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. 06, 1989
Filed:
Nov. 09, 1987
Yuichi Obara, Hitatsuka, JP;
Kenichi Fuse, Hitatsuka, JP;
Yoshihiro Onuma, Hitatsuka, JP;
Takao Toya, Ichihara, JP;
Kazuo Chiba, Ichihara, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
An optical switch having a pair of optical fibers which has a stopper projected on the inner surface of a housing, the paired large diameter optical fibers being formed at the ends thereof, inserted into the housing and contacted with the ends thereof opposed on the same axis with both ends of the stopper at a predetermined interval between relative end faces thereof, and a light shielding plate disposed telescopically in or out between the end faces of the optical fibers in the housing for conducting or interrupting an optical path over both the optical fibers, and an optical keyboard utilizing the optical switch.