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:
Mar. 02, 1982
Filed:
Mar. 23, 1981
Applicant:
Inventor:
Thomas A Barr, Huntsville, AL (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
422 95 ; 422 98 ;
Abstract
An explosive gas detector wherein power to a catalytic impedance element is held at a constant impedance level via a D.C., amplified, automatic bridge balancing circuit, and gas levels are indicated by an electrical meter connected between the output of a bridge and an adjustable level D.C. bias.