Pulsed arc welding
CA 1281083 C · Owner: Commonwealth Scientific And Industrial Research Organization · Inventors: Brougham, William Kenneth; Leske, David Michael; Ogilvie, Graeme John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pulsed arc welding system comprises a current pulse generating circuit and a background current generating curcuit including a DC power supply circuit adapted for connection to a load via an electrode wire. A switch causes current pulses generated by the current pulse generating circuit to be applied to the load. The voltage applied by the circuits across the load is detected and the switch controls the pulse repetition rate to maintain a substantially constant predetermined arc voltage across the load. The invention is characterized by determining the lowest arc voltage that occurs in a predetermined time period immediately preceding the onset of each current pulse. This arrangement …
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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 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2008.
- 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.