Patents by Inventor John R. Dunham

John R. Dunham 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: 8920195
    Abstract: An electrical connector provides shielded signal pathways. The electrical connector includes a shield plate, a first finger that extends from an edge of the shield plate, and a second finger that extends from the edged of the shield and that is adjacent to the first finger. A channel is formed between the first finger and the second finger. A coupling is placed within the channel adjacent the first finger. The coupling includes a contact, a first connecting arm extending from a first end of the contact to a first portion of the first finger, and a second connecting arm extending from a second end of the contact to a second portion of the first finger. The first connecting arm and the second connecting arm provide at least two current paths from the contact to the first finger.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: December 30, 2014
    Assignee: Amphenol Corporation
    Inventors: Thomas S. Cohen, Brian Peter Kirk, John R. Dunham
  • Patent number: 8298015
    Abstract: An electrical connector provides shielded signal pathways. The electrical connector includes a shield plate, a first finger that extends from an edge of the shield plate, and a second finger that extends from the edged of the shield and that is adjacent to the first finger. A channel is formed between the first finger and the second finger. A coupling is placed within the channel adjacent the first finger. The coupling includes a contact, a first connecting arm extending from a first end of the contact to a first portion of the first finger, and a second connecting arm extending from a second end of the contact to a second portion of the first finger. The first connecting arm and the second connecting arm provide at least two current paths from the contact to the first finger.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: October 30, 2012
    Assignee: Amphenol Corporation
    Inventors: Thomas S. Cohen, Brian P. Kirk, John R. Dunham
  • Patent number: 8202118
    Abstract: A differential connector has a plurality of rows. Each row includes a plurality of signal conductors provided as differential pairs. Each signal conductor has a first contact end connectable to a printed circuit board, a second contact end, and an intermediate portion having a first width. For each differential pair, one first contact end lies along a first line parallel to the plurality of rows and the other first contact end lies along a second line parallel to and spaced from the first line. The differential connector further includes a plurality of ground conductors, with each ground conductor corresponding to a differential pair. Each ground conductor has a first contact end connectable to the printed circuit board, a second contact end, and an intermediate portion having a second width that is at least twice the first width.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: June 19, 2012
    Assignee: Amphenol Corporation
    Inventors: Thomas S. Cohen, Mark W. Gailus, John R. Dunham
  • Publication number: 20110130038
    Abstract: A differential connector has a plurality of rows. Each row includes a plurality of signal conductors provided as differential pairs. Each signal conductor has a first contact end connectable to a printed circuit board, a second contact end, and an intermediate portion having a first width. For each differential pair, one first contact end lies along a first line parallel to the plurality of rows and the other first contact end lies along a second line parallel to and spaced from the first line. The differential connector further includes a plurality of ground conductors, with each ground conductor corresponding to a differential pair. Each ground conductor has a first contact end connectable to the printed circuit board, a second contact end, and an intermediate portion having a second width that is at least twice the first width.
    Type: Application
    Filed: September 27, 2010
    Publication date: June 2, 2011
    Inventors: Thomas S. Cohen, Mark W. Gailus, John R. Dunham
  • Patent number: 7811130
    Abstract: A differential connector has a plurality of rows. Each row includes a plurality of signal conductors provided as differential pairs. Each signal conductor has a first contact end connectable to a printed circuit board, a second contact end, and an intermediate portion having a first width. For each differential pair, one first contact end lies along a first line parallel to the plurality of rows and the other first contact end lies along a second line parallel to and spaced from the first line. The differential connector further includes a plurality of ground conductors, with each ground conductor corresponding to a differential pair. Each ground conductor has a first contact end connectable to the printed circuit board, a second contact end, and an intermediate portion having a second width that is at least twice the first width.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: October 12, 2010
    Assignee: Amphenol Corporation
    Inventors: Thomas S. Cohen, Mark W. Gailus, John R. Dunham
  • Publication number: 20100093216
    Abstract: An electrical connector provides shielded signal pathways. The electrical connector includes a shield plate, a first finger that extends from an edge of the shield plate, and a second finger that extends from the edged of the shield and that is adjacent to the first finger. A channel is formed between the first finger and the second finger. A coupling is placed within the channel adjacent the first finger. The coupling includes a contact, a first connecting arm extending from a first end of the contact to a first portion of the first finger, and a second connecting arm extending from a second end of the contact to a second portion of the first finger. The first connecting arm and the second connecting arm provide at least two current paths from the contact to the first finger.
