Combination airborne substance detector

Details Combination airborne substance detector Combination airborne substance detector

2007-07-24

2007-07-24

Tweel, Jr., John (Department: 2612)

Communications: electrical

Condition responsive indicating system

With particular system function

C340S628000

Reexamination Certificate

active

10981904

ABSTRACT:
A combination airborne substance detection apparatus includes an enclosure, a first module disposed within the enclosure for detecting the presence of a quantity of a first airborne substance, a second module disposed within the enclosure for detecting the presence of a quantity of a second airborne substance, and an alarm module for producing a first perceivable emission when the first substance is detected and for producing a second perceivable emission when the second substance is detected. The first perceivable emission includes at least one of an audible and a visible emission that is distinguishable from the second perceivable emission. The first and second detector modules are each capable of independently and continuously detecting the first and second substances, respectively.

REFERENCES:
patent: 5557262 (1996-09-01), Tice
patent: 5691703 (1997-11-01), Roby et al.
patent: 5801633 (1998-09-01), Soni
patent: 5969604 (1999-10-01), Tice
patent: 6897774 (2005-05-01), Costa et al.
patent: 6967582 (2005-11-01), Tice et al.

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