Timepiece for displaying both time and orientation of the timepiece relative to the terrestrial magnetic field
US4482255A · kind A · utility
24Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1982 |
| Grant date | Nov 13, 1984 |
| Priority date | — |
| Expiry date | Oct 27, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G21/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A timepiece is provided which in addition to indicating information concerning the time and the date furnishes information relating to the direction and sense of the terrestrial magnetic field. The display is provided with an arrow which may be permanent or displayed at the will of the user and which indicates in which sense the display must be turned in order to align a fixed axis with the direction of the terrestrial field. An azimuth indication may appear giving the angle between the direction north and the route followed. A built in static detector picks up indications of the magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.