Method of making electric lamp with internal conductive reflector
US4702717A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1987 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Jan 30, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K3/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of making a dual envelope lamp wherein a first envelope is formed having opposite sealed ends with conductive wires projecting therefrom. A formed reflector is welded at one end thereof to one wire and wrapped about the first envelope's opposite sealed end. Conductors are connected (welded) to the other wire and the opposite end of the reflector, respectively. This reflector, first envelope and conductor assembly is then slidably inserted within the open end of a piece of quartz tubing and a press sealed formed about the conductors. Subsequently, the tubing is flushed (e.g., with argon) and filled with an inert gas at a fixed pressure, followed by a tipping operation in which the opposite end of the tubing is sealed to thus define the second (outer) envelope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.