Protective triggering of thyristors of a pulse generator
CA 1297953 C · Owner: F.L. Smidth & Co. A/S · Inventors: Taarning, Claus Ebbe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A protective triggering system protects the thyristor switch element of a pulse generator circuit controlling a pulse operated electrostative precipitator. The protective triggering is initiated for every pulse in the area around passage of the pulse current from positive to negative its object, being to supplement the spark-over released retriggering system so as to ensure that spark-overs occurring immediately after the current passage across zero do not cause damaging renewed thyristor current in the absence of a triggering signal.
Read the whole patent
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 March 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 2009.
- 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.