Patent · US Active

Photo-electric smoke detector using single emitter and single receiver

US11302166B2 · kind B2 · utility

0Cited by
14References
15Claims
0Family size

Assignee

Inventor

Key dates

Filing dateOct 29, 2020
Grant dateApr 12, 2022
Priority date—
Expiry dateOct 29, 2040

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG08B29/145
  • WIPO fieldControl
  • WIPO sectorInstruments

Abstract

A smoke detector with an emitter and a receiver defining an angular distance there between less than 90°, the angular distance between the emitter and the receiver generating a back scatter effect, and a method of operating the smoke detector are provided. The smoke detector includes a housing defining a chamber for receiving ambient materials, an emitter configured to emit light (ex. infrared light or any light in the visible spectrum, such as blue light) into the chamber, a receiver configured to receive light reflected from the ambient materials in the chamber and generate output signals, and a controller configured to receive output signals from the receiver and determine whether a current condition of the chamber indicates a need to trigger an alarm.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.