Detector with dust filter and airflow monitor

Communications: electrical – Condition responsive indicating system – Specific condition

Reexamination Certificate

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Details

C340S606000

Reexamination Certificate

active

07129847

ABSTRACT:
A device for monitoring changes in airflow rates through detector dust filters in addition to assessing air for alarm indicators, including smoke, heat, gas, and relative humidity, is provided. A method monitors airflow through the detection device and provides a maintenance indication when the airflow has been reduced due to contamination of the dust filters.

REFERENCES:
patent: 5001463 (1991-03-01), Hamburger
patent: 5212983 (1993-05-01), Ott et al.
patent: 5217513 (1993-06-01), Armbruster
patent: 5451929 (1995-09-01), Adelman et al.
patent: 6107925 (2000-08-01), Wong
patent: 6166648 (2000-12-01), Wiemeyer et al.
patent: 6285291 (2001-09-01), Knox et al.
patent: 6543282 (2003-04-01), Thompson
patent: 6776817 (2004-08-01), Lentz et al.

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