Compensation of static and/or quasi-static magnetic fields in magnetoelastic force and torque transducers
CA 2032584 C · Owner: Nidmark, Sverker · Inventors: Sobel, Jarl; Nidmark, Sverker; Hoffman, Bertil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
If the B-field of a body with a sinusoidal symmetrical magnetization exhibits even harmonics, this means that the body also has a superimposed static and/or quasi-static magnetization. The invention comprises a method and a device for determining and measuring, respectively the, content of even harmonics (8). The content corresponds to the degree of static and/or quasi-static magnetization and is used as input signal to a regulator (11) which with the, aid of a direct current in, for example a separate winding, (14), reduces the static and/or quasi-static magnetization to zero.
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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 December 18, 1990 and granted April 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.