite fil…