Measuring and testing – Gas analysis – Detector detail
Reexamination Certificate
2006-06-20
2006-06-20
Williams, Hezron (Department: 2856)
Measuring and testing
Gas analysis
Detector detail
C073S028010, C073S031070, C073S863810, C073S864810
Reexamination Certificate
active
07062953
ABSTRACT:
In a sampling tube-type smoke detector equipped with a smoke detection device detects smoke particles contained in the air suctioned from a monitored area through a sampling tube by an aspirator positioned in the downstream. The smoke detection device the sampling tube forms a lead-in tube and suctions air through the sampling tube in substantially a straight line. The lead-in tube is formed with a smoke sensor unit to detect smoke particles contained in the air. The aspirator comprises a rotating part which forms an actuator mechanism that discharges the air. The central axis of the lead-in tube and the rotational axis of the actuator mechanism of the aspirator are substantially on the same axis. The sampling tube-type smoke detector is provided to reduce pressure loss in the airflow traveling from the smoke detection device to the aspirator and to supply a low cost, compact smoke detection device driven by a small-sized fan.
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Egawa Yoshitaka
Yamano Naoto
Hochiki Corporation
Rogers David A.
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