Method of making high pressure tungsten halogen lamps
US4509928A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1983 |
| Grant date | Apr 9, 1985 |
| Priority date | — |
| Expiry date | Mar 30, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K3/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of making a high pressure, tungsten halogen lamp wherein a predetermined quantity of a gas mixture including an inert gas (e.g., argon) and halogen compound (e.g., methyliodide) are introduced into the retained tubular member which eventually comprises the sealed envelope of the lamp. This gas mixture is then cooled sufficiently to form either a pool of liquified gas or, alternatively, a frozen, solidified member. A quantity of nitrogen gas established at a predetermined atmospheric pressure is then introduced into the tubular member through the remaining open end while a press sealing operation is accomplished to seal the end. The result is a finished lamp possessing an elevated internal pressure (e.g., three atmospheres) of the described inert gas, halogen and hydrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.