Patents by Inventor Christopher R. Pandolfo

Christopher R. Pandolfo 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).

  • Apparatus and method to calibrate a servo sensor
    Patent number: 6833973
    Abstract: A method to calibrate a servo sensor disposed on a magnetic tape head disposed adjacent a magnetic tape, where that magnetic tape includes at least one servo edge comprising an interface between a first recorded signal and a second recorded signal, whereby the servo sensor is capable of detecting that first recorded signal and that second recorded signal, and whereby an independent position sensor provides an IPS signal comprising the position of the tape head with respect to the tape path. Applicants' method determines and uses initial servo signal information and initial IPS signal information to determine an initial transfer function. That initial transfer function is used to determine a positioning signal where the tape head is alternatingly moved in a first direction and an opposing second direction along a first axis as the tape moves along a tape path such that the position of the magnetic head along the first axis as a function of time comprises a periodic function having the positioning signal.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: December 21, 2004
    Assignee: International Business Machines Corporation
    Inventors: Alex Chliwnyj, Christopher R. Pandolfo, David L. Swanson, Steven C. Wills
  • Apparatus and method to calibrate a servo sensor
    Publication number: 20040001267
    Abstract: A method to calibrate a servo sensor disposed on a magnetic tape head disposed adjacent a magnetic tape, where that magnetic tape includes at least one servo edge comprising an interface between a first recorded signal and a second recorded signal, whereby the servo sensor is capable of detecting that first recorded signal and that second recorded signal, and whereby an independent position sensor provides an IPS signal comprising the position of the tape head with respect to the tape path. Applicants' method determines and uses initial servo signal information and initial IPS signal information to determine an initial transfer function. That initial transfer function is used to determine a positioning signal where the tape head is alternatingly moved in a first direction and an opposing second direction along a first axis as the tape moves along a tape path such that the position of the magnetic head along the first axis as a function of time comprises a periodic function having the positioning signal.
    Type: Application
    Filed: June 27, 2002
    Publication date: January 1, 2004
    Inventors: Alex Chliwnyj, Christopher R. Pandolfo, David L. Swanson, Steven C. Wills