Induction heating apparatus comprising a static converter
CA 1068352 A · Owner: Tocco-Stel · Inventors: Theodet, Alain; Antier, Georges
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An induction heating apparatus comprising a static converter including a bidirectional controlled switch having a main thyristor and a diode connected in parallel to conduct in opposite directions. The converter comprises a first circuit for protection against the spurious turning on of the thyristor caused by overshoot voltages due to the sudden interruption of the current flowing through the charging inductor when the switch is turned off. This protection circuit comprises connected in series, across the charging inductor a diode and a capacitor which is, charged through the diode when the voltage across the inductor terminals becomes positive, and discharged through a currentlimiting …
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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
- Granted December 18, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 18, 1996.
- 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.