Patents by Inventor Michael R. Collingwood

Michael R. Collingwood 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).

  • Quantification method and system for corrosion and damage assessment
    Patent number: 6933718
    Abstract: The present invention provides a method for the direct measurement and quantification of the material volume loss on and beneath a first surface of a substrate and thus provides an accurate depiction of the profile of the substrate. The method of the invention comprises inducing multiple eddy currents in a test substrate to determine volume loss.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: August 23, 2005
    Assignee: The Boeing Company
    Inventors: Michael R. Collingwood, Steven G. Keener
  • Quantification method and system for corrosion and damage assessment
    Publication number: 20030025497
    Abstract: The present invention provides a method for the direct measurement and quantification of the material volume loss on and beneath a first surface of a substrate and thus provides an accurate depiction of the profile of the substrate. The method of the invention comprises inducing multiple eddy currents in a test substrate to determine volume loss.
    Type: Application
    Filed: June 10, 2002
    Publication date: February 6, 2003
    Applicant: The Boeing Company
    Inventors: Michael R. Collingwood, Steven G. Keener
  • Method and system for measuring the volume loss of a metal substrate
    Patent number: 6285183
    Abstract: The present invention provides a method for the direct measurement and quantification of the material volume loss on the surface of a substrate and thus provides an accurate depiction of the surface profile of the surface. The method of the invention comprises inducing eddy currents in a test substrate, measuring the magnitude of the eddy current produced within the substrate at a plurality of locations on the surface of the substrate, and converting the measured eddy current magnitudes at the locations to corresponding volume losses on the test surface using the eddy current magnitude measurements of a reference substrate having defects of predetermined volume loss. Typically, the measurements of the eddy current magnitude on the test surface are converted to actual volume losses by multiplying the measured eddy current magnitude for a sector of the test substrate by the area of the sector and a calibration factor (Cf) representing the volume per unit area eddy current magnitude.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: September 4, 2001
    Assignee: McDonnell Douglas Corporation
    Inventors: Michael R. Collingwood, Steven G. Keener
  • Portable through-door intercom
    Patent number: 4894858
    Abstract: A through-door security intercom that clamps on the free edge of a door of any conventional thickness. Clamping is effected by constant-force flat springs, which springs also provide current paths. The springs are pre-bent at acute angles at predetermined points, to aid in mounting of the outside unit on the door. The inside unit is mounted on the door due to the force created by the constant-force springs which are coiled on spools. Brushes in the inside unit engage the springs and complete the electric circuit.
    Type: Grant
    Filed: May 26, 1989
    Date of Patent: January 16, 1990
    Inventor: Michael R. Collingwood