Sensitivity test system for photoelectric smoke detector by changing light source intensity
US4321466A · kind A · utility
24Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1979 |
| Grant date | Mar 23, 1982 |
| Priority date | — |
| Expiry date | Nov 26, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/113
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tester device is disclosed for a photoelectric smoke detector. The tester, when actuated, increases the intensity of light emitted by a light source to simulate in the sample chamber by such light scattering and reflecting off chamber walls, an amount of light which would be scattered by a predetermined concentration of smoke to which a photoelectric sensor is responsive and causes an indication that the detector is functioning as intended.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.