Patents by Inventor David Claxton
David Claxton 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: 8744741Abstract: A Light Detection and Ranging (LIDAR) apparatus and method are disclosed having a rotatable light source enabled to emit a light ray, the light ray being emitted at a plurality of angular intervals; a reflection device, which can be parabolic in shape, and an analysis device for calculating a position at which one or more features are present based on the angle that the light ray was emitted and the time delay associated with the received reflected light, from a feature, wherein the analysis device takes into account the reflection of the light ray from the reflection device. In this manner, light rays may be reflected from heading in one direction to improve the resolution of the LIDAR in a second direction. Furthermore, where a parabolic reflector is used, positions of features can be calculated directly in a Cartesian coordinate system. Autonomous vehicles can use a LIDAR such as described herein to improve forward looking resolution in collision avoidance systems or terrain selection systems.Type: GrantFiled: April 17, 2009Date of Patent: June 3, 2014Assignee: BAE Systems PLCInventors: Richard Arthur Brimble, Christopher David Claxton
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Patent number: 8706676Abstract: The method includes receiving a plurality of target observations from a respective plurality of sensors and using the target observations to compute target state estimates. Each of the target state estimates is assessed to check if it suffers from one of a set of modelled possible fault types. The target state estimates are adjusted to compensate for any modelled fault type when it is assessed to be suffering from that fault type. A reliability value is computed for each of the target state estimates and the target state estimates are fused together based on the computed reliability values to produce a fused target state estimate.Type: GrantFiled: June 22, 2010Date of Patent: April 22, 2014Assignee: BAE Systems PLCInventors: Christopher David Claxton, David Nicholson, Steven Reece, Stephen John Roberts
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Patent number: 8610775Abstract: A method of estimating states of a plurality of targets tracked by a plurality of sensors. The method includes obtaining a plurality of data sets based on measurements taken by a plurality of sensors, each data set including information on states of a plurality of targets. The method then generates a plurality of target correlation data sets describing correlation of the targets within a first data set and at least one other data set. A Generalised Covariance Union (GCU) technique is used to merge at least some of the plurality of target correlation data sets to generate an estimate of the states of the plurality of targets.Type: GrantFiled: July 30, 2009Date of Patent: December 17, 2013Assignee: BAE Systems PLCInventors: Christopher David Claxton, David Nicholson, Steven Reece, Stephen John Roberts
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Publication number: 20120089554Abstract: The method includes receiving a plurality of target observations from a respective plurality of sensors and using the target observations to compute target state estimates. Each of the target state estimates is assessed to check if it suffers from one of a set of modelled possible fault types. The target state estimates are adjusted to compensate for any modelled fault type when it is assessed to be suffering from that fault type. A reliability value is computed for each of the target state estimates and the target state estimates are fused together based on the computed reliability values to produce a fused target state estimate.Type: ApplicationFiled: June 22, 2010Publication date: April 12, 2012Applicant: BAE SYSTEMS plcInventors: Christopher David Claxton, David Nicholson, Steven Reece, Stephen John Roberts
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Patent number: 8070463Abstract: This invention relates generally to a pneumatic, hydraulic or other media driver, rotating-reciprocating cylinder apparatus to be mounted on the proximal end of CNC lathe spindles, vertical or inverted machining centers, hydraulic machining work cells or rotary transfer machines to actuate work holding chucks, work holding fixtures, clamping apparatus or work supports on the distal end of said spindles. More specifically, this invention relates to an actuating system with the capability of boosting the input hydraulic pressure to the holding device by a pre-set multiple up to 5000 psi where the boost pump is integral to and rotates with the clamp cylinder assembly.Type: GrantFiled: August 14, 2009Date of Patent: December 6, 2011Inventors: Gregory A. Stephens, Alan Claxton, David Claxton, Thomas Thompson
