Patents by Inventor John A. Severson
John A. Severson 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).
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Patent number: 8348501Abstract: A sensor for detecting icing conditions in an airstream includes a flow housing mounted on an aircraft and in which one or more probes are mounted. At least one of the probes subjected to impingement of the airstream and liquid moisture droplets in such airstream. The heat removal, or cooling effect on the probe in the airstream carrying liquid droplets is determined. A temperature signal indicating the airstream temperature is combined with signals from the at least one probe for determining whether or not icing conditions are present.Type: GrantFiled: July 28, 2011Date of Patent: January 8, 2013Assignee: Rosemount Aerospace, Inc.Inventor: John A. Severson
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Patent number: 8182140Abstract: A sensor for detecting icing conditions in an airstream includes a flow housing mounted on an aircraft and in which one or more probes are mounted. At least one of the probes subjected to impingement of the airstream and liquid moisture droplets in such airstream. The heat removal, or cooling effect on the probe in the airstream carrying liquid droplets is determined. A temperature signal indicating the airstream temperature is combined with signals from the at least one probe for determining whether or not icing conditions are present.Type: GrantFiled: January 21, 2010Date of Patent: May 22, 2012Assignee: Rosemount Aerospace, Inc.Inventor: John A. Severson
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Publication number: 20110282595Abstract: A sensor for detecting icing conditions in an airstream includes a flow housing mounted on an aircraft and in which one or more probes are mounted. At least one of the probes subjected to impingement of the airstream and liquid moisture droplets in such airstream. The heat removal, or cooling effect on the probe in the airstream carrying liquid droplets is determined. A temperature signal indicating the airstream temperature is combined with signals from the at least one probe for determining whether or not icing conditions are present.Type: ApplicationFiled: July 28, 2011Publication date: November 17, 2011Applicant: Rosemount Aerospace, Inc.Inventor: John A. Severson
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Publication number: 20100116047Abstract: A sensor for detecting icing conditions in an airstream includes a flow housing mounted on an aircraft and in which one or more probes are mounted. At least one of the probes subjected to impingement of the airstream and liquid moisture droplets in such airstream. The heat removal, or cooling effect on the probe in the airstream carrying liquid droplets is determined. A temperature signal indicating the airstream temperature is combined with signals from the at least one probe for determining whether or not icing conditions are present.Type: ApplicationFiled: January 21, 2010Publication date: May 13, 2010Applicant: Rosemount Aerospace, Inc.Inventor: John A. Severson
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Patent number: 7674036Abstract: A sensor for detecting icing conditions in an airstream includes a flow housing mounted on an aircraft and in which one or more probes are mounted. At least one of the probes subjected to impingement of the airstream and liquid moisture droplets in such airstream. The heat removal, or cooling effect on the probe in the airstream carrying liquid droplets is determined. A temperature signal indicating the airstream temperature is combined with signals from the at least one probe for determining whether or not icing conditions are present.Type: GrantFiled: July 17, 2008Date of Patent: March 9, 2010Assignee: Rosemount Aerospace, Inc.Inventor: John A. Severson
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Publication number: 20090003408Abstract: A sensor for detecting icing conditions in an airstream includes a flow housing mounted on an aircraft and in which one or more probes are mounted. At least one of the probes subjected to impingement of the airstream and liquid moisture droplets in such airstream. The heat removal, or cooling effect on the probe in the airstream carrying liquid droplets is determined. A temperature signal indicating the airstream temperature is combined with signals from the at least one probe for determining whether or not icing conditions are present.Type: ApplicationFiled: July 17, 2008Publication date: January 1, 2009Applicant: Rosemount Aerospace, Inc.Inventor: John A. Severson
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Patent number: 7416329Abstract: A sensor for detecting icing conditions in an airstream includes a flow housing mounted on an aircraft and in which one or more probes are mounted. At least one of the probes subjected to impingement of the airstream and liquid moisture droplets in such airstream. The heat removal, or cooling effect on the probe in the airstream carrying liquid droplets is determined. A temperature signal indicating the airstream temperature is combined with signals from the at least one probe for determining whether or not icing conditions are present.Type: GrantFiled: December 22, 2005Date of Patent: August 26, 2008Assignee: Rosemount Aerospace Inc.Inventor: John A. Severson
