Magnetic compass card
US11788839B2 · kind B2 · utility
0Cited by
12References
11Claims
0Family size
Inventor
Key dates
| Filing date | Jul 8, 2020 |
| Grant date | Oct 17, 2023 |
| Priority date | — |
| Expiry date | Jul 8, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C17/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The balancing righting moments and dampening of the compass card and directive magnets in a liquid damped magnetic compass are separated to reduce the tilt and oscillation of the compass card when subjected to lateral acceleration, such as pitching and rolling in a seaway. The compass card is connected to the pivoted directive magnetic assembly by a card gimbal arrangement. The compass card is connected to the outer side of the gimbal ring rotating on a first axis. The magnetic assembly is connected to the inner side of the gimbal ring for rotation along a second axis oriented 90 degrees from the first axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.