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:
Jul. 17, 2007
Filed:
Feb. 24, 2006
Shinichi Tsukigi, Osaka, JP;
Katsunari Koyama, Osaka, JP;
Shinichi Tsukigi, Osaka, JP;
Katsunari Koyama, Osaka, JP;
Keyence Corporation, Osaka, JP;
Abstract
A projection head of a photoelectric sensor includes a first monitoring light receiving device for receiving a part of a light that the light projecting device emits, and a projected light quantity controlling device for executing a control such that a first monitor signal obtained by the first monitoring light receiving device is kept constant to maintain a quantity of projected light of the light projecting device at a predetermined value. Also, a controlling portion of a controller senses an abnormality of the projection head based on a monitor signal obtained from the first monitoring light receiving device to be monitored via the head cable, and suppress a light projected from the light projecting device. The separate type photoelectric switch, in which the projection head is separated from the controller, is constructed such that the abnormality of the projection head can be monitored on the controller side.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile