Patents by Inventor Robert Paul Randall

Robert Paul Randall 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).

  • X-ray tube arrangement
    Patent number: 4112397
    Abstract: In an X-ray tube arrangement of the kind in which an electron beam is deflected along a target/anode there is provided means for monitoring the progress of the deflection to correct for errors. Detectors are provided to receive radiation from the regions of intended reversals in the scan. By monitoring maxima and minima in the waveform from those detectors the true position of the reversals can be estimated.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: September 5, 1978
    Assignee: EMI Limited
    Inventor: Robert Paul Randall
  • Radiography
    Patent number: 4101773
    Abstract: Radiographic apparatus is described in which an X-ray tube incorporates a cathode which is heavily driven to produce a strong electron beam. In order to minimize the demands placed on the cathode, the X-radiation emitted by the tube (or the electron beam produced by the cathode and causing the emission of the X-radiation) is monitored and used to control the supply of energy (e.g. heater current) to the cathode.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: July 18, 1978
    Assignee: EMI Limited
    Inventors: Christopher Archibald Gordon LeMay, Robert Paul Randall