Patents by Inventor Julian David Shaw

Julian David Shaw 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).

  • Methods and apparatus for NQR testing
    Patent number: 6100688
    Abstract: A method and apparatus for imaging within a sample space an object containing quadrupolar nuclei comprises irradiating the object to excite nuclear quadrupole resonance, applying to the object a magnetic field gradient having a profile Bo(x) such that the square of the profile (Bo(x))2 varies linearly with distance (x), detecting resonance response signals from the nuclei, and deriving an image from the response signals. A method of and apparatus for nuclear quadrupole resonance testing an object, and a method of and apparatus for detecting the presence of a particular substance containing a given species of quadrupolar nucleus, are also disclosed.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: August 8, 2000
    Assignee: BTG International Limited
    Inventors: John Alec Sydney Smith, Julian David Shaw
  • Methods and apparatus for NQR testing
    Patent number: 5814989
    Abstract: A method and apparatus for imaging within a sample space an object containing quadrupolar nuclei comprises irradiating the object to excite nuclear quadrupole resonance, applying to the object a magnetic field gradient having a profile Bo(x) such that the square of the profile Bo(x))2 varies linearly with distance (x), detecting resonance response signals from the nuclei, and deriving an image from the response signals. A method of and apparatus for nuclear quadrupole resonance testing an object, and a method of and apparatus for detecting the presence of a particular substance containing a given species of quadrupolar nucleus, are also disclosed.
    Type: Grant
    Filed: March 28, 1994
    Date of Patent: September 29, 1998
    Assignee: British Technology Group Limited
    Inventors: John Alec Syndney Smith, Julian David Shaw, Martin Blanz
  • Long scale display
    Patent number: 4114094
    Abstract: A digital voltmeter for measuring an input voltage which can lie in any one of M successive ranges comprises an input scaling device which scales the input voltage to produce a voltage lying in a single predetermined range, and which also produces a range signal indicative of the range in which the input voltage lies. An analogue-to-digital conversion circuit then converts the scaled voltage to a corresponding digital signal which has up to N significant decade figures of resolution, where N<M. The voltmeter has a display unit with M decades, each of which represents a fixed order of magnitude of the input voltage, and control means responsive to the range signal to direct the digital signal to the group of N adjacent decades of the display means appropriate to the magnitude of the input voltage.
    Type: Grant
    Filed: September 8, 1975
    Date of Patent: September 12, 1978
    Assignee: The Solartron Electronic Group Ltd.
    Inventors: John Gerald Cook, Julian David Shaw