R lamp having an improved neck section for increasing the useful light output
US4536834A · kind A · utility
11Cited by
7References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1984 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | May 22, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K1/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A reflector (R) having an improved neck section that increases the useful light output of the lamp is disclosed. The reflector lamp comprises a concave reflector having a primary reflective surface with a parabolic shape, one or more intermediate reflective surfaces with a parabolic shape substantially confocal with the primary reflective surface, and an improved neck section comprising a reducing section, a first substantially straight cylindrical section, an expanding section and a second substantially straight cylindrical section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.