Patents Assigned to Qualitrol Company, LLC
  • Patent number: 10309851
    Abstract: A rapid pressure rise detection and management system that detects internal pressure changes in a transformer. The rapid pressure rise detection and management system communicates with one or more pressure sensors attached to a tank of the transformer and measures the rate of pressure change versus time. The rapid pressure rise detection and management system then compares this rate of pressure change against a set of parameters to determine if this pressure change is an internal fault requiring the transformer to be taken offline or external fault to be ignored. This rapid pressure rise detection and management system may be a standalone device or work with other monitoring/controlling equipment to expand its sensing and management capabilities.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: June 4, 2019
    Assignee: Qualitrol Company LLC
    Inventor: John R. Piper
  • Patent number: 9939565
    Abstract: A reflective element for directing an optical signal into a fiber optic sensor having an optical fiber includes a plane containing a sharply defined straight line that separates between a first area of low reflectivity and a second area of high reflectivity. The plane is disposed parallel to a free end surface of the optical fiber so that the free end surface intersects the line of the reflective element, whereby relative movement between the free end surface of the optical fiber and the line in response to a physical change sensed by the fiber optic sensor induces variations in an optical signal reflected by the reflective element through the optical fiber, which variations allow measurement of the physical change.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: April 10, 2018
    Assignee: Qualitrol Company LLC
    Inventors: Yuvi Kahana, Alexander Kots, Alexander Paritsky
  • Patent number: 9046423
    Abstract: In accordance with the present invention, there is provided a hybrid mechanical and electrical transformer temperature monitor. The mechanical sensing mechanism drives mechanical switches, a local display and a sensing input to the electrical side of the monitor. The electrical portion of the temperature monitor has the ability to calculate winding temperature (with an additional current sensor), data log, actuate electrical switches and has a local display for winding temperature.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: June 2, 2015
    Assignee: Qualitrol Company, LLC
    Inventor: John Rolland Piper
  • Patent number: 8871005
    Abstract: A method of regenerating a desiccant in a breather communicating with a vessel includes creating a temperature signal that is a temperature associated with at least one of the vessel and the breather for a plurality of cycles, each cycle having a predetermined duration, and regenerating the desiccant when the second derivative of the temperature signal reaches a peak value.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: October 28, 2014
    Assignee: Qualitrol Company, LLC
    Inventor: Joshua J. Herz
  • Patent number: 8839658
    Abstract: The invention provides a sensor assembly for determining the concentration of hydrogen in an insulating fluid in electric power generation, transmission, and distribution equipment. The assembly includes a housing having an opening therein communicating with the fluid, a hydrogen sensor disposed in the housing and responsive to the concentration of hydrogen in the fluid and generating a signal related to the concentration of hydrogen, and a pressure sensor disposed in the housing responsive to the fluid and generating a second signal indicative of the pressure of the fluid in the equipment. The assembly further includes a signal processor disposed in the housing and connected to the hydrogen sensor and the pressure sensor and responsive to the first and second signals for generating a third signal representing the concentration of hydrogen in the fluid.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: September 23, 2014
    Assignee: Qualitrol Company, LLC
    Inventors: Joshua J. Herz, David Billings
  • Publication number: 20140182452
    Abstract: A method of regenerating a desiccant in a breather communicating with a vessel includes creating a temperature signal that is a temperature associated with at least one of the vessel and the breather for a plurality of cycles, each cycle having a predetermined duration, and regenerating the desiccant when the second derivative of the temperature signal reaches a peak value.
    Type: Application
    Filed: December 31, 2012
    Publication date: July 3, 2014
    Applicant: QUALITROL COMPANY, LLC
    Inventor: Joshua J. Herz
  • Publication number: 20140182209
    Abstract: A port assembly is receivable in an opening allowing access to the interior of a transformer. The port assembly includes a body and a port cover. The body is receivable in the opening and has a substantially axial opening therethrough. The axial opening allows access to the interior of the transformer through the port. The port cover is disposed on the interior of the transformer and is movable relative to the body between a sealed position sealing the axial opening and an open position allowing access to the interior of the temperature well. The port cover is biased toward the sealing position and moves to the open position upon being acted upon by an elongate tool inserted into the temperature well through the axial opening in the port.
