Magnetic bearing plotting and sighting device
US4081912A · kind A · utility
2Cited by
5References
11Claims
0Family size
Inventor
Key dates
| Filing date | Jun 24, 1977 |
| Grant date | Apr 4, 1978 |
| Priority date | — |
| Expiry date | Jun 24, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C17/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for taking and plotting magnetic bearings which includes an elongated straight edge device having numerical graduated indicia along one edge thereof, and a housing receiving said straight edge. A magnetic compass is mounted on the straight edge, and the housing includes folding portions adapted to enclose and protect the magnetic compass. A pair of sight pins are removably attachable to the compass and straight edge to provide a line of sight extending through the pivot point of the magnetized needle of the compass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.