Illumination cover for fluorescent lamp
US5274536A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 1992 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | May 27, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q3/43
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fluorescent lamp cover molded as a unitary hollow structure made of light-transparent synthetic acrylic resin having an opening for receiving the fluorescent lamp in the interior of the cover. A prismatic diffuser plate of the lamp cover has an interior flat major side surface and on an opposite side surface of the plate an exterior major side surface having a pattern of adjacent pyramidal projections having flat sides through which the illumination light energy from the fluorescent lamp incident on the interior flat major side surface passes outwardly of the cover. The pyramidal projections are of two types and each have an apex which defines the outermost exterior point of the corresponding pyramidal projection. The prismatic diffuser plate interior flat major side surface is spaced a selected distance from the fluorescent lamp within in the interior of the cover so that the exterior major side surface pattern of pyramidal projections diffuses the light energy passing therethrough and effectively renders the configuration of the fluorescent lamp indistinguishable when the lamp is on and the cover prismatic diffuser plate is viewed from the exterior. This relationship causes the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.