Seismic vibrator control
CA 1192986 A · Owner: Shell Canada Limited · Inventors: De Kok, Robbert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for the control of vibratory seismic source said sources comprising at least a vibrator provided with a reaction mass and a coupling plate, the movement of which is responsive to an electrical input signal the said plate being, adapted to be brought into contact to the earth surface comprising at least one means being adapted to measure the acceleration of the said plate and at least one means adapted to measure the acceleration of the reaction mass and means to derive corresponding force signals; at least a feedback loop for the said obtained force signals in order to be combined with the said input signal to the vibrator and the coupling plate. A method for controlling of …
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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 September 3, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 3, 2002.
- 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.