Patents by Inventor Larry Carmichael

Larry Carmichael 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).

  • Method and apparatus for storing vacuum gauge calibration parameters and measurement data on a vacuum gauge structure
    Publication number: 20070251293
    Abstract: A method and apparatus for measuring gas pressure by combining an ionization gauge with at least one other vacuum sensor. Nonvolatile memory coupled to the vacuum gauge contains calibration parameters unique to each individual sensor based on factory calibration. The nonvolatile memory may contain calibration parameters for a heat-sensitive vacuum sensor to compensate for the temperature gradients generated by the ionization gauge. The calibration parameters are a function of calibration data determined when the ionization gauge is both on and off. The nonvolatile memory may store a window of measurement data of the vacuum gauge that is updated at predetermined time intervals and in response to an event, such as an error event, to aid in investigating the cause of vacuum gauge malfunction or failure.
    Type: Application
    Filed: June 20, 2007
    Publication date: November 1, 2007
    Inventors: Paul Arnold, Larry Carmichael, Paul Rutt
  • Method and apparatus for storing vacuum gauge calibration parameters and measurement data on a vacuum gauge structure
    Publication number: 20060123915
    Abstract: A method and apparatus for measuring gas pressure by combining an ionization gauge with at least one other vacuum sensor. Nonvolatile memory coupled to the vacuum gauge contains calibration parameters unique to each individual sensor based on factory calibration. The nonvolatile memory may contain calibration parameters for a heat-sensitive vacuum sensor to compensate for the temperature gradients generated by the ionization gauge. The calibration parameters are a function of calibration data determined when the ionization gauge is both on and off. The nonvolatile memory may store a window of measurement data of the vacuum gauge that is updated at predetermined time intervals and in response to an event, such as an error event, to aid in investigating the cause of vacuum gauge malfunction or failure.
    Type: Application
    Filed: December 14, 2004
    Publication date: June 15, 2006
    Applicant: Helix Technology Corporation
    Inventors: Paul Arnold, Larry Carmichael, Paul Rutt