Patents Assigned to Coburn Optical Industries
  • Edging apparatus for ophthalmic lens
    Patent number: 4027434
    Abstract: A follower travels the inside contour of a rotating eyeglass frame and the movement caused by changing radii is detected by a linear variable differential transformer and converted into electrical signals which actuate an electrically operated valve. The valve, in turn, controls the movement of a hydraulic cylinder which dictates the positioning of a lens blank to be edged relative to the grinding periphery of an abrading wheel taking into account the position of the lens edge on the abrading surface.
    Type: Grant
    Filed: July 15, 1975
    Date of Patent: June 7, 1977
    Assignee: Coburn Optical Industries, Inc.
    Inventor: Fred A. Haddock
  • Vacuum chuck with sealable cavity
    Patent number: 3994101
    Abstract: Disclosed is a system for blocking an ophthalmic lens blank by means of a vacuum. The lens blank rests on the chuck and forms an air pocket or cavity therebetween which is evacuated by means of a vacuum pump. After evacuation, an elastic plug is inserted in an aperture in the chuck by atmospheric pressure to maintain the vacuum. The lens is disengaged from the chuck by peeling the plug back and thereby releasing the vacuum.
    Type: Grant
    Filed: January 17, 1975
    Date of Patent: November 30, 1976
    Assignee: Coburn Optical Industries, Inc.
    Inventors: Orin W. Coburn, Joe D. Stith
  • Vaccum chuck with sealable cavity
    Patent number: 3971170
    Abstract: Disclosed is a system for blocking an ophthalmic lens blank by means of a vacuum. The lens blank rests on the chuck and forms an air pocket or cavity therebetween which is evacuated by means of a vacuum pump. After evacuation, an elastic plug is inserted in an aperture in the chuck by atmospheric pressure to maintain the vacuum. The lens is disengaged from the chuck by peeling the plug back and thereby releasing the vacuum.
    Type: Grant
    Filed: January 17, 1975
    Date of Patent: July 27, 1976
    Assignee: Coburn Optical Industries, Inc.
    Inventors: Orin W. Coburn, Joe D. Stith