Circuit for driving a signaling device
US5912617A · kind A · utility
5Cited by
3References
34Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 15, 1997 |
| Grant date | Jun 15, 1999 |
| Priority date | — |
| Expiry date | Sep 15, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/806
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit for controlling the reserve lamp of a vehicle's fuel level indicator instrument. The circuit uses a switch controlled by an extremely asymmetric clock signal periodically to switch, for a very short time, the signal provided by the level sensor coupled to a comparator operable to compare this signal with a threshold value for the purpose of determining the state of the reserve lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.