Method and device for welding in a thermally ionized gas
CA 1096949 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Willems, Gerardus A.M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of plasma-MIG welding in which a MIG-arc is maintained between a consumable electrode continuously fed through a nozzle towards a workpiece and said workpiece in a gas plasma which is generated by a plasma arc maintained between a non-consumable plasma electrode upstream of the nozzle and a second electrode in a gas flow passing through said nozzle the power for maintaining said MIG-arc being supplied to the consumable electrode at a point situated downstream of said non-consumable plasma electrode and within said gas plasma; as that part of the consumable electrode at the level of the non-consumable plasma electrode does not carry current, instability of the plasma arc due to …
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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 March 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 1998.
- 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
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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.