Helmet-mounted sighting system
US4287809A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1979 |
| Grant date | Sep 8, 1981 |
| Priority date | — |
| Expiry date | Aug 20, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2005/027
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic system for determining the orientation including position of a helmet worn by a pilot is disclosed, having a transmitting antenna for transmitting electromagnetic field vectors, a receiving antenna for sensing the electromagnetic field vectors, a control apparatus responsive to the sensed electromagnetic field vectors and the transmitted electromagnetic field vectors for determining the orientation including location of the helmet, the control apparatus having a first output for supplying the orientation to a utilization apparatus and a second output, a driver for supplying driving energy to the transmitting antenna coils, and a selector switch connected to the second output of the control apparatus and to the driver for sequentially energizing the coils of the transmitting antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.