Tester for a plurality of circuit breakers having a range of rated currents and multiple trip functions
CA 2435169 A1 · Owner: Mccormick, James M. · Inventors: Mccormick, James M.; Schmalz, Steven C.; Walz, Michael F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tester for in situ testing of a plurality of circuit breakers having a range of rated currents and multiple trip functions includes a plurality of , power, resistors of known impedance an electronic switch associated with each power resistor connecting the resistor in series with the load terminal of the circuit breaker, under test, and a controller that turns on a number of the switches selected to, collectively draw through the associated power resistors a test current that is a, function of the rated current and sufficient to trip the circuit breaker within a selected, time window. Turn on of the electronic switches is also controlled to generate a, current waveform appropriate …
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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 July 10, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 10, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 2025.
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Timeline
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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.