Patents by Inventor Ross Underhill

Ross Underhill 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).

  • Pulsed eddy current sensor for precision measurement at-large lift-offs on metallic surfaces
    Patent number: 9091664
    Abstract: There is described a pulsed eddy current sensor for measurement of a lift-off distance over a surface of a metallic substrate (a metallic surface). The pulsed eddy current sensor comprises: a primary excitation coil to which are applied voltage pulses for generating primary magnetic fields, wherein an interaction of the primary magnetic fields with the metallic substrate produces secondary magnetic fields; and secondary pick-up probes, each of the secondary pick-up probes located at a different vertical distance from the metallic surface, the secondary pick-up probes used for measuring the primary and secondary magnetic fields and for producing a differential signal that is representative of the lift-off distance.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: July 28, 2015
    Inventors: Thomas Krause, Roderick J. McGregor, Alexandr Tetervak, Ross Underhill
  • PULSED EDDY CURRENT SENSOR FOR PRECISION LIFT-OFF MEASUREMENT
    Publication number: 20130328555
    Abstract: There is described a pulsed eddy current sensor for measurement of a lift-off distance over a surface of a metallic substrate (a metallic surface). The pulsed eddy current sensor comprises: a primary excitation coil to which are applied voltage pulses for generating primary magnetic fields, wherein an interaction of the primary magnetic fields with the metallic substrate produces secondary magnetic fields; and secondary pick-up probes, each of the secondary pick-up probes located at a different vertical distance from the metallic surface, the secondary pick-up probes used for measuring the primary and secondary magnetic fields and for producing a differential signal that is representative of the lift-off distance.
    Type: Application
    Filed: June 7, 2012
    Publication date: December 12, 2013
    Applicant: Her Majesty the Queen in Right of Canada as Represented by the Minister of National Defence
    Inventors: Thomas Krause, Roderick J. McGregor, Alexandr Tetervak, Ross Underhill