Patents by Inventor F. Leonard Sharp

F. Leonard Sharp 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).

  • Eddy current probe, incorporating multi-bracelets of different pancake coil diameters, for detecting internal defects in ferromagnetic tubes
    Patent number: 5049817
    Abstract: Eddy current probes for detecting internal defects in a ferromagnetic tube are disclosed. The probe uses a plurality of eddy current measuring means, each being operated at a different operating point on the impedance diagram. By operating more than one such eddy current measuring means simutaneously, noises by, for example, permeability variation of a ferromagnetic material and internal magnetic deposit, can be made less influential.
    Type: Grant
    Filed: June 8, 1990
    Date of Patent: September 17, 1991
    Assignee: Atomic Energy of Canada Limited
    Inventors: Valentino S. Cecco, F. Leonard Sharp
  • Circumferentially compensating eddy current probe with alternately polarized receiver coil
    Patent number: 4808927
    Abstract: An eddy current probe capable of detecting localized defects with 100% circumferential coverage in tubes, tubes under support plates etc., is disclosed. The probe employs multiple receiver coils with each excitation coil, operating in transmit-receive mode in which alternate receiver coils are electromagnetically polarized in opposite directions. The probe detects localized defects and eliminates concentric variations.
    Type: Grant
    Filed: February 19, 1987
    Date of Patent: February 28, 1989
    Assignee: Atomic Energy of Canada Limited
    Inventors: Valentino S. Cecco, Richard McIlquham, F. Leonard Sharp
  • Circumferentially compensating eddy current probe with alternately polarized transmit coils and receiver coils
    Patent number: 4808924
    Abstract: An eddy current probe capable of detecting defects independent of orientation, with complete circumferential coverage in tubes, tubes under support plates, etc., is disclosed. The probe employs multiple coils, operating in transmit-receive mode, in which alternate coils are electromagnetically polarized in opposite directions. The probe detects localized defects and eliminates concentric variations.
    Type: Grant
    Filed: February 19, 1987
    Date of Patent: February 28, 1989
    Assignee: Atomic Energy of Canada Limited
    Inventors: Valentino S. Cecco, Richard McIlquham, F. Leonard Sharp