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. 07, 1980
Filed:
Sep. 11, 1978
Lawrence R Snowman, Liverpool, NY (US);
General Electric Company, Syracuse, NY (US);
Abstract
An optical particle detector is disclosed using a dark field optical system in which an air sample is illuminated and forward scattered light is collected in a zone centered about but excluding on-axis light. The collected light is then sensed to detect the presence of air borne light scattering particles. Particles of greatest interest are smoke particles. The system includes a self-contained light source and a photo detector suitable for operation by a dry cell. The optics are designed for high light gathering efficiency consistent with minimum space requirements and the internal design minimizes scattered light to achieve maximum smoke detection sensitivity.