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. 21, 1990
Filed:
Mar. 08, 1989
Applicant:
Inventors:
Kousuke Takeuchi, Hirakata, JP;
Kenichi Shibata, Hirakata, JP;
Toshiharu Tanaka, Higashiosaka, JP;
Seiji Nishikawa, Ibaraki, JP;
Kazuhiko Kuroki, Uji, JP;
Shoichi Nakano, Hirakata, JP;
Assignee:
Sanyo Electric Co., Ltd., Moriguchi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ; G01J / ;
U.S. Cl.
CPC ...
250346 ; 2503383 ; 250343 ; 250352 ;
Abstract
An infrared gas analyzer using a pyroelectric infrared sensor, which includes a heating unit for heating the infrared sensor, a heating sensor for detecting its heating temperature and a temperature sensor for detecting the ambient temperature of the infrared sensor, and controls the heating unit so as to retain the ambient temperature of the infrared sensor at a constant so that the output error is small irrespective of the change in ambient temperature.