Luminaire motorized shade (douser) mechanism
US6168291A · kind A · utility
9Cited by
13References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1998 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | Sep 14, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/407
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A luminaire motorized shade or douser mechanism includes a lamp mounted within a reflector and a motorized shade unit that opens and closes in front of the lens of the reflector. The shade unit includes a motor, two rollers, two guide cables, a sheet of opaque flexible material or fabric, and an aluminum frame. The motor drives the roller to run the shade in front of the lens to cover it and also to uncover. The motorized shade or douser mechanism is used to effectively block the light emitting from the lamp and create a condition whereas no light leaves the lens of the luminaire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.