High pressure sodium arc discharge lamp with weldless arc tube support member
US5173632A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1991 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Feb 26, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J5/60
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high-pressure sodium arc discharge lamp having a novel arc tube support member which provides a secure mechanical and electrical connection and does not require welding between the support member and the arc tube lead wire or feedthrough. The support member may be adapted for mounting a single arc tube or two arc tubes within the outer envelope. The feedthrough of each arc tube is inserted into an aperture in the support member such that a secure interference fit is achieved. The interference fit is similar to the fastening of a threadless nut. In a preferred embodiment, the support member has a first planar surface having one or more apertures therein and two second planar surfaces substantially perpendicular to the first planar surface; each second planar surface has a protruding leg by which the support member may be mounted on the internal lamp frame. Several alternative designs are disclosed wherein, for example, the aperture may be circular or rectangular, the aperture may or may not have opposing tabs, and the cross section of the arc tube lead wire or feedthrough disposed within the aperture may be circular or rectangular.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.