Masking to eliminate direct line of sight between light emitter and light receiver in a smoke detector
US12270760B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2023 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Aug 31, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/066
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A cap for a light emitter and/or light receiver of a smoke detector for eliminating a direct line of sight between the light emitter and the light receiver is disclosed. The cap comprises an enclosure of a predefined profile having a predetermined open area at a predetermined position on the enclosure, which is adapted to be removably fitted over one or more of the light emitter and/or the light receiver. The cap upon fitting over any of the light emitter and the light receiver, the cap blocks a direct line of sight between the light emitter and the light receiver and allows the light receiver to receive only the light being reflected by smoke and a predefined amount of clean air signal present within the smoke detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.