Projection lamp unit
US4545000A · kind A · utility
45Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1985 |
| Grant date | Oct 1, 1985 |
| Priority date | — |
| Expiry date | Mar 25, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V7/09
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved projection lamp unit including a glass reflector having a concave reflecting surface and a tungsten halogen lamp positioned within the concavity of the reflector. The concave reflecting surface of the reflector is provided with alternately disposed radially extending regions including a series of specular stripes in combination with alternately spaced regions of facets. Preferably four or five stripes and an associated four or five facet regions are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.