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:
Jan. 26, 2021
Filed:
Apr. 14, 2016
Applicant:
Alphasense Limited, Essex, GB;
Inventors:
Paul Henry Kaye, Hertfordshire, GB;
Edwin Hirst, Hertfordshire, GB;
Assignee:
ALPHASENSE LIMITED, Great Notley, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 21/47 (2006.01); G01N 21/85 (2006.01); G01N 15/14 (2006.01); G01N 15/02 (2006.01); G01N 15/10 (2006.01); G01N 15/00 (2006.01);
U.S. Cl.
CPC ...
G01N 21/4738 (2013.01); G01N 15/0205 (2013.01); G01N 15/14 (2013.01); G01N 15/1459 (2013.01); G01N 21/85 (2013.01); G01N 2015/0038 (2013.01); G01N 2015/1075 (2013.01); G01N 2015/1486 (2013.01); G01N 2021/8578 (2013.01);
Abstract
An optical particle counter determines the velocity of particles passing through a particle detection zone, and thereby the velocity of gas flow, from both the measured time of flight of discrete particles and also the size of intensity peaks of scattered light. This is used to determine particle concentration and may be used to control an optional fan.