Process and apparatus for the location of cable defects
CA 2118331 A1 · Owner: Hagenuk Kmt Kabelmesstechnik Gmbh · Inventors: Lefeldt, Ekkehard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process used to locate cable faults in particular to, locate non-burnout cable faults in the vicinity of branched cables. The pulse reflection method is used and a capacitor is charged and then discharged across a spark gap by mean of spark- over at a fault in the cable. Simultaneously with a main capacitor in an impulse wave generator a second pulse, capacitor is discharged into the cable by means of a short circuit switch. The resulting reflection wave is input via a decoupler into a first channel of a digital storage unit. After opening the short circuit switch the main capacitor in, the impulse wave generator and the second pulse capacitor are again charged and then again discharged …
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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 18, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 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.