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:
Apr. 24, 2001
Filed:
Sep. 24, 1998
Shouji Fujino, Tokyo, JP;
Hiroaki Yanagisawa, Tokyo, JP;
Jiro Nawa, Tokyo, JP;
Kazuji Kobayashi, Tokyo, JP;
Temco Japan Co., Ltd., Tokyo, JP;
Abstract
In the apparatus, in accordance with the presence or absence of a barrier, arrangement of its light-receiving and its light-emitting element is changed to avoid interference with its proper light-receiving operation from the barrier, which makesso the apparatus free from noise problems, malfunctions and like troubles caused by the interference. In construction, a cover,permeable to infrared is rotatably mounted on a base,A stationary base plate,and a movable base plate,which is rotatable together with the cover,are stacked together inside the cover,to realize a two-layer arrangement. Each of these base plates,carries a light-receiving element,and/or a light-emitting element,and assumes a substantially semicircular shape.