Artificial horizon device
US4397555A · kind A · utility
22Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1980 |
| Grant date | Aug 9, 1983 |
| Priority date | — |
| Expiry date | Dec 1, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C15/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention provides an artificial horizon device having a light source of limited power which can be positioned remotely from the aircraft cockpit. A scanning mechanism is mounted in the cockpit to receive light from the light source and to project a light bar representing the true horizon by scanning a projected light beam along the perceived bar at a frequency sufficiently high that the bar is perceived as a continuous projection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.