Patents by Inventor John F. Bridge

John F. Bridge 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).

  • Method and apparatus for centering two concentric cylinders
    Patent number: 4231823
    Abstract: A method and apparatus for centering two concentric cylinders having different diameters is the subject of the present invention. A linear reference line is projected from an illuminating source along the length of the inner cylinder. At the other end of the cylinder is a photo receiver operable to provide a displacement reading related to the amount of light striking the receiver. As the inner cylinder is rotated about its center point, the amount of light striking the photo receiver varies based on the amount of arcuate displacement present at each point of the cylinder. The photo receiver then converts the incoming light into a displacement reading related to the arcuate displacement of the inner cylinder. The readings thus obtained are correlated with the points on the inner cylinder where they occurred to indicate the point and amount of maximum arcuate displacement. Thereafter, the outer cylinder is arcuately displaced a corresponding amount so that it will conform to the inner cylinder exactly.
    Type: Grant
    Filed: December 13, 1978
    Date of Patent: November 4, 1980
    Assignee: H. C. Price Co.
    Inventors: Milburn L. Hart, John F. Bridge
  • Method and apparatus for centering two concentric cylinders
    Patent number: 4141130
    Abstract: A method and apparatus for centering two concentric cylinders having different diameters is the subject of the present invention. A linear reference line is projected from an illuminating source along the length of the inner cylinder. At the other end of the cylinder is a photo receiver operable to provide a displacement reading related to the amount of light striking the receiver. As the inner cylinder is rotated about its center point, the amount of light striking the photo receiver varies based on the amount of arcuate displacement present at each point of the cylinder. The photo receiver then converts the incoming light into a displacement reading related to the arcuate diplacement of the inner cylinder. The readings thus obtained are correlated with the points on the inner cylinder where they occurred to indicate the point and amount of maximum arcuate displacement. Thereafter, the outer cylinder is arcuately displaced a corresponding amount so that it will conform to the inner cylinder exactly.
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: February 27, 1979
    Assignee: H. C. Price Co.
    Inventors: Milburn L. Hart, John F. Bridge