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. 01, 1980
Filed:
Mar. 14, 1977
Applicant:
Inventors:
Erwin Tresch, Zollikon, CH;
Zoltan Horvath, Mannedorf, CH;
Assignee:
Cerberus AG, Mannedorf, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356338 ; 250574 ; 350189 ; 340630 ;
Abstract
An optical smoke detector comprising a radiation source which transmits radiation into a predetermined spatial region and a radiation receiver to which there is delivered the radiation which is scattered by particles located along the radiation path. The radiation source possesses a substantially conical ring-shaped radiation characteristic or pattern and the radiation receiver is arranged substantially at or along the cone axis.