Fill indicator for fire extinguishing systems
US4384486A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1981 |
| Grant date | May 24, 1983 |
| Priority date | — |
| Expiry date | Mar 9, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/46
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved indicator for fill content of a fire extinguishing system including a pressure vessel having an outlet through which the fire extinguishing material may flow. The indicator includes a non-magnetic, closed housing, mounted on the vessel and having one end within the vessel and the other end exteriorly of the vessel. At least one of the vessel and the housing are sealed to the atmosphere and a visual access opening is provided on the exterior end of the housing to allow one to look into the interior of the housing. A tape is mounted within the housing for movement in a path past the visual access opening and includes indicia along its length. A first magnet is carried by the tape within the housing while a second magnet is mounted for movement on the exterior of the housing and a float is provided to move the second magnet proportional to the level of fire extinguishing material therein thereby causing, through magnetic interaction, the first magnet to move the tape so that its indicia may be observed as an indication of the level of fill within the vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.