Patents by Inventor Barton V. White

Barton V. White 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: 6570663
    Abstract: A calibration method and a calibration device for two-point cold calibration are suitable for calibration of any visual measuring system having a width analyzer. In particular, the method and the calibration device are used to calibrate a CCD camera in a visual measuring system used to monitor the diameter of a crystal rod being grown by a crystal growing apparatus using the well-known Czochralski process. The calibration method takes into account non-linear error and avoids the need to actually grow crystals for calibration. The calibration device is specifically designed for quick and accurate set-up.
    Type: Grant
    Filed: July 7, 2000
    Date of Patent: May 27, 2003
    Assignee: Seh America, Inc.
    Inventors: Leo N. Altukoff, Mike W. Mayer, Barton V. White
  • Patent number: 6453742
    Abstract: A system for measuring the rotational speed of a shaft driven by a motor. The system includes a rotation measurement device having a rotatable sensor and configured to generate a signal corresponding to rotation of the sensor. The rotation measurement device may be supported by a fixture mountable on the motor. A coupler is associated with the sensor and includes a gripping surface configured to contact and grip the end-surface of the shaft to couple the sensor to the shaft and impart the rotation of the shaft to the sensor.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: September 24, 2002
    Assignee: SEH America, Inc.
    Inventors: Barton V. White, Allen W. Kraxberger, Jr.
  • Patent number: 6106612
    Abstract: A level detector detects the level of an approximately flat surface of a substance in a container. The level detector illuminates a portion of the surface, and detects the location of the illuminated portion on the surface. Based on detecting the location of the illuminated portion, the level detector generates a signal related to the level of the surface, which can represent the level of the surface in a direction perpendicular to the surface. A method for determining a level of a surface of a substance in a container includes illuminating a portion of the surface, detecting a location of the illuminated portion on the surface, and generating a signal related to the level of the surface based on the result of detecting the location of the illuminated portion.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: August 22, 2000
    Assignee: SEH America Inc.
    Inventor: Barton V. White
  • Patent number: 5961716
    Abstract: A CCD camera is used to measure the diameter of a growing crystal through optical recognition of the luminous ring at a crystal-melt interface. The result is an optical diameter control method and apparatus that eliminates the negative effects of orbit, melt-level and incorrect camera angle. The CCD camera is positioned such that it focuses on a full half of the circumference of the crystal as it is being grown. An automatic control system uses two points diametrically opposed on the crystal to measure the diameter, and a third point on the crystal closest to the camera to compute the melt level error. The automatic control system controls a crucible height and a crystal pull rate to optimize crystal diameter.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: October 5, 1999
    Assignee: SEH America, Inc.
    Inventors: Barton V. White, David J. Vickrey