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Publication number: 20060133447Abstract: A sensor for detecting icing conditions in an airstream includes a flow housing mounted on an aircraft and in which one or more probes are mounted. At least one of the probes subjected to impingement of the airstream and liquid moisture droplets in such airstream. The heat removal, or cooling effect on the probe in the airstream carrying liquid droplets is determined. A temperature signal indicating the airstream temperature is combined with signals from the at least one probe for determining whether or not icing conditions are present.Type: ApplicationFiled: December 22, 2005Publication date: June 22, 2006Applicant: Rosemount Aerospace Inc.Inventor: John Severson
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Patent number: 7031871Abstract: A temperature sensor is provided with at least two thermometers or temperature sensing elements that have different recovery factors, and which are in the same airflow. The recovery factors for the respective thermometers are determined for the sensor and stored in a memory of a processor. The temperature measured by each of the thermometers is provided to the processor, and the processor establishes ratios using the recovery factors and measured temperatures to determine total temperature and static temperature of the airflow in which the thermometers are placed.Type: GrantFiled: June 4, 2004Date of Patent: April 18, 2006Assignee: Rosemount Aerospace, Inc.Inventors: John A. Severson, Kenneth J. Freeman, Dennis J. Cronin
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Patent number: 7014357Abstract: A sensor for detecting icing conditions in an airstream includes a flow housing mounted on an aircraft and in which one or more probes are mounted. At least one of the probes subjected to impingement of the airstream and liquid moisture droplets in such airstream. The heat removal, or cooling effect on the probe in the airstream carrying liquid droplets is determined. A temperature signal indicating the airstream temperature is combined with signals from the at least one probe for determining whether or not icing conditions are present.Type: GrantFiled: November 19, 2002Date of Patent: March 21, 2006Assignee: Rosemount Aerospace Inc.Inventor: John A. Severson
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Patent number: 6974250Abstract: The present invention relates to providing a temperature sensor that is mountable on an aircraft and includes a thermometer or temperature sensing element for sensing temperature of airflow. A heater is provided on the probe to bias the temperature sensed by the thermometer or temperature sensing element, in a manner such that the temperature measured is at a substantially known offset from the static temperature surrounding the temperature sensor. Control of the offset can be achieved by regulating airflow or heat provided. The heating effect is controlled to be a substantially equal and opposite match to the decreased total temperature resulting from lower airspeed or decreased airflow. In this manner, the thermometer or temperature sensing element will essentially operate at a fixed offset above static temperature, that is the temperature in undisturbed air in which the aircraft is operating, over a fairly wide range of flow rates.Type: GrantFiled: April 15, 2004Date of Patent: December 13, 2005Assignee: Rosemount Aerospace Inc.Inventor: John A. Severson
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Publication number: 20050273292Abstract: A temperature sensor is provided with at least two thermometers or temperature sensing elements that have different recovery factors, and which are in the same airflow. The recovery factors for the respective thermometers are determined for the sensor and stored in a memory of a processor. The temperature measured by each of the thermometers is provided to the processor, and the processor establishes ratios using the recovery factors and measured temperatures to determine total temperature and static temperature of the airflow in which the thermometers are placed.Type: ApplicationFiled: June 4, 2004Publication date: December 8, 2005Applicant: Rosemount Aerospace Inc.Inventors: John Severson, Kenneth Freeman, Dennis Cronin
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Publication number: 20050230553Abstract: An ice detector for providing a signal indicating ice formation includes a longitudinally extending probe protruding into an airflow. One or more surface roughness features on surfaces of the probe improve ice detection. Surface roughness features on the probe include ice accreting edges at a distal end of the probe and features arranged on a side surface of the probe which cause the airflow to increase in turbulence.Type: ApplicationFiled: March 31, 2004Publication date: October 20, 2005Applicant: Rosemount Aerospace Inc.Inventors: John Otto, Joseph Fanska, Kenneth Schram, John Severson, David Owens, Dennis Cronin
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Publication number: 20050232331Abstract: The present invention relates to providing a temperature sensor that is mountable on an aircraft and includes a thermometer or temperature sensing element for sensing temperature of airflow. A heater is provided on the probe to bias the temperature sensed by the thermometer or temperature sensing element, in a manner such that the temperature measured is at a substantially known offset from the static temperature surrounding the temperature sensor. Control of the offset can be achieved by regulating airflow or heat provided. The heating effect is controlled to be a substantially equal and opposite match to the decreased total temperature resulting from lower airspeed or decreased airflow. In this manner, the thermometer or temperature sensing element will essentially operate at a fixed offset above static temperature, that is the temperature in undisturbed air in which the aircraft is operating, over a fairly wide range of flow rates.Type: ApplicationFiled: April 15, 2004Publication date: October 20, 2005Applicant: Rosemount Aerospace Inc.Inventor: John Severson
