Patents by Inventor Thierry Lonchampt

Thierry Lonchampt 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).

  • Method and apparatus for measuring thickness of a test part by an eddy current sensor, without contact and with lift-off compensation
    Patent number: 4727322
    Abstract: A method of measuring a characteristic, such as thickness, of a test part makes use of the variation in impedance of a coil in a senor caused by eddy currents generated as a result of the proximity of the test part. The sensor measures two orthogonal components of the complex impedance. In use the sensor is moved towards the test part until one component of the impedance reaches a predetermined value and the characteristic measured as the value of the other component. The first component is selected during calibration as that component which is most sensitive to variation in the distance between the sensor and the test part.
    Type: Grant
    Filed: December 17, 1985
    Date of Patent: February 23, 1988
    Assignee: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."
    Inventors: Thierry Lonchampt, Gerard Y. Mangenet