Device for calibrating and testing ring-shaped current clamps
CA 2001258 A1 · Owner: Koster, Dieter · Inventors: Koster, Dieter; Hansen, Diethard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for calibrating and testing ring-shaped current clamps comprises a calibration housing (1) with an outer conductor (3a, 3b) enclosing the current clamp (2) and, an inner conductor (5a, 5b) passing through the current clamp (2). The outer conductor (3a, 3b) encloses the current clamp (2) on all sides and is adapted to the shape of the current clamp (2). The calibration housing (1) also exhibits, with the current clamp (2) accommodated therein, an impedance ZL which is predetermined by a messuring system. These measures make it possible to measure the frequency response of the current clamp precisely, up into the GHz range. According to a preferred embodiment the calibration, housing …
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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 October 23, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 23, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 23, 2011.
- 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.