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Publication number: 20050218268Abstract: An ice detector for providing a signal indicating ice formation includes a probe protruding into an airflow. The probe extends into the airflow from a strut. The strut has one or more features which allow the probe to accrete ice at a higher temperature than would conventionally be possible. Strut features can include a notch formed therein in an upwind direction relative to the probe, and a curved surface adjacent a point of extension of the probe from the strut.Type: ApplicationFiled: March 31, 2004Publication date: October 6, 2005Applicant: Rosemount Aerospace Inc.Inventors: John Otto, Joseph Fanska, Kenneth Schram, John Severson, David Owens, Dennis Cronin
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Publication number: 20050146759Abstract: The image scanning system (52) of the present invention scans slides and film strips containing photographic images and creates a corresponding plurality of digital representations of the photographic images. The system (52) includes a touch screen monitor (96), a computer (54), a scanner (62), a high speed interface (112) and a printer (98). The scanner (62) includes a light source (172) for projecting light through the film strip. A light sensor (124) senses the light projected through the film strip and generates pixel data. A film drive advances the film strip between the light source (172) and the light sensor (124). A lens located between the light source and the light sensor directs the light projected through the film strip onto the light sensor (124). The pixel data is transmitted through the high speed interface (112) to the computer (54) for processing operations. After the pixel data has been processed, digital images are displayed on the monitor (96) and may also be printed out.Type: ApplicationFiled: March 8, 2005Publication date: July 7, 2005Inventors: James Truc, Gregg Ovsak, Calvin Wright, Peter Wolter, Richard Lundeen, Douglas Knight, James Anderson, Dennis Deutsch, John Severson
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Patent number: 6847903Abstract: Ice accretion on a probe is detected by determining the change of frequency of a vibrating type ice detector or sensor as ice starts to build up. The rate of change of frequency is determined and is combined with parameters including air velocity and air temperature for providing a signal that indicates liquid water content in the airflow as well as ice accretion on the ice detector.Type: GrantFiled: March 28, 2003Date of Patent: January 25, 2005Assignee: Rosemount Aerospace Inc.Inventors: John A. Severson, Kenneth J. Schram
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Patent number: 6759962Abstract: An ice detector has a pair of probes, each of which is used for determining the accretion of ice thereon. One of the probes in the assembly is configured so the smaller droplets of supercoooled water are inertially separated and flow away from the one probe. The ice accretion on the one probe is primarily from large (50 microns or greater) supercooled droplets. The ice accreting on the one probe is therefore biased to supercooled large droplets. The probes are connected to detection circuitry that will determine the ratio of the rates of icing between the probes so the presence of supercooled large droplets can be determined. In one form, a flow guide is arranged to create an airflow that carries smaller droplets past one of the probes without impinging on the probe, but the higher inertia, supercooled large droplets will impinge on that one probe.Type: GrantFiled: September 4, 2001Date of Patent: July 6, 2004Assignee: Rosemount Aerospace Inc.Inventors: John A. Severson, Bruce B. Chenoweth, Robert D. Rutkiewicz
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Publication number: 20040095984Abstract: A sensor for detecting icing conditions in an airstream includes a flow housing mounted on an aircraft and in which one or more probes are mounted. At least one of the probes subjected to impingement of the airstream and liquid moisture droplets in such airstream. The heat removal, or cooling effect on the probe in the airstream carrying liquid droplets is determined. A temperature signal indicating the airstream temperature is combined with signals from the at least one probe for determining whether or not icing conditions are present.Type: ApplicationFiled: November 19, 2002Publication date: May 20, 2004Inventor: John A. Severson
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Publication number: 20040024538Abstract: Ice accretion on a probe is detected with various ice detectors to provide a signal indicating the rate of ice accretion. The rate of change of ice accretion is determined and is combined with parameters including air velocity, air pressure and air temperature for providing a signal that indicates liquid water content in the airflow, as well as ice accretion on the ice detector.Type: ApplicationFiled: July 28, 2003Publication date: February 5, 2004Applicant: Rosemount Aerospace Inc.Inventors: John A. Severson, Kenneth J. Schram