Patents by Inventor William C. Messner

William C. Messner 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).

  • Patent number: 11099210
    Abstract: A method of carrying out sub-resonant tapping in an atomic force microscope includes causing a probe that is disposed above a sample to be translated in a direction parallel to a horizontal plane defined by the sample and to oscillate in a vertical direction that is perpendicular to the horizontal plane about an equilibrium line that is separated from the horizontal plane by a vertical offset. As a result, the probe repeatedly taps a surface of the sample. Each tap begins with a first contact of the probe on the surface followed by a progressive increase in force exerted by the sample on the probe until a peak force is attained. The vertical offset is controlled by relying at least in part on a feature other than the peak force as a basis for controlling the vertical offset.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: August 24, 2021
    Assignee: Trustees of Tufts College
    Inventors: Piers Echols-Jones, William C. Messner, Igor Sokolov
  • Publication number: 20190391178
    Abstract: A method of carrying out sub-resonant tapping in an atomic force microscope includes causing a probe that is disposed above a sample to be translated in a direction parallel to a horizontal plane defined by the sample and to oscillate in a vertical direction that is perpendicular to the horizontal plane about an equilibrium line that is separated from the horizontal plane by a vertical offset. As a result, the probe repeatedly taps a surface of the sample. Each tap begins with a first contact of the probe on the surface followed by a progressive increase in force exerted by the sample on the probe until a peak force is attained. The vertical offset is controlled by relying at least in part on a feature other than the peak force as a basis for controlling the vertical offset.
    Type: Application
    Filed: January 30, 2018
    Publication date: December 26, 2019
    Inventors: Piers Echols-Jones, William C. Messner, Igor Sokolov
  • Patent number: 8695618
    Abstract: Methods of controllably creating three-dimensional (3D) combined-flow-interface patterns in multi-lane fluidic devices, and systems, apparatuses and software therefor. In one example, the 3D-pattern is created and varied as a function of one or more of the geometry of the inlets to a main fluidic channel in which the 3D-pattern is formed, the Reynolds number of the flows, the dimensions of the main fluidic channel and the inlets, and the spacing of adjacent inlets. In one embodiment particularly disclosed, differing 3D combined-flow-interface patterns are created using a three-lane fluidic device having a fixed inlet geometry. In another embodiment particularly disclosed, differing 3D combined-flow-interface patterns are created using a five-lane fluidic device having a fixed inlet geometry that can be used to effectively mimic variable inlet geometries.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: April 15, 2014
    Assignee: Carnegie Mellon University
    Inventors: Yong Tae Kim, William C. Messner, Philip R. LeDuc
  • Publication number: 20130014828
    Abstract: Methods of controllably creating three-dimensional (3D) combined-flow-interface patterns in multi-lane fluidic devices, and systems, apparatuses and software therefor. In one example, the 3D-pattern is created and varied as a function of one or more of the geometry of the inlets to a main fluidic channel in which the 3D-pattern is formed, the Reynolds number of the flows, the dimensions of the main fluidic channel and the inlets, and the spacing of adjacent inlets. In one embodiment particularly disclosed, differing 3D combined-flow-interface patterns are created using a three-lane fluidic device having a fixed inlet geometry. In another embodiment particularly disclosed, differing 3D combined-flow-interface patterns are created using a five-lane fluidic device having a fixed inlet geometry that can be used to effectively mimic variable inlet geometries.
    Type: Application
    Filed: December 22, 2011
    Publication date: January 17, 2013
    Applicant: CARNEGIE MELLON UNIVERSITY
    Inventors: Yong Tae Kim, William C. Messner, Philip R. LeDuc
  • Patent number: 8289659
    Abstract: Systems and methods for controlling the position of a magnetic head element and/or the magnetic head element to media spacing in a data storage device. At least one microactuator is embedded in a hard disk drive slider laterally displaced from the magnetic head element. Activation of the microactuator translates the magnetic head element in a lateral direction.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: October 16, 2012
    Assignee: Carnegie Mellon University
    Inventors: James A. Bain, William C. Messner
  • Patent number: 8243397
    Abstract: The present disclosure is directed to a micromachined rotary actuator constructed of a central portion and an outer portion at least partially surrounding the central portion and separated from the central portion by an in-plane gap. A plurality of arms are each connected at one end to the central portion and at another end to the outer portion so as to span the in-plane gap. The arms are constructed of a plurality of horizontally stacked materials positioned to enable the arms to bend in-plane when heated. Conductors are positioned within the actuator for heating the arms. Because of the rules governing abstracts, this abstract should not be used to construe the claims.
