Scattered light smoke detector of the open type, in particular having a sidelooker led
US9666048B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2015 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Dec 1, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/49
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An open-type scattered light smoke includes a housing shell supporting a circuit substrate having at least one light emitter and one light receiver arranged thereon. The light emitter and the light receiver are arranged in a scattered light array having a scattered light volume located in the open air outside the smoke detector. The light emitter emits a light beam having a direction pay, with part of the path traveled by the directional ray between the light emitter and the scattered light volume running parallel to an outer face of the circuit substrate facing away from the housing shell. The light emitter may be an LED housed in a sidelooker package and the light receiver may be a photodiode housed in a reverse-gullwing package. A sensor surface of the photodiode is aligned opposite the scattered light volume through an opening in the circuit substrate that provides mechanical protection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.