    Type: Application
    Filed: December 31, 2012
    Publication date: July 3, 2014
    Applicant: Qualitrol Company, LLC
    Inventor: Joshua J. Herz
  • Patent number: 8707767
    Abstract: A housing sensor having a semiconductor element for measuring hydrogen concentration in an insulating fluid in equipment having a mounting flange on the equipment providing access to the interior of the equipment provided with a plurality of bolt receiving openings arranged on the mounting flange in a first pattern which includes a first flange having at least one or more openings and an outer periphery. The sensor also includes a tubular housing support member having one end received in one of the openings, a plurality of bolt receiving apertures arranged in a pattern corresponding to the first pattern within the outer periphery of the first flange. The sensor further includes at least one wire receiving opening extending through the housing body, a cover closing an end of the housing body distal from the one end, a first seal disposed between the first flange and the tubular housing support member, a second seal disposed on the first flange for engaging the mounting flange.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: April 29, 2014
    Assignee: Qualitrol Company, LLC
    Inventors: Joshua J. Herz, David Billings
  • Publication number: 20140036958
    Abstract: In accordance with the present invention, there is provided a hybrid mechanical and electrical transformer temperature monitor. The mechanical sensing mechanism drives mechanical switches, a local display and a sensing input to the electrical side of the monitor. The electrical portion of the temperature monitor has the ability to calculate winding temperature (with an additional current sensor), data log, actuate electrical switches and has a local display for winding temperature.
    Type: Application
    Filed: August 1, 2012
    Publication date: February 6, 2014
    Applicant: Qualitrol Company, LLC
    Inventor: John Rolland Piper
  • Patent number: 8511160
    Abstract: The invention provides a housing for a sensor having a semiconductor element for measuring hydrogen concentration in an insulating fluid in electric power generation, transmission, and distribution equipment having a mounting flange on the equipment providing access to the interior of the equipment and provided with a plurality of bolt receiving openings arranged on the mounting flange in a first pattern, which includes a first flange having at least one or more openings for receiving one or more semiconductor hydrogen sensors and an outer periphery, a plurality of bolt receiving apertures arranged in a pattern corresponding to the first pattern within the outer periphery of the first flange, a second flange having a second plurality of bolt receiving apertures arranged in a pattern corresponding to the first pattern within the periphery of the second flange.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: August 20, 2013
    Assignee: Qualitrol Company, LLC
    Inventors: Joshua J. Herz, David Billings
  • Publication number: 20120247204
    Abstract: The invention provides a housing for a sensor having a semiconductor element for measuring hydrogen concentration in an insulating fluid in electric power generation, transmission, and distribution equipment having a mounting flange on the equipment providing access to the interior of the equipment and provided with a plurality of bolt receiving openings arranged on the mounting flange in a first pattern, which includes a first flange having at least one or more openings for receiving one or more semiconductor hydrogen sensors and an outer periphery, a plurality of bolt receiving apertures arranged in a pattern corresponding to the first pattern within the outer periphery of the first flange, a second flange having a second plurality of bolt receiving apertures arranged in a pattern corresponding to the first pattern within the periphery of the second flange.
    Type: Application
    Filed: May 25, 2011
    Publication date: October 4, 2012
    Applicant: Qualitrol Company, LLC.
    Inventors: Joshua J. Herz, David Billings
  • Publication number: 20120247185
    Abstract: The invention provides a sensor assembly for determining the concentration of hydrogen in an insulating fluid in electric power generation, transmission, and distribution equipment. The assembly includes a housing having an opening therein communicating with the fluid, a hydrogen sensor disposed in the housing and responsive to the concentration of hydrogen in the fluid and generating a signal related to the concentration of hydrogen, and a pressure sensor disposed in the housing responsive to the fluid and generating a second signal indicative of the pressure of the fluid in the equipment. The assembly further includes a signal processor disposed in the housing and connected to the hydrogen sensor and the pressure sensor and responsive to the first and second signals for generating a third signal representing the concentration of hydrogen in the fluid.
