Patents by Inventor Marc A. Gessford

Marc A. Gessford 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).

  • Publication number: 20030199208
    Abstract: A surface mount probe point socket has a housing with base and a socket extending from the base. The base has a length and width sufficient for attaching the housing to a circuit trace using an electrically conductive material while adding minimal inductance and capacitance to the circuit trace. The socket has a height and diameter for supporting a measurement probe in the housing while adding minimal inductance and capacitance to the measurement probe. A probe point contact is disposed in the bore of the socket for receiving a probe point disposed in the end of the measurement probe to secure the probe in the housing. Two surface mount probe point sockets may be joined together with an alignment gage and attached to adjacent circuit traces to produce a surface mount probe point socket system for differential measurement probes.
    Type: Application
    Filed: April 19, 2002
    Publication date: October 23, 2003
    Inventors: Marc A. Gessford, William A. Hagerup, Mark W. Nightingale
  • Patent number: 6614221
    Abstract: A deskew fixture has a multilayer circuit board from which pairs of mirrored signal launch contact extend from both sides of the circuit board. One pair of contacts is coupled to electrical ground and the other pair is connected via equal length, electromagnetically coupled strip lines to a signal source. Probe holders are mounted on the circuit boards to support measurement probes with the probing contacts of the measurement probes coupled to the signal launch contacts. Additional pairs of signal launch contacts may be provided with one pair receiving a positive signal from the signal source and another pair receiving a negative signal via equal length, electromagnetically coupled strip lines from the signal source for deskewing differential measurement probes.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: September 2, 2003
    Assignee: Tektronix, Inc.
    Inventors: Kelly F. Cushing, Mark W. Nightingale, John F. Stoops, John C. Calvin, Marc A. Gessford, Marie Ottum
  • Patent number: 6603297
    Abstract: A probe tip adapter for a measurement probe has at least a first electrically conductive element with a bore at one end and a probing contact formed on the other end. The bore of the electrically conductive element has an electrically conductive elastomer disposed therein having sufficient tensile strength, compression set, hardness, deflection force, elongation and percent recovery for repeatably securing the electrically conductive element to the probing tip of the measurement probe. The probing contact may be configured as a probing tip having a shaft that tapers at one end to a point and as a square pin adapter with a bore formed in the electrically conductive element that receives a spring contact. The probe tip adapter is useable with both single ended and differential measurement probes.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: August 5, 2003
    Assignee: Tektronix, Inc.
    Inventors: Marc A. Gessford, Mark W. Nightingale, Gary W. Reed
  • Patent number: 6600330
    Abstract: A probe head holder for a measurement probe head has a probe head mount and a highly elastic, high hoop strength retention member that flexibly secures the measurement probe head to the probe head holder. The probe head mount has a first surface adapted to receive the measurement probe head and a second surface extending from the first surface having at least a first groove formed therein normal to the first surface. The retention member is positioned around the holder and the probe head with a portion of the retention member being disposed in the groove. The probe head holder may be attached to a probe arm of a probing station.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: July 29, 2003
    Assignee: Tektronix, Inc.
    Inventors: Mark W. Nightingale, Marc A. Gessford
  • Publication number: 20030132744
    Abstract: A probe head holder for a measurement probe head has a probe head mount and a highly elastic, high hoop strength retention member that flexibly secures the measurement probe head to the probe head holder. The probe head mount has a first surface adapted to receive the measurement probe head and a second surface extending from the first surface having at least a first groove formed therein normal to the first surface. The retention member is positioned around the holder and the probe head with a portion of the retention member being disposed in the groove. The probe head holder may be attached to a probe arm of a probing station.
    Type: Application
    Filed: January 11, 2002
    Publication date: July 17, 2003
    Inventors: Mark W. Nightingale, Marc A. Gessford
  • Publication number: 20030128023
    Abstract: A deskew fixture has a multilayer circuit board from which pairs of mirrored signal launch contact extend from both sides of the circuit board. One pair of contacts is coupled to electrical ground and the other pair is connected via equal length, electromagnetically coupled strip lines to a signal source. Probe holders are mounted on the circuit boards to support measurement probes with the probing contacts of the measurement probes coupled to the signal launch contacts. Additional pairs of signal launch contacts may be provided with one pair receiving a positive signal from the signal source and another pair receiving a negative signal via equal length, electromagnetically coupled strip lines from the signal source for deskewing differential measurement probes.
    Type: Application
    Filed: May 17, 2002
    Publication date: July 10, 2003
    Inventors: Kelly F. Cushing, Mark W. Nightingale, John F. Stoops, John C. Calvin, Marc A. Gessford, Marie Ottum
  • Patent number: 6400167
    Abstract: A probe tip adapter for a measurement probe has at least a first electrically conductive element with a bore at one end and a probing contact formed on the other end. The bore of the electrically conductive element has an electrically conductive elastomer disposed therein having sufficient tensile strength, compression set, hardness, deflection force, elongation and percent recovery for repeatably securing the electrically conductive element to the probing tip of the measurement probe. An element holder is positionable on the measurement probe and has a cavity formed in one end for receiving the measurement probe. At least a first bore is formed in the other end of the element holder extending to the cavity and aligned with the probing tip of the measurement probe. The electrically conductive element is positioned in the holder bore such that the probing tip penetrates the elastomer and the probing contact extends from the holder.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: June 4, 2002
    Assignee: Tektronix, Inc.
    Inventors: Marc A. Gessford, Mark W. Nightingale, Gary W. Reed
  • Patent number: 6191594
    Abstract: A probe adapter for coupling probe tip contacts of a electrical measurement probe to leads of a surface mounted integrated circuit IC device has an insulating housing from which extend first and second flexible electrically conductive leads having a pitch geometry compatible with the leads of the IC device. First and second electrical contacts, respectively coupled to the first and second flexible electrically conductive leads, are disposed in the housing and have a pitch geometry compatible with the probe tip contacts of the electrical measurement probe.
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: February 20, 2001
    Assignee: Tektronix, Inc.
    Inventors: Mark W. Nightingale, Marc A. Gessford, Richard J. Huard