Patents by Inventor John T. Balkwill

John T. Balkwill 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).

  • Multifiber design for microchannel plates
    Patent number: 4532171
    Abstract: Each of the multifibers which are stacked in parallel and compressed together to form a boule during the process of manufacturing microchannel plates is hexagonal in cross-section, and single fibers having thicker channel walls are placed at corners of the hexagon in order to prevent damages to corner fibers which are exposed to the strongest external forces.
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: July 30, 1985
    Assignee: Varian Associates, Inc.
    Inventor: John T. Balkwill
  • Multifiber design for microchannel plates
    Patent number: 4431694
    Abstract: Each of the multifibers which are stacked in parallel and compressed together to form a boule during the process of manufacturing microchannel plates is hexagonal in cross-section, and single fibers having thicker channel walls are placed at corners of the hexagon in order to prevent damages to corner fibers which are exposed to the strongest external forces.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: February 14, 1984
    Assignee: Varian Associates, Inc.
    Inventor: John T. Balkwill
  • Strip microchannel electron multiplier array support structure
    Patent number: 4126804
    Abstract: A linear array of electron multiplier microchannels is formed by fusing a plurality of solid core glass fibers into a rectangular array. A number of arrays is then sandwiched between a pair of glass plate support members fused into a linear arrangement followed by treating to form the electron multiplier. Treatment comprises subjecting the arrangement to an acid etch for removing the core material and hydrogen firing to activate the core walls for secondary electron emission. The apparatus finds application as an ion-electron converter in focal plane mass spectrometers where high electron gain is required.
    Type: Grant
    Filed: January 12, 1977
    Date of Patent: November 21, 1978
    Assignee: International Telephone and Telegraph Corporation
    Inventors: Adolf R. Asam, John T. Balkwill
  • Glass fiber drawing machine
    Patent number: 4121920
    Abstract: A glass drawing machine which has a movable oven that permits glass fibers to be drawn to size within a tolerance of .+-. 0.00025 inch.
    Type: Grant
    Filed: April 6, 1970
    Date of Patent: October 24, 1978
    Assignee: International Telephone & Telegraph Corp.
    Inventor: John T. Balkwill
  • Method for making strip microchannel electron multiplier array
    Patent number: 4021216
    Abstract: A linear array of electron multiplier microchannels is formed by fusing a plurality of solid core glass fibers into a rectangular array. A number of arrays is then sandwiched between a pair of glass plate support members fused into a linear arrangement followed by treating to form the electron multiplier. Treatment comprises subjecting the arrangement to an acid etch for removing the core material and hydrogen firing to activate the core walls for secondary electron emission. The apparatus finds application as an ion-electron converter in focal plane mass spectrometers where high electron gain is required.
    Type: Grant
    Filed: October 24, 1975
    Date of Patent: May 3, 1977
    Assignee: International Telephone and Telegraph Corporation
    Inventors: Adolf R. Asam, John T. Balkwill