Method of locating a light at the focal point of a concave mirror of a signal lamp unit
US4118126A · kind A · utility
1Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1977 |
| Grant date | Oct 3, 1978 |
| Priority date | — |
| Expiry date | Feb 22, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V19/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of locating the filament of a light bulb at the focal point of a parabolic reflector comprising the steps of placing an optical instrument into the electrical socket for the light bulb, positioning the electrical socket and optical instrument until a reticle of the optical instrument is situated at the focal point of the parabolic reflector, and replacing the optical instrument by a light bulb.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.