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:
Aug. 03, 1976
Filed:
Nov. 05, 1974
Applicant:
Inventors:
Eduard Wilhelm Justi, Schapen, DT;
Henning Ewe, Braunschweig, DT;
Peter Wilhelm Brennecke, Lehre, DT;
Assignee:
Telefonaktiebolaget L M Ericsson, Stockholm, SW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ; H01C / ;
U.S. Cl.
CPC ...
324 / ; 324 / ; 338 34 ;
Abstract
A device for providing an early detection of aerosol products of combustion originating at least partly from a polyvinyl chloride substance. It comprises an electric resistance body of magnesium having a very small thickness and being arranged to be exposed to said aerosol products of combustion, an electric measuring circuit connected to the resistance body, and an indicating means arranged to generate an indicating signal in dependence on that the resistance of the resistance body exceeds a definite level.