Photoelectric control circuit for digital magnetic compass
US3944813A · kind A · utility
10Cited by
1References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 8, 1974 |
| Grant date | Mar 16, 1976 |
| Priority date | — |
| Expiry date | Aug 8, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For use in an electro-optically sensed magnetic compass a photoelectric control circuit in which the duty cycle of the illumination source is varied to energize the source only until a valid electrical output signal is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.