Tank-level alarm control system
US4924703A · kind A · utility
19Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 5, 1989 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | May 5, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S73/05
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The gauge has an outer tube sealed at its lower end and adapted for attachment to the top wall of the tank. The gauge also has an inner tube axially movable within the outer tube. A float encircles the outer tube. Magnets respectively attach to the float and to the lower end of the inner tube, whereby a rising liquid causes the inner tube to rise as well. When the liquid level reaches a predetermined high level, a pencil-type magnet mounted within the inner tube operates a switch in an alarm box mounted in the top of the outer tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.