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:
Jul. 25, 1995
Filed:
Jun. 01, 1994
Applicant:
Inventor:
Katsuhiko Tomita, Miyanohigashi, JP;
Assignee:
Horiba, Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
250343 ; 2503381 ;
Abstract
A compact infrared gas analyzer capable of reducing the quantity of heat generated from a radiation source and the effects of temperature on samples is provided. A shutter is provided between the radiation source and the sample cell and/or between the sample cell and a detector with the shutter in a closed position. The shutter is opened and closed during measurement. A resistor comprising a resistance element made of one of RuO.sub.2, W, SnO.sub.2, FeCrAlY, Pt, Pt-Rh and Pt-Pd, formed on an AlN substrate, may be used as the radiation source, with the radiation source and the shutter being interrelatedly controlled.