The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 2016
Filed:
Apr. 30, 2013
Applicant:
Honeywell International Inc., Morristown, NJ (US);
Inventors:
Assignee:
LIFE SAFETY DISTRIBUTION AG, Hegnau, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 33/00 (2006.01); G01N 29/024 (2006.01); G01N 29/24 (2006.01); G08B 17/10 (2006.01); G08B 29/14 (2006.01); G01N 15/00 (2006.01); G01N 11/00 (2006.01);
U.S. Cl.
CPC ...
G01N 33/007 (2013.01); G01N 29/24 (2013.01); G08B 17/10 (2013.01); G08B 29/145 (2013.01); G01N 2011/0073 (2013.01); G01N 2015/0046 (2013.01);
Abstract
A method and apparatus of determining gas transport time from an input port to first and second ultrasonic detectors in a flow conduit for an aspirated smoke detector are provided. The method includes first measuring a transit time of ambient air between the detectors. Then, a different gas is injected into the conduit, and the time of injection is stored. The transit time is measured at least intermittently between the two ultrasonic detectors until a change therein is detected. A time of detected change is subtracted from the time of injection to establish a transport time for the aspirated smoke detector.