Compact type fluorescent lamp device having crooked arc path
US5252890A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 1992 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Aug 10, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/307
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Opposite ends of the bent arc bulb of a compact type fluorescent lamp having a relatively long crooked arc path are loosely supported by the base through holes, respectively. Each hole has an outer distance formed between the outer side surface of the end portion of the arc bulb and the edge of the hole greater than the inner distance defined between the inner side surface of the end portion of the arc bulb and the edge of the hole when the lamp is not operated. Each outer distance allows the outward movement of the corresponding end portions of the arc bulb over a variable moving distance under the influence of heat when the lamp is operated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.