Discharge lamp having convoluted discharge path
US4475058A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1981 |
| Grant date | Oct 2, 1984 |
| Priority date | — |
| Expiry date | Nov 10, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A discharge lamp having a discharge path-defining member which so defines the discharge path in the bulb that it runs in a convoluted manner with interlinked passages running between the top and the bottom of the bulb, wherein the top portion of the discharge path-defining member is provided with a top plate which permits one of the curved passage-interlinking portions at the bulb top to pass along the upper surface thereof, such that the shadow of the discharge path-defining member is eliminated from the bulb top and that the shape of the bulb can be freely selected, also enabling the lamp to be designed such that it is not easily broken, the discharge path-defining member can be easily and intimately fitted, and that the output of light is not reduced in the bulb top region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.