Patents by Inventor Edwin G. Brown

Edwin G. Brown 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).

  • Checking the location of moving parts in a machine
    Patent number: 4346383
    Abstract: In order to monitor the clearance between turbine blades and the casing of a turbine engine millimetric microwave radiation of wavelength .lambda. is propagated along a waveguide and through an aperture to a turbine blade. The aperture is small in relation to the area of the blade facing the aperture, and the aperture has a spacing of .lambda./4 or less from the blade. A balanced mixer compares the phase of the wave reflected from the blade with a reference pulse to provide a measure of the clearance.Circuits may be provided for monitoring the spacings between blades, and to indicate blades which are damaged.
    Type: Grant
    Filed: August 1, 1980
    Date of Patent: August 24, 1982
    Assignee: EMI Limited
    Inventors: Sydney C. Woolcock, Edwin G. Brown