    Type: Application
    Filed: October 10, 2008
    Publication date: April 15, 2010
    Applicant: AMPHENOL CORPORATION
    Inventors: Thomas S. COHEN, Brian P. Kirk, John R. Dunham
  • Patent number: 7544096
    Abstract: A differential connector has a plurality of rows. Each row includes a plurality of signal conductors provided as differential pairs. Each signal conductor has a first contact end connectable to a printed circuit board, a second contact end, and an intermediate portion having a first width. For each differential pair, one first contact end lies along a first line parallel to the plurality of rows and the other first contact end lies along a second line parallel to and spaced from the first line. The differential connector further includes a plurality of ground conductors, with each ground conductor corresponding to a differential pair. Each ground conductor has a first contact end connectable to the printed circuit board, a second contact end, and an intermediate portion having a second width that is at least twice the first width.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: June 9, 2009
    Assignee: Amphenol Corporation
    Inventors: Thomas S. Cohen, Mark W. Gallus, John R. Dunham
  • Patent number: 7278886
    Abstract: A differential connector has a plurality of rows. Each row includes a plurality of signal conductors provided as differential pairs. Each signal conductor has a first contact end connectable to a printed circuit board, a second contact end, and an intermediate portion having a first width. For each differential pair, one first contact end lies along a first line parallel to the plurality of rows and the other first contact end lies along a second line parallel to and spaced from the first line. The differential connector further includes a plurality of ground conductors, with each ground conductor corresponding to a differential pair. Each ground conductor has a first contact end connectable to the printed circuit board, a second contact end, and an intermediate portion having a second width that is at least twice the first width.
    Type: Grant
    Filed: August 14, 2006
    Date of Patent: October 9, 2007
    Assignee: Amphenol Corporation
    Inventors: Thomas S. Cohen, Mark W. Gailus, John R. Dunham
  • Patent number: 7094102
    Abstract: A differential connector has a plurality of rows. Each row includes a plurality of signal conductors provided as differential pairs. Each signal conductor has a first contact end connectable to a printed circuit board, a second contact end, and an intermediate portion having a first width. For each differential pair, one first contact end lies along a first line parallel to the plurality of rows and the other first contact end lies along a second line parallel to and spaced from the first line. The differential connector further includes a plurality of ground conductors, with each ground conductor corresponding to a differential pair. Each ground conductor has a first contact end connectable to the printed circuit board, a second contact end, and an intermediate portion having a second width that is at least twice the first width.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: August 22, 2006
    Assignee: Amphenol Corporation
    Inventors: Thomas S. Cohen, Mark W. Gallus, John R. Dunham
  • Patent number: 7074086
    Abstract: In one embodiment of the invention, there is disclosed an electrical connector connectable to a printed circuit board, the electrical connector having an insulative housing including side walls and a base. The electrical connector also includes signal conductors and ground conductors. Each of the signal conductors and ground conductors has a first contact end connectable to the printed circuit board, a second contact end, and an intermediate portion therebetween that is disposed in the base of the insulative housing. The signal conductors and the ground conductors are arranged in a plurality of rows, with each row having signal conductors and ground conductors. For each of the plurality of rows, there is a corresponding ground strip positioned adjacent thereto disposed in the base of the insulative housing. And the ground strip is electrically connected to the ground conductors of the row.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: July 11, 2006
    Assignee: Amphenol Corporation
    Inventors: Thomas S. Cohen, Marc B. Cartier, John R. Dunham, Jason J. Payne
  • Patent number: 6872085
    Abstract: There is disclosed an electrical connector assembly having a first electrical connector mateable to a second electrical connector. In one embodiment, the first electrical connector includes a plurality of wafers, with each wafer having an insulative housing, a plurality of signal conductors and a shield plate. A portion of the shield plate is exposed so that a conductive member can electrically connect the shield plates of the wafers at the exposed portion of the shield plate. In one embodiment, the second electrical connector includes an insulative housing, and a plurality of signal conductors and ground conductors in a plurality of rows. Each row corresponds to a wafer of the first electrical connector. Each signal conductor has a contact tail and each ground conductors has two contact tails.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: March 29, 2005
    Assignee: Teradyne, Inc.
    Inventors: Thomas S. Cohen, Marc B. Cartier, John R. Dunham, Jason J. Payne
  • Publication number: 20040259419
    Abstract: A shielded electrical connector in which multi-beam contacts are used to improve performance of the connector. The beams are positioned to create multiple current paths through a shield member, thereby increasing the effectiveness of the shield. These contacts are used in a connector that has individual shield strips running in parallel with signal conductors. Multiple contact tails are also used to create multiple current paths. Projections from the shield strips shield adjacent signal contacts and the contact portions are positioned to increase current flow through the projections. Structures to allow beam-type contacts to be formed in a small space are also disclosed. The contact structure also reduces the impedance of the ground path.
    Type: Application
    Filed: June 18, 2003
    Publication date: December 23, 2004
    Inventors: Jason J. Payne, Thomas S. Cohen, John R. Dunham, Mark W. Gailus, Philip T. Stokoe
  • Patent number: 6827611
    Abstract: A shielded electrical connector in which multi-beam contacts are used to improve performance of the connector. The beams are positioned to create multiple current paths through a shield member, thereby increasing the effectiveness of the shield. These contacts are used in a connector that has individual shield strips running in parallel with signal conductors. Multiple contact tails are also used to create multiple current paths. Projections from the shield strips shield adjacent signal contacts and the contact portions are positioned to increase current flow through the projections. Structures to allow beam-type contacts to be formed in a small space are also disclosed. The contact structure also reduces the impedance of the ground path.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: December 7, 2004
    Assignee: Teradyne, Inc.
    Inventors: Jason J. Payne, Thomas S. Cohen, John R. Dunham, Mark W. Gailus, Philip T. Stokoe