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:
May. 07, 1991
Filed:
May. 25, 1989
Applicant:
Inventors:
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250239 ;
Abstract
An optical sensor unit for detecting a predetermined object to be detected comprises an optical element, a connector for connection to a wiring cable of an external equipment, and a printed circuit board having a predetermined printed wiring thereon for connecting the optical element to the connector while the optical element is completely sealed by the printed circuit board at the lower end thereof and by the case at the upper portion and sides thereof whereby reduction of quantity of the light emitted from the optical element due to collection of dust can be prevented and whereby the attachment and detachment operations of the optical sensor unit can be effected with ease.