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:
Dec. 09, 2008
Filed:
Oct. 19, 2005
Robert K. Hatch, San Diego, CA (US);
William D. Squire, San Diego, CA (US);
Harper J. Whitehouse, San Diego, CA (US);
Robert K. Hatch, San Diego, CA (US);
William D. Squire, San Diego, CA (US);
Harper J. Whitehouse, San Diego, CA (US);
Linear Measurements, Inc., San Diego, CA (US);
Abstract
The present invention provides an acoustic particle alarm comprising a particle sensor for indicating the concentration of particles exceeding a specified size and specified concentration, for particles entrained in a fluid flow impinging on a front face of the sensor, and a nozzle for directing the fluid flow such that the particles impact the sensor in a direction substantially normal to the front face of the sensor. Each particle impacting the front face of the sensor causes a response in an output of the sensor with amplitude that is monotonic in the momentum of the impinging particle.