Patent · US Expired

Carbon monoxide and smoke detection apparatus

US6819252B2 · kind B2 · utility

38Cited by
66References
28Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 25, 2003
Grant dateNov 16, 2004
Priority date—
Expiry dateJul 25, 2023

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY02A50/20
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A smoke sensor and a carbon monoxide sensor are integrated into a common detector housing. The smoke sensor is coupled to a smoke detector control integrated circuit which generates a binary output signal indicative of the presence of smoke. This signal is coupled to a programmed microprocessor in the detector housing. The carbon monoxide sensor is also coupled to the microprocessor. Outputs from the two sensors are processed substantially independently. In the presence of smoke, the smoke alarm is generated by the microprocessor. In the presence of sufficient levels of carbon monoxide, in the absence of smoke, a carbon monoxide alarm will be generated.

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