Patents by Inventor David Edward Welsh

David Edward Welsh 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).

  • Patent number: 6792177
    Abstract: The invention provides an optical switch comprising a housing, an input optical fiber, a mirror substrate, an input pivoting mirror, an output optical fiber, a first optical splitter, and a first optical detector. The input optical fiber propagates a light beam and is secured to the housing. The mirror substrate is secured to the housing. The input pivoting mirror is located in a path of the light beam after leaving the input optical fiber. The input pivoting mirror is pivotally secured to the mirror substrate. Pivoting of the mirror relative to the mirror substrate alters an angle with which the light beam is reflected therefrom. The output optical fiber is secured to the housing and has an end through which the light beam enters after being reflected by the input pivoting mirror. The first optical splitter is located in a path of the light beam after leaving the input optical fiber. The first optical splitter splits the light beam into a first propagated portion and a first monitoring portion.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: September 14, 2004
    Assignee: Calient Networks, Inc.
    Inventors: David Edward Welsh, Roger Jonathan Helkey, Adrian Keating, Daniel Jacob Blumenthal, Walter Joseph Fant
  • Publication number: 20020126949
    Abstract: The invention provides an optical switch comprising a housing, an input optical fiber, a mirror substrate, an input pivoting mirror, an output optical fiber, a first optical splitter, and a first optical detector. The input optical fiber propagates a light beam and is secured to the housing. The mirror substrate is secured to the housing. The input pivoting mirror is located in a path of the light beam after leaving the input optical fiber. The input pivoting mirror is pivotally secured to the mirror substrate. Pivoting of the mirror relative to the mirror substrate alters an angle with which the light beam is reflected therefrom. The output optical fiber is secured to the housing and has an end through which the light beam enters after being reflected by the input pivoting mirror. The first optical splitter is located in a path of the light beam after leaving the input optical fiber. The first optical splitter splits the light beam into a first propagated portion and a first monitoring portion.
    Type: Application
    Filed: March 12, 2001
    Publication date: September 12, 2002
    Inventors: David Edward Welsh, Roger Jonathan Helkey, Adrian Keating, Daniel Jacob Blumenthal, Walter Joseph Fant
  • Patent number: 5898807
    Abstract: A connector system that includes a pair of connectors (12, 14, FIG. 4) with optical fiber termini (32, 42), is of relatively low cost while assuring sufficiently precise alignment of corresponding termini to transmit a high proportion of light signals between them. A first of the connectors (12) includes an insert (30) with passages that hold termini comprising ball lenses (74) lying in front of optical fiber tips lying in ferrules (82). The plurality of termini are fixed in position and orientation in the insert, but the insert is moveable forwardly and rearwardly (F1, R1) and is biased forwardly by a spring device (160, 162). As a result, the mating faces (70, 72) of the inserts of the two connectors are resiliently pressed against one another in a connector wherein each termini is fixed in position in its insert.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: April 27, 1999
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventor: David Edward Welsh
  • Patent number: 4033656
    Abstract: An integrated circuit package socket of a "low profile" construction having a built-in anti-wicking feature and arranged to accept leads of varying widths without overstressing.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: July 5, 1977
    Assignee: Zero Manufacturing Company
    Inventors: Eugene G. Freehauf, Gene C. Hollingsworth, David Edward Welsh