Apparatus for monitoring a smoke detector

Details Apparatus for monitoring a smoke detector Apparatus for monitoring a smoke detector

2006-03-21

2006-03-21

Hofsass, Jeffery (Department: 2636)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S607000, C340S626000

Reexamination Certificate

active

07015820

ABSTRACT:
The proper function of a smoke detector of an enclosed space, such as a toilet or freight space or crew quarters in an aircraft, is monitored by at least two air pressure sensors which are so positioned that these air pressure sensors can measure an air pressure differential in the air flow into the smoke detector. If a pressure differential is detected the differential is evaluated in a central processing unit which produces a respective signal that indicates that the air flow and thus the smoke flow into the smoke detector is obstructed, whereby the smoke detector cannot function properly. This signal is visibly or audibly indicated.

REFERENCES:
patent: 4914425 (1990-04-01), Kaminaka et al.
patent: 5182542 (1993-01-01), Adelman et al.
patent: 5351035 (1994-09-01), Chrisco
patent: 5399864 (1995-03-01), Igarashi et al.

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