Method of mounting an azimuth indicator in an automobile
US4358886A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1980 |
| Grant date | Nov 16, 1982 |
| Priority date | — |
| Expiry date | Mar 25, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49826
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for demagnetizing an automobile is disclosed in which the terrestrial magnetism is detected by a direction-detecting sensor and the running direction of the automobile is indicated in response to a signal produced from the direction-detecting sensor. The distortion of the magnetic field caused by the permanent magnetism of the magnetic materials of the whole body of the automobile is erased by placing the automobile in an AC magnetic field which gradually increases from zero to a predetermined intensity and then gradually decreases to zero, and thereafter the direction-detecting sensor is mounted at the magnetic center of the automobile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.