Anticipatory flammable gas detection system
US4074243A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1976 |
| Grant date | Feb 14, 1978 |
| Priority date | — |
| Expiry date | Jun 18, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0067
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An anticipatory flammable gas detection system is provided for quickly determining whether the rise rate of gas concentration will approach a potentially hazardous level. The system includes a detector for determining the rise rate of the gas concentration and a comparator for determining whether the rise rate exceeds a potentially hazardous level. An integrator or multivibrator is provided for determining how long the rise rate exceeds a predetermined value. If the rise rate exceeds the predetermined hazardous rate of rise for more than a predetermined period of time, an alarm signal is generated. Prevention of false alarms is accomplished by providing another comparator which determines whether the magnitude of gas concentration exceeds a preselected percentage of the lower flammable limit. Should the magnitude be less than the preselected percentage, the alarm signal will not be generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.