Metal halide lamp assembly
US4961019A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1988 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | Oct 14, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/827
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric lamp includes a lamp assembly mounted in a lamp envelope including a reflector, a lens and a base for connection to an electrical source. The lamp assembly includes an arc tube having a longitudinal axis aligned with the optical axis of the reflector, an arc tube support strap attached to one end of the arc tube and including legs extending laterally in opposite directions from the axis of the arc tube, bulb spacers coupled to the legs of the support strap for positioning the arc tube relative to the lamp envelope, a light-transmissive shroud around the arc tube, and electrode supports coupled to the upper and lower electrode leads of the arc tube. The shroud includes an open end which abuts against the legs of the support strap and a domed end which substantially encloses one end of the arc tube. The electrode supports are electrically isolated from the support strap, the bulb spacers and the reflector. The shroud is secured between the support strap and one of the electrode supports. The domed end of the shroud is preferably located at the lens end of the arc tube, but can also be located at the base end of the arc tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.