Patents by Inventor Andrew M. Patzwald

Andrew M. Patzwald 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).

  • Scale structures and methods usable in an absolute position transducer
    Patent number: 6867412
    Abstract: An absolute position-sensing device is usable to measure the relative position of two elements. An absolute scale includes an integrated track extending along a measuring axis of the scale. The integrated track includes a plurality of code portions interleaved with, or embedded in, a plurality of periodic portions. Each periodic portion includes a plurality of periodically-placed incremental scale elements. Each code portion includes a plurality of code elements indicative of an absolute measurement value. The code elements are arranged in code element zones along the direction perpendicular to the motion axis, and are detectable by associated variations along the direction perpendicular to the motion axis. The offset of the periodically placed elements relative to a readhead of the device is combined with the absolute measurement value to determine an absolute position.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: March 15, 2005
    Assignee: Mitutoyo Corporation
    Inventors: Andrew M. Patzwald, Kim W. Atherton
  • Scale structures and methods usable in an absolute position transducer
    Publication number: 20040089796
    Abstract: An absolute position-sensing device is usable to measure the relative position of two elements. An absolute scale includes an integrated track extending along a measuring axis of the scale. The integrated track includes a plurality of code portions interleaved with, or embedded in, a plurality of periodic portions. Each periodic portion includes a plurality of periodically-placed incremental scale elements. Each code portion includes a plurality of code elements indicative of an absolute measurement value. The code elements are arranged in code element zones along the direction perpendicular to the motion axis, and are detectable by associated variations along the direction perpendicular to the motion axis. The offset of the periodically placed elements relative to a readhead of the device is combined with the absolute measurement value to determine an absolute position.
    Type: Application
    Filed: November 12, 2002
    Publication date: May 13, 2004
    Applicant: Mitutoyo Corporation
    Inventors: Andrew M. Patzwald, Kim W. Atherton