Patents by Inventor Jeffrey N. Parks
Jeffrey N. Parks 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: 7458166Abstract: The compass system of the present invention utilizes an improved calibration route in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (?A/2, ?B/2).Type: GrantFiled: January 29, 2008Date of Patent: December 2, 2008Assignee: Johnson Controls Technology CompanyInventors: Jeffrey N. Parks, Thomas R. Olson, David J. Slater
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Patent number: 7353614Abstract: The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (?A/2, ?B/2).Type: GrantFiled: February 22, 2007Date of Patent: April 8, 2008Assignee: Johnson Controls Technology CompanyInventors: Jeffrey N. Parks, Thomas R. Olson, David J. Slater
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Patent number: 7191533Abstract: The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (?A/2, ?B/2).Type: GrantFiled: August 29, 2006Date of Patent: March 20, 2007Assignee: Johnson Controls Technology CompanyInventors: Jeffrey N. Parks, Thomas R. Olson, David J. Slater
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Patent number: 7127823Abstract: The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (?A/2, ?B/2).Type: GrantFiled: November 10, 2005Date of Patent: October 31, 2006Assignee: Johnson Controls Technology CompanyInventors: Jeffrey N. Parks, Thomas R. Olson, David J. Slater
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Patent number: 6964108Abstract: The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (?A/2, ?B/2).Type: GrantFiled: December 1, 2004Date of Patent: November 15, 2005Assignee: Johnson Controls Technology CompanyInventors: Jeffrey N. Parks, Thomas R. Olson, David J. Slater
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Patent number: 6857194Abstract: The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (?A/2, ?B/2).Type: GrantFiled: September 16, 2003Date of Patent: February 22, 2005Assignee: Johnson Controls Technology CompanyInventors: Jeffrey N. Parks, Thomas R. Olson, David J. Slater
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Publication number: 20040123475Abstract: The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (−A/2, −B/2).Type: ApplicationFiled: September 16, 2003Publication date: July 1, 2004Applicant: Johnson Controls Technology CompanyInventors: Jeffrey N. Parks, Thomas R. Olson, David J. Slater
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Patent number: 6643941Abstract: The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation 2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (−A/2, −B/2).Type: GrantFiled: July 24, 2001Date of Patent: November 11, 2003Assignee: Johnson Controls Technology CompanyInventors: Jeffrey N. Parks, Thomas R. Olson, David J. Slater
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Publication number: 20020035791Abstract: The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation X2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x ,y) for the three data points and defining the center point as (−A/2, −B/2).Type: ApplicationFiled: July 24, 2001Publication date: March 28, 2002Inventors: Jeffrey N. Parks, Thomas R. Olson, David J. Slater
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Patent number: 6301794Abstract: The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (−A/2, −B/2).Type: GrantFiled: May 27, 1999Date of Patent: October 16, 2001Assignee: Johnson Controls, Inc.Inventors: Jeffrey N. Parks, Thomas R. Olson, David J. Slater
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Patent number: 5737226Abstract: An electrical system providing automatic calibration of a vehicle compass for abrupt and significant changes in vehicle magnetism. The system includes a magnetic field sensor providing signal information representing the magnetic field sensed within the vehicle. Coupled to the sensor is an electrical circuit for processing the signal information from the sensor to determine if a shift in vehicle magnetism has occurred and for calculating compensation signal information to provide a corrected heading display.Type: GrantFiled: June 5, 1995Date of Patent: April 7, 1998Assignee: Prince CorporationInventors: Thomas R. Olson, Jeffrey N. Parks, Paul S. VanLente