Outside welding
CA 1205528 A · Owner: Crc-Evans Pipeline International, Inc. · Inventors: Thompson, Floyd M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an automatic arc welding machine where a weld torch follows lateral traverses across a groove during travel along the length of the groove. A unit is provided to produce a control signal which is representative of the difference between the arc current near the end of each traverse and the base arc current at the center of the traverse. A unit is also provided which arrests travel of the torch on each traverse each time the integral of the difference reaches a reference value.
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 June 3, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 3, 2003.
- 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.