Patents by Inventor Brian Seemann

Brian Seemann 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 for capacitance temperature compensation and manufacturability in a dual plate capacitive pressure transmitter
    Patent number: 5281922
    Abstract: A two wire transmitter responsive to a pressure differential sensor includes a fixed module and a removable module. The fixed module is adapted for connection to an analog removable module having a compensation capacitance M.sub.A C.sub.DA or a digital removable module having compensation capacitance C.sub.DD. Capacitance compensation circuitry is included in the fixed module which includes a compensation capacitance C.sub.DM which is selected whereby M.sub.A C.sub.DA equals C.sub.DD when the analog removable module and the digital removable module are calibrated. This provides a pressure transfer function which is more linearized and less susceptible to temperature variations.
    Type: Grant
    Filed: March 17, 1993
    Date of Patent: January 25, 1994
    Assignee: Rosemount Inc.
    Inventors: Lyle E. Lofgren, John P. Schulte, Brian Seemann
  • Method and apparatus for capacitance temperature compensation and manufacturability in a dual plate capacitive pressure transmitter
    Patent number: 5237285
    Abstract: A two wire transmitter responsive to a pressure differential sensor includes a fixed module and a removable module. The fixed module is adapted for connection to an analog removable module having a compensation capacitance M.sub.A C.sub.DA or a digital removable module having compensation capacitance C.sub.DD. Capacitance compensation circuitry is included in the fixed module which includes a compensation capacitance C.sub.DM which is selected whereby M.sub.A C.sub.DA equals C.sub.DD when the analog removable module and the digital removable module are calibrated. This provides a pressure transfer function which is more linearized and less susceptible to temperature variations.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: August 17, 1993
    Assignee: Rosemount Inc.
    Inventors: Lyle E. Lofgren, John P. Schulte, Brian Seemann