Liquid level alarm apparatus for a tank of a vehicle
US4037193A · kind A · utility
15Cited by
9References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 4, 1975 |
| Grant date | Jul 19, 1977 |
| Priority date | — |
| Expiry date | Sep 4, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/70
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A liquid level alarm apparatus for a tank of a vehicle comprising a float having a permanent magnet, a pair of electrical contacts opened or closed in response to the proximity of said magnet, and a stopper for limiting the upward movement of the float, said contacts being connected by leads to an electric circuit comprising an alarm device. The contacts are maintained in a closed condition when the liquid in the tank is above a predetermined level and the contacts are separated, which operates the alarm of the alarm device, when the liquid in the tank is below the predetermined level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.