Holding circuit for static converter valves
CA 1053327 A · Owner: Asea Aktiebolag · Inventors: Juhlin, Lars-Erik; Ekstrom, Ake
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a static convertor which comprises at least one rectifier bridge with valves or rectifiers arranged in commutating groups and a control pulse emitter connected to the valves by individual control circuits, in order to ensure that during operation one valve in each group always receives an ignition signal a, holding circuit is provided for each valve and its control circuit and a signal output for indicating valve ignition. The holding circuit is connected on its input side to the signal outputs for the valves in the proper commutating group in such a way that the holding circuit is switched on by the signal outputs of its own valves and switched off by the signals from the signal outputs …
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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 April 24, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 24, 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.