Patents by Inventor Shaw W. Fann

Shaw W. Fann 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).

  • Shock-tolerant multioscillator ring laser gyro
    Patent number: 6538745
    Abstract: The invention is a method and apparatus for processing signals with frequencies fL and fR from a multioscillator ring laser gyro, the method being repeated at regular time intervals. The difference f&Dgr;&thgr;, of fL and fR is a measure of the angular rotation rate of the ring laser gyro and the sum fF of fL and fR divided by 2 is the Faraday bias frequency. The first step of the method comprises determining two or more of the values MLP, MRP, MFP, and M&Dgr;&thgr;P of a set of functions ML(fL), MR(fR), MF(fF), and M&Dgr;&thgr;(f&Dgr;&thgr;). The second step comprises storing two or more processed values MLS, MRS, MFS, and M&Dgr;&thgr;S of the functions ML(fL), MR(fR), MF(fF), and M&Dgr;&thgr;(f&Dgr;&thgr;) if the corresponding values of MLP, MRP, MFP, and M&Dgr;&thgr;P are valid. A processed value is derived from the value for the present time interval and zero or more processed values for prior time intervals.
    Type: Grant
    Filed: February 8, 2000
    Date of Patent: March 25, 2003
    Assignee: Litton Systems, Inc.
    Inventors: Daniel A. Tazartes, John G. Mark, Brian T. Lottman, Shaw W. Fann