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:
Nov. 17, 1992
Filed:
May. 01, 1991
Harvey V Blair, Tucson, AZ (US);
John McLin, Tucson, AZ (US);
Joseph F Halik, Tucson, AZ (US);
William J Coates, Oro Valley, AZ (US);
Allied-Signal Inc., Morris Township, Morris County, NJ (US);
Abstract
Detection apparatus employs a plurality of conduits, a plurality of photosensors, and a laser in a multi-port forward-scattering geometry to detect particles for each of a plurality of spatial sections (S.sub.1, . . . S.sub.n) of an enclosure. The photosensors are provided in two sets arranged at two different scattering angles to discriminate smoke from other particulate matter in sample flows which flow along the conduits and intersect the laser beam. The sample flows are discharged into a plenum and removed from the plenum via a single manifold. The laser can be backed up by an auxiliary laser.