Patents by Inventor Richard T. Kraetsch

Richard T. Kraetsch 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).

  • Optical fiber switch
    Patent number: 5000532
    Abstract: A precisely aligned optical fiber switch assembly. A base member has a vee groove for supporting a fixed optical fiber and a second optical fiber in optical alignment with the fixed fiber. The groove contains sections of different dimensions that receive and align sheathed portions of the fibers and groove sections that receive and align unsheathed portions of the fibers. First aligning means on the base member longitudinally position the fixed and second fibers in the groove. Covering means mate with the base member for covering at least part of the sheathed portions of the fibers. Aligning means position the covering means precisely with respect to the base member.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: March 19, 1991
    Assignee: AT&T Bell Laboratories
    Inventors: Richard T. Kraetsch, Richard J. Pimpinella, Leonard W. Schaper, King L. Tai
  • Optical fiber connector
    Patent number: 4973126
    Abstract: A fiber optical end connector is disclosed, comprising a grooved base member having mounted thereupon a grooved silicon block, and means for holding optical fibers in the grooves on the base member and on the silicon block.
    Type: Grant
    Filed: December 7, 1989
    Date of Patent: November 27, 1990
    Assignee: AT&T Bell Laboratories
    Inventors: Yinon Degani, Robert M. Kimball, Richard T. Kraetsch, Robert M. Lien
  • Movable fiber optical switch
    Patent number: 4946236
    Abstract: An m-input/n-output (e.g., 2.times.2) optical fiber switch is disclosed which alters the location of the fibers by the application of an external force. Illustratively, the switch uses a housing with a diamond-shaped opening extending therethrough, with pairs of optical fibers positioned in orthogonally located V-grooves. Upon the application of an external force, the fibers are moved into the remaining, vacant V-grooves formed by the diamond-shaped opening. In a preferred embodiment, a (2.times.2) switch is magnetically activated.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: August 7, 1990
    Assignee: AT&T Bell Laboratories
    Inventors: Mindaugas F. Dautartas, Yinon Degani, Richard T. Kraetsch, Richard J. Pimpinella, King L. Tai
  • Optical fiber switch
    Patent number: 4896937
    Abstract: A precisely aligned optical fiber switch assembly. A base member has a vee groove for supporting a fixed optical fiber and a second optical fiber in optical alignment with the fixed fiber. The groove contains sections of different dimensions that receive and align sheathed portions of the fibers and groove sections that receive and align unsheathed portions of the fibers. First aligning means on the base member longitudinally position the fixed and second fibers in the groove. Covering means mate with the base member for covering at least part of the sheathed portions of the fibers. Aligning means position the covering means precisely with respect to the base member.
    Type: Grant
    Filed: August 2, 1988
    Date of Patent: January 30, 1990
    Assignee: American Telephone and Telegraph Company, AT&T Bell Laboratories
    Inventors: Richard T. Kraetsch, Richard J. Pimpinella, Leonard W. Schaper, King L. Tai