Patents by Inventor Keith Pratt

Keith Pratt 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: 20210285635
    Abstract: An outdoor decorative burner having a direct gas feed and a linear burner having a plurality of longitudinally-oriented slit-like flame orifices. The linear burner is securely attached to a plate by at least two wrap brackets. A direct spark igniter and a flame sensor are included and surrounded by protective cages.
    Type: Application
    Filed: June 1, 2021
    Publication date: September 16, 2021
    Inventors: Taylor James Moore, Dylan Garrett Pratt, Jacob Keith Moss
  • Publication number: 20210262998
    Abstract: A gas detection apparatus and method for measuring humidity using an electrochemical gas sensor. The gas detection apparatus comprises an electrolyte-based electrochemical gas sensor and a controller configured to measure the average humidity value within an ambient environment over a period of time. The average ambient humidity value over the period of time is determined based on the average rate of change over the period of time of the electrolyte concentration within the electrolyte gas sensor of the gas detection apparatus over the period and the average temperature in the ambient environment over the period of time. The gas sensing apparatus may be configured to communicate the average ambient humidity value within the ambient environment to a second electrochemical gas sensor or a second gas detection apparatus within the same ambient environment.
    Type: Application
    Filed: May 10, 2021
    Publication date: August 26, 2021
    Inventors: Keith PRATT, Tom GURD
  • Patent number: 11029294
    Abstract: A gas detection apparatus and method for measuring humidity using an electrochemical gas sensor. The gas detection apparatus comprises an electrolyte-based electrochemical gas sensor and a controller configured to measure the average humidity value within an ambient environment over a period of time. The average ambient humidity value over the period of time is determined based on the average rate of change over the period of time of the electrolyte concentration within the electrolyte gas sensor of the gas detection apparatus over the period and the average temperature in the ambient environment over the period of time. The gas sensing apparatus may be configured to communicate the average ambient humidity value within the ambient environment to a second electrochemical gas sensor or a second gas detection apparatus within the same ambient environment.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: June 8, 2021
    Assignee: Honeywell International Inc.
    Inventors: Keith Pratt, Tom Gurd
  • Publication number: 20200319155
    Abstract: A gas detection apparatus and method for measuring humidity using an electrochemical gas sensor. The gas detection apparatus comprises an electrolyte-based electrochemical gas sensor and a controller configured to measure the average humidity value within an ambient environment over a period of time. The average ambient humidity value over the period of time is determined based on the average rate of change over the period of time of the electrolyte concentration within the electrolyte gas sensor of the gas detection apparatus over the period and the average temperature in the ambient environment over the period of time. The gas sensing apparatus may be configured to communicate the average ambient humidity value within the ambient environment to a second electrochemical gas sensor or a second gas detection apparatus within the same ambient environment.
    Type: Application
    Filed: April 5, 2019
    Publication date: October 8, 2020
    Inventors: Keith Pratt, Tom Gurd
  • Publication number: 20090127134
    Abstract: A method of determining information about a gas sample includes: causing bulk flow of the gas sample in an airstream along at least one flow channel such that all or a significant fraction of the gas sample is consumed on at least one adjacent sensing electrode whereby one or more electrolytic currents are generated, and monitoring at least one electrolytic current so as to determine information about the gas sample.
    Type: Application
    Filed: December 20, 2007
    Publication date: May 21, 2009
    Inventors: Keith Pratt, Andrew T. Yardley, Terence N. Moran
  • Publication number: 20090126454
    Abstract: A method for determining the concentration of a target gas in an environment which utilises a metal oxide gas sensor having a sensitivity to a background stimulus present in the environment, said sensitivity being variable according to the concentration of the target gas, comprises the following steps: (1) calibrating the sensitivity of the first sensor to the background stimulus as a function of the concentration of the target gas; (2) determining a change in the sensitivity of the first sensor to the background stimulus in the environment, caused by the presence of the target gas in the environment; and (3) using the change in sensitivity to the background stimulus determined in step (2) and the step of calibrating the sensitivity of the first sensor in step (1) to determine the concentration of the target gas in the environment.
    Type: Application
    Filed: December 12, 2007
    Publication date: May 21, 2009
    Inventors: Keith Pratt, Peter Smith
  • Publication number: 20060114115
    Abstract: A method of detecting a predetermined alarm condition in a combustion emission gas. The method comprises exposing to the gas a semiconductor gas sensor having a p-type mixed metal oxide semiconducting material of the first, second and/or third order transition metal series, the semiconducting material being responsive both to a change in concentration of a reducing gas in the surrounding atmosphere and to a change in concentration of oxygen in the surrounding atmosphere to exhibit a change in its electrical resistance. The resistance is monitored and an alarm signal is output if the resistance exceeds a predetermined value corresponding to the alarm condition.
    Type: Application
    Filed: October 8, 2003
    Publication date: June 1, 2006
    Inventors: Peter Smith, Keith Pratt
  • Patent number: 5054316
    Abstract: The present invention provides for an acoustical volumetric measuring apparatus which utilizes a variable volume standard cavity. The variable volume standard cavity is preferably formed of a threaded two-piece cylinder which changes volume upon rotation of one piece relative to other. Further, the variable volume standard cavity is calibrated to externally display the current volume setting. This allows for simplified comparisons in determining the volume of an unknown cavity. The simplified comparisons allow for less expensive components to be utilized.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: October 8, 1991
    Inventors: Keith Pratt, Duane D. Muelling