Illuminating device
US4733332A · kind A · utility
76Cited by
5References
16Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 27, 1986 |
| Grant date | Mar 22, 1988 |
| Priority date | — |
| Expiry date | Mar 27, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D27/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention provides an illuminating device characterized in that the device comprises a light-transmitting rod for transmitting the light incident on one end thereof toward the otehr end, a diffusion pattern formed on the outer peripheral surface of the rod by adhering a fine powder of high refractive index in the shape of a line extending continuously or discretely axially of the rod, and a transparent protective tube covering the peripheral surface of the rod with a circumferential clearance formed between the rod and the tube, the clearance between the rod and the protective tube being sealed off at opposite ends thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.