Device for reading directly from a chart the heading to be followed by an air or sea-going vehicle
US4941264A · kind A · utility
Inventor
Key dates
| Filing date | Feb 28, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Feb 28, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06G1/0052
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A device is provided for directly reading from a chart the heading to be followed by an air or sea-going vehicle, comprising a disk with, at its periphery, a circular coaxial graduation of the "compass card" type movable in rotation with respect to this disk, the latter being itself mounted for rotation about a fixed shaft fast with a support, via a rotary mount with offset adjustable in modulus and orientation. The disk further comprises a rectilinear scale for determining the modulus of the offset, as well as a reference mark for indicating the orientation of this offset on the circular graduation. The scale is graduated in successive values representative of the wind (or current) speed/proper speed of the vehicle ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.