Screw-based incandescent lamp type fluorescent lamp
US4363083A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1980 |
| Grant date | Dec 7, 1982 |
| Priority date | — |
| Expiry date | Sep 2, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2103/37
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A screw-based incandescent lamp type fluorescent lamp comprises a luminous tube bent to define a vacant space therein, a ballast for said luminous tube disposed in said vacant space, a holder having an opening facing said ballast at a given distance therefrom and holding said luminous tube and ballast, a basal body supporting said holder, in which upper ventilation slits are formed, and a light transmitting bottomed envelope attached to said basal body to form an outer tube and having a lower ventilation opening with an opening area smaller than the total area of said upper ventilation holes, whereby air introduced from said lower ventilation opening into said bottomed envelope will flow along the outer peripheral surfaces of said ballast and said luminous tube and be discharged from said upper ventilation slits to the outside via the opening of said holder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.