Universal lens mounting for selective spotlight beam spread
US4187534A · kind A · utility
13Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1978 |
| Grant date | Feb 5, 1980 |
| Priority date | — |
| Expiry date | Nov 8, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/406
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lens casting or housing provides a series of grooves for selective mounting of various lenses to achieve various beam spreads. By spacing lenses in the housing, it is possible to reduce the diameter and thickness of the lens nearer the light source with consequent improvement in thermal characteristics as well as efficiency in light transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.