Patents by Inventor Philippe Darbon

Philippe Darbon 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 of detecting whether at least one die is centered about a thread held taught between two fixed points
    Patent number: 5617210
    Abstract: The present invention relates to a method of detecting whether at least one die is centered about a thread held taught between two fixed points separated by a distance L, wherein:the thread is excited into vibration;its frequency F of vibration is measured;the corresponding length 1 of vibrating chord between one of said fixed points referred to as a "reference" fixed point and another point referred to as a "contact" point is deduced therefrom; andlength l is compared with length L and with the length of the segment of thread between said reference fixed point and said die, so as to deduce therefrom:either that the thread is touching said die, if length l corresponds to the length of the segment, said contact point then being situated at said die;or else that the thread is not touching said die, if length l is equal to the length L between said two fixed points, in which case said die is properly centered, said contact point then coinciding with the other one of said fixed points.
    Type: Grant
    Filed: October 13, 1995
    Date of Patent: April 1, 1997
    Assignee: Alcatel Fibers Optques
    Inventors: Philippe Darbon, Bernard Floch, Max Matau
  • Method and device for manufacturing an optical fiber
    Patent number: 5545246
    Abstract: A method for manufacturing an optical fiber (11), wherein the fiber (11) is drawn from one end of a preform (9) which is heated to above the glass softening temperature. The preform (9) is surronded by a protective gas (14) whose flow direction corresponds to the fiber drawing direction. The flow of the gas surrounding the preform (9) in the drawing area (10) is stabilized by an additional flushing gas (16).
    Type: Grant
    Filed: November 8, 1994
    Date of Patent: August 13, 1996
    Assignee: Kabel Rheydt Aktiengesellschaft
    Inventors: Hans-J urgen Lysson, Frank Lisse, Manuela Hahn, Hans-Detlef Leppert, Philippe Darbon
  • Method of limiting coupling losses between monomode optical fibers using a piece of multimode optical fiber
    Patent number: 5337380
    Abstract: The present invention relates to a method of limiting coupling losses between a monomode optical fiber (2) having a mode diameter of W.sub.o, and an optical system (1) having a mode diameter W'.sub.o that is different from W.sub.o, said method being characterized by the fact that a piece (4) of multimode fiber is welded onto the end of said monomode fiber, said piece of multimode fiber having a length in the range 0.1 mm to 5 mm, and having the same cladding outside diameter as said monomode fiber, a mode diameter substantially equal to W'.sub.o, and an index difference .delta.n lying in the range 5.times.10.sup.-3 to 50.times.10.sup.-3, the weld creating an adiabatic cone in the region where the cores meet.
    Type: Grant
    Filed: September 15, 1992
    Date of Patent: August 9, 1994
    Assignee: Alcatel N.V.
    Inventors: Philippe Darbon, Emmanuel Grard