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:
Sep. 13, 2005
Filed:
Dec. 18, 2001
Emil Ackermann, Wattwil, CH;
Emil Ackermann, Wattwil, CH;
Optrel AG, Wattwil, CH;
Abstract
A glare protection device for a welding protective mask includes an active electro-optical protective filter () and an electronic circuit (). An UV-detector (UVD), which serves as an optical sensor, detects the welding light and, via an evaluation circuit (), generates a signal (sin) for controlling of the protective filter (). The signal corresponds to the detected UV intensity. The UV-detector includes a fluorescent layer (F) with an absorption in the UV range and an emission in the long-wave range corresponding to the spectral sensitivity of an assigned Si-photo detector (SD). This results in a simple and safe controlling of the protective filter, which is uninfluenced by the effects of extraneous light.