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:
Jun. 28, 1983
Filed:
Apr. 23, 1981
Masami Kataoka, Kariya, JP;
Nobumasa Higo, Toyota, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
In a flow rate transducer of the type arranged to detect the rotational speed of a blade wheel by transmitting a light beam from one side thereof to the other, a printed circuit board for carrying thereon a light-emitting element and a light-receiving element is provided. The light-emitting element and the light-receiving element are received in recessed portions of a casing made of a transparent material, where all parts including the printed circuit board contained in the casing are fixedly supported by a synthetic resin filling. The optical axes of the light-emitting element and the light-receiving element can be readily adjusted to align before assembled in the casing. The size and shape of the recessed portions may be arranged to correspond to the size and shape of the corresponding light-emitting element and the light-receiving element so that optical axes alignment can be automatically performed when fitted therein.