    Type: Application
    Filed: March 31, 2011
    Publication date: October 4, 2012
    Applicant: Qualitrol Company, LLC
    Inventors: Joshua J. Herz, David Billings
  • Publication number: 20120247191
    Abstract: A housing sensor having a semiconductor element for measuring hydrogen concentration in an insulating fluid in equipment having a mounting flange on the equipment providing access to the interior of the equipment provided with a plurality of bolt receiving openings arranged on the mounting flange in a first pattern which includes a first flange having at least one or more openings and an outer periphery. The sensor also includes a tubular housing support member having one end received in one of the openings, a plurality of bolt receiving apertures arranged in a pattern corresponding to the first pattern within the outer periphery of the first flange. The sensor further includes at least one wire receiving opening extending through the housing body, a cover closing an end of the housing body distal from the one end, a first seal disposed between the first flange and the tubular housing support member, a second seal disposed on the first flange for engaging the mounting flange.
    Type: Application
    Filed: March 31, 2011
    Publication date: October 4, 2012
    Applicant: Qualitrol Company, LLC
    Inventors: Joshua J. Herz, David Billings
  • Publication number: 20120247187
    Abstract: The invention provides a sensor assembly for a sensor having a semiconductor element for measuring hydrogen concentration in an insulating fluid in electric power generation, transmission, and distribution equipment having a temperature well that has a tubular portion extending into the equipment providing access to the interior of the equipment, the temperature well having a movable valve at an end of the tubular portion. The tubular portion includes a first flange, a tubular housing member attached to the first flange having one end adapted to be telescopically received in the temperature well. The tubular portion further includes a housing body having one end thereof connected to the tubular housing member having a substantially uniform cross section extending from the tubular housing member wherein at least one wire receiving opening extends through the housing body.
    Type: Application
    Filed: March 31, 2011
    Publication date: October 4, 2012
    Applicant: Qualitrol Company, LLC
    Inventor: Joshua J. Herz
  • Patent number: 8028561
    Abstract: The invention is directed at a method of sensing hydrogen gas in a liquid comprising: providing a measuring device comprising a hydrogen sensing chamber and a palladium hydrogen sensor mounted in contact with said chamber, positioning a hydrogen permeable membrane between the liquid and the hydrogen sensor and creating a headspace, selectively providing air to the sensor headspace, thereby bringing air into contact with said palladium sensor to refresh the palladium, after the palladium sensor is refreshed shutting off air flow to the sensor headspace, bringing liquid into said chamber, allowing hydrogen to pass through the membrane and reach equilibrium, and reading the hydrogen concentration.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: October 4, 2011
    Assignee: Qualitrol Company, LLC
    Inventors: Joshua J. Herz, Wendy Dannels, Robert E. Taylor, Steven E. Mulvaney
  • Publication number: 20100077828
    Abstract: The invention is directed at a method of sensing hydrogen gas in a liquid comprising: providing a measuring device comprising a hydrogen sensing chamber and a palladium hydrogen sensor mounted in contact with said chamber, positioning a hydrogen permeable membrane between the liquid and the hydrogen sensor and creating a headspace, selectively providing air to the sensor headspace, thereby bringing air into contact with said palladium sensor to refresh the palladium, after the palladium sensor is refreshed shutting off air flow to the sensor headspace, bringing liquid into said chamber, allowing hydrogen to pass through the membrane and reach equilibrium, and reading the hydrogen concentration.
    Type: Application
    Filed: September 30, 2008
    Publication date: April 1, 2010
    Applicant: QUALITROL COMPANY, LLC
    Inventors: Joshua J. Herz, Wendy Dannels, Robert E. Taylor, Steven E. Mulvaney