Patents by Inventor Ken Q. Mac

Ken Q. Mac 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 passively trimming sawyer motors to correct for yaw errors
    Patent number: 6127790
    Abstract: A system is disclosed for correcting for rotational errors in a linear motor system. A shunt resistor is coupled in parallel with a winding of a phase of a motor of the linear motor system to correct for rotational errors caused by differences in the magnetic characteristics of the motors comprising the linear motor system. Yaw error values for the motors are sequentially measured to determine the value of the shunt resistor, and its location on a winding of a phase motor of the linear motor system.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: October 3, 2000
    Assignee: Electroglas, Inc.
    Inventors: Paul C. Colby, Ken Q. Mac