Defective earth testing for an electric fence energizer
CA 2179928 A1 · Owner: Eriksson, Lars-Arne · Inventors: Karlsson, Goran Karl-Olov; Eriksson, Lars-Arne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an electric fence energizer there is an exterior earth connection such as an earth connection post (16). The electric fence energizer comprises in the conventional way a transformer (T) having a primary winding (L1) and a secondary winding (L2), one exterior terminal (9) of which is connected to the conductor (17) in the electric fence and the other exterior terminal (11) is connected to the earth connection, high voltage pulses being induced over the secondary winding (L2) when voltage pulses are applied over the primary winding (L1). For a determination of the quality of the earth connection the voltage over a small part of the secondary winding is obtained capacitively by …
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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 29, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 29, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 29, 2016.
- 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.