Patents Assigned to Hermes Electronics Limited
  • Hydrophones and similar devices
    Patent number: 4928263
    Abstract: An accelerometer-based direction finding and ranging transducer such as a hydrophone uses piezoelectric ceramic as the active material. Orthogonally arranged accelerometers share an inertial mass and resonance control system and the accelerometers together with a pressure hydrophone and electronics are all housed within one pressure vessel.
    Type: Grant
    Filed: February 10, 1989
    Date of Patent: May 22, 1990
    Assignee: Hermes Electronics Limited
    Inventors: Bruce A. Armstrong, Robert G. Dunn