Patent Number: 6,166,648

Title: Aspirated detector

Abstract: An aspirated-type detector includes a housing with an internal ambient condition sensing region and a sensor carried therein. The housing is perforated with ambient atmosphere inflow ports. A fan or similar device lowers the pressure in the internal region thereby producing a positive inflow of adjacent, external ambient atmosphere into the sensing region. Alternatively, the fan can be operated to inject exterior ambient atmosphere into the sensing chamber under positive pressure. The fan can also be modularized. The detector can incorporate control circuitry for supervisory or signal processing purposes.

Inventors: Wiemeyer; Jim (Homer Townership, IL), Shoaff; Thomas William (Warrenville, IL), Schoenfelder; George (Batavia, IL), Tice; Lee (Bartlett, IL)

Assignee: Pittway Corporation

International Classification: G08B 17/113 (20060101); G08B 17/10 (20060101); G08B 017/10 ()

Expiration Date: 12/26/2017