Visual landing aids for aircraft
US4430695A · kind A · utility
12Cited by
2References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1981 |
| Grant date | Feb 7, 1984 |
| Priority date | — |
| Expiry date | Mar 10, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2111/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Apparatus for aligning an aircraft landing aid projector of the type which comprises a light source located at the focus of a parabolic reflector, a lens mounted coaxially with the parabolic reflector and a filter disposed intermediate the reflector and lens close to the focal point of the lens. The apparatus comprises a base having a surface portion for supporting a projector, a lens for focussing light from the projector onto an image receiving means and means allowing observation of the image receiving means. The filter of a projector is correctly positioned when it appears in focus on the image receiving means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.