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:
Sep. 07, 1993
Filed:
Jan. 21, 1992
Shunsuke Yoshioka, Nagasaki, JP;
Kenichi Hisamatsu, Nagasaki, JP;
Keiji Yoshikawa, Nagasaki, JP;
Shozo Kaneko, Nagasaki, JP;
Nobuya Watanabe, Nagasaki, JP;
Mitsubishi Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A temperature monitoring unit has a high degree of sensitivity and reliability even when monitoring the temperature of a relatively large rotary heating element. The temperature monitoring unit includes a mirror which is provided in the vicinity of the rotary heating element and is oriented to reflect infrared rays from the heating element in the radial direction thereof, the mirror being reciprocated linearly in the radial direction, a condenser lens provided radially outwardly of the heating element for converging the infrared rays reflected by the mirror, an infrared sensor on which the converged rays impinge, a plate provided between the mirror and the lens and which has a slit therein that is elongate in a direction approximately perpendicular to the surface of the heating element, and an image processor receiving the output of the infrared sensor. The sensitivity is high because infrared rays from around the thermal point of the heating element are blocked by the plate. Moreover, because the visual field is elongate in the radial direction of the heating element, the mirror can quickly scan the entirety of the heating element.