Method and arrangement for measuring an electric current with two light signals propagating in opposite directions using the faraday effect
CA 2173143 C · Owner: Menke, Peter · Inventors: Menke, Peter; Bosselmann, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method and arrangement for measuring an electric current with two opposing light signals, using the Faraday effect For measuring an electric current (I) in a current conductor (2), two opposing light signals (S T) are, transmitted through a Faraday element (3) surrounding the current conductor (2) and, after the passage through the Faraday element (3), are split, respectively into two partial, light signals. From these partial light signals an, intensity-normalized signal (PS, PT) is derived for each partial light signal (S, T). Provision is made of a Faraday element (3) having a negligible circular birefringence and a, signal processing unit for deriving a vibration-independent and …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed September 21, 1994 and granted November 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 21, 2016.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.