    Type: Grant
    Filed: June 20, 2007
    Date of Patent: August 14, 2012
    Assignee: Carnegie Mellon University
    Inventors: William C. Messner, James A. Bain, Gary K. Fedder
  • Patent number: 7948708
    Abstract: An apparatus, system, and method comprise a magnetoresistive head configured to respond to magnetization states of patterned cells formed on a patterned medium. The magnetoresistive head detects the magnetization states of at least two patterned cells formed on a patterned medium. The magnetoresistive head generates a readback signal based on the magnetization state of the at least two patterned cells. A detector circuit coupled to the head determines a bit pattern corresponding to the readback signal. A processor circuit coupled to the detector circuit determines positional information associated with the magnetoresistive head relative to the at least two patterned cells based on the bit pattern. The system further comprises a patterned medium.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: May 24, 2011
    Assignee: Carnegie Mellon University
    Inventors: William C. Messner, Hiroyuki Suzuki, James A. Bain, Vijayakumar Bhagavatula, Sheida Nabavi
  • Publication number: 20100238584
    Abstract: An apparatus, system, and method comprise a magnetoresistive head configured to respond to magnetization states of patterned cells formed on a patterned medium. The magnetoresistive head detects the magnetization states of at least two patterned cells formed on a patterned medium. The magnetoresistive head generates a readback signal based on the magnetization state of the at least two patterned cells. A detector circuit coupled to the head determines a bit pattern corresponding to the readback signal. A processor circuit coupled to the detector circuit determines positional information associated with the magnetoresistive head relative to the at least two patterned cells based on the bit pattern. The system further comprises a patterned medium.
    Type: Application
    Filed: March 23, 2009
    Publication date: September 23, 2010
    Inventors: William C. Messner, Hiroyuki Suzuki, James A. Bain, Vijayakumar Bhagavatula, Sheida Nabavi
  • Publication number: 20080314040
    Abstract: The present disclosure is directed to a micromachined rotary actuator constructed of a central portion and an outer portion at least partially surrounding the central portion and separated from the central portion by an in-plane gap. A plurality of arms are each connected at one end to the central portion and at another end to the outer portion so as to span the in-plane gap. The arms are constructed of a plurality of horizontally stacked materials positioned to enable the arms to bend in-plane when heated. Conductors are positioned within the actuator for heating the arms. Because of the rules governing abstracts, this abstract should not be used to construe the claims.
    Type: Application
    Filed: June 20, 2007
    Publication date: December 25, 2008
    Inventors: William C. Messner, James A. Bain, Gary K. Fedder
  • Patent number: 6754016
    Abstract: The invention relates to control systems for data storage media. More particularly, the invention relates to a system, method and apparatus for forming various frequency modulation patterns on storage media for providing position error signals. The invention also relates to forming various frequency modulation patterns on storage media for providing position error signals having a continuously varying frequency that is proportional to the position of a read/write transducer head within a track defined on a storage medium. The invention also relates to providing a demodulated signal that is proportional to a continuously varying position error signal frequency and thus to the position of the read/write head within a track defined on a storage medium.
    Type: Grant
    Filed: April 19, 2001
    Date of Patent: June 22, 2004
    Assignee: Carnegie Mellon University
    Inventors: William C. Messner, Jian-Gang Zhu, Xiangdong Lin
  • Patent number: 6480323
    Abstract: A device that includes a projection element positioned between first and second beam scanners configured in series and a two-dimensional display plane. An apparatus for controlling the first and second beam scanners is provided so that the angle of incidence and the point of incidence of a beam output from the series connected beam scanners onto the projection element are controlled. In that manner, each point on the projection element can be mapped to a line in the display plane. A method of mapping a point in the projection element to a line in the display plane is also disclosed.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: November 12, 2002
    Assignee: Carnegie Mellon University
    Inventors: William C. Messner, Daniel D. Stancil, Tuviah E. Schlesinger
  • Publication number: 20020154432
    Abstract: The invention relates to control systems for data storage media. More particularly, the invention relates to a system, method and apparatus for forming various frequency modulation patterns on storage media for providing position error signals. The invention also relates to forming various frequency modulation patterns on storage media for providing position error signals having a continuously varying frequency that is proportional to the position of a read/write transducer head within a track defined on a storage medium. The invention also relates to providing a demodulated signal that is proportional to a continuously varying position error signal frequency and thus to the position of the read/write head within a track defined on a storage medium.
    Type: Application
    Filed: April 19, 2001
    Publication date: October 24, 2002
    Inventors: William C. Messner, Jian-Gang Zhu, Xiangdong Lin