Patents Assigned to Britoil Public Ltd. Co.
  • Remote calibration of acoustic transducer array
    Patent number: 4648078
    Abstract: An array of acousto-electric transducers 1,2, e.g. a hydrophone streamer, is calibrated by disconnecting the common ground wire 17, to which all the transducer shields 14 are connected, from ground and connecting it instead to a local oscillator 18. Test signals from the oscillator are capacitively coupled into each transducer via the inherent capacitances of the insulated lead throughs 15, 16 in the transducer shields 14.
    Type: Grant
    Filed: October 17, 1984
    Date of Patent: March 3, 1987
    Assignees: Britoil Public Ltd. Co., Standard Telephone and Cables Ltd. Co.
    Inventors: Kenneth S. Darton, Jonathan P. Larsen