Patents by Inventor Roger F. Bourquin

Roger F. Bourquin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Piezo electric resonator differential accelerometer
    Patent number: 5193392
    Abstract: A monoaxial differential accelerometer with frequency output, includes a thin monolithic piezoelectric sensitive plate (10) in which plane a sensitive axis (X) is located. The plate (10) comprises two rectilinear slits (15, 15') parallel with the sensitive axis (X) and defining between them two zones of vibration aligned along the sensitive axis (X) and identically sensitive to the temperature variations. Each vibration zone is located between two electrodes (3, 4, 3, 4') to form resonators (20, 21) whose frequency variations are added for an acceleration directed along the sensitive axis (X) and whose the frequency variations are subtracted for an acceleration directed in a plane perpendicular to the sensitive axis (X). The resonators (20, 21) are inserted in the circuits of two oscillators (73, 74) whose beat frequency constitutes the output signal of the differential accelerometer.
    Type: Grant
    Filed: January 8, 1991
    Date of Patent: March 16, 1993
    Assignee: Etat Francais represented by the Delegue General pour l'Armement
    Inventors: Raymond J. Besson, Roger F. Bourquin, Bernard M. Dulmet, Pierre C. Maitre