Method of assembling an electric lamp having a canted arc tube
US4936807A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1989 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Feb 17, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/265
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention is a method of assembling an electric lamp having a canted arc tube. The invention permits the lamp to be assembled using a standard bulged tube outer envelope having an elongate neck portion of the type normally used for lamps in which the arc tube is mounted coaxially with the envelope axis. In the inventive method, a stem assembly having a pair of rigid conductors extending therefrom is first sealed in the open end of the neck portion in a gas-tight manner. The envelope is severed around its circumference in the region where the neck portion merges into the bulbous portion of the envelope. After the two portions are separated, a frame holding the arc tube is welded to the rigid inductors of the stem assembly with the arc tube positioned at the desired angle with respect to the lamp defined by the elongate neck portion. The two envelope portions are then resealed in a gas-tight manner and a lamp cap secured to the neck portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.