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Publication number: 20110169951Abstract: A method of estimating states of a plurality of targets tracked by a plurality of sensors. The method includes obtaining a plurality of data sets based on measurements taken by a plurality of sensors, each data set including information on states of a plurality of targets. The method then generates a plurality of target correlation data sets describing correlation of the targets within a first data set and at least one other data set. A Generalised Covariance Union (GCU) technique is used to merge at least some of the plurality of target correlation data sets to generate an estimate of the states of the plurality of targets.Type: ApplicationFiled: July 30, 2009Publication date: July 14, 2011Applicant: BAE SYSTEMS PLCInventors: Christopher David Claxton, David Nicholson, Steven Reece, Stephen John Roberts
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Publication number: 20110040482Abstract: A Light Detection and Ranging (LIDAR) apparatus and method are disclosed having a rotatable light source enabled to emit a light ray, the light ray being emitted at a plurality of angular intervals; a reflection device, which can be parabolic in shape, and an analysis device for calculating a position at which one or more features are present based on the angle that the light ray was emitted and the time delay associated with the received reflected light, from a feature, wherein the analysis device takes into account the reflection of the light ray from the reflection device. In this manner, light rays may be reflected from heading in one direction to improve the resolution of the LIDAR in a second direction. Furthermore, where a parabolic reflector is used, positions of features can be calculated directly in a Cartesian coordinate system. Autonomous vehicles can use a LIDAR such as described herein to improve forward looking resolution in collision avoidance systems or terrain selection systems.Type: ApplicationFiled: April 17, 2009Publication date: February 17, 2011Applicant: BAE SYSTEMS plcInventors: Richard Arthur Brimble, Christopher David Claxton
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Publication number: 20090304533Abstract: This invention relates generally to a pneumatic, hydraulic or other media driver, rotating-reciprocating cylinder apparatus to be mounted on the proximal end of CNC lathe spindles, vertical or inverted machining centers, hydraulic machining work cells or rotary transfer machines to actuate work holding chucks, work holding fixtures, clamping apparatus or work supports on the distal end of said spindles. More specifically, this invention relates to an actuating system with the capability of boosting the input hydraulic pressure to the holding device by a pre-set multiple up to 5000 psi where the boost pump is integral to and rotates with the clamp cylinder assembly.Type: ApplicationFiled: August 14, 2009Publication date: December 10, 2009Applicant: Stephens Dynamics, Inc.Inventors: Gregory A. Stephens, Alan Claxton, David Claxton, Thomas Thompson
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Publication number: 20080107548Abstract: This invention relates generally to a pneumatic and hydraulic rotating, reciprocating cylinder apparatus to be mounted on the proximal end of CNC lathe spindles, vertical or inverted machining centers, hydraulic machining work cells or rotary transfer machines to actuate work holding chucks, work holding fixtures, clamping apparatus or work supports on the distal end of said spindles. More specifically, this invention relates to an actuating system with the capability of boosting the input hydraulic pressure to the holding device by a pre-set multiple up to 5000 psi.Type: ApplicationFiled: November 2, 2006Publication date: May 8, 2008Applicant: Stephens Dynamics, Inc.Inventors: Gregory A. Stephens, Alan Claxton, David Claxton, Thomas Thompson
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Patent number: 7080592Abstract: In accordance with the present invention a pneumatic or hydraulic rotating cylinder capable of very high speeds is embodied. It is constructed of light weight materials, minimizing the mass but is given the ability to run at high speed in spite of vibrating environments, supply line condensation, contaminants and various attitudinal mounting by the anti-seizure insert bearing inserted into the distributor and sleeving the rotating shaft.Type: GrantFiled: January 6, 2005Date of Patent: July 25, 2006Assignee: Stephens Dynamics, Inc.Inventors: Phillip D. Clark, Alan Claxton, David Claxton, Thomas Thompson, Gregory A. Stephens
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Publication number: 20050150373Abstract: In accordance with the present invention a pneumatic or hydraulic rotating cylinder capable of very high speeds is embodied. It is constructed of light weight materials, minimizing the mass but is given the ability to run at high speed in spite of vibrating environments, supply line condensation, contaminants and various attitudinal mounting by the anti-seizure insert bearing inserted into the distributor and sleeving the rotating shaft.Type: ApplicationFiled: January 6, 2005Publication date: July 14, 2005Applicant: Stephens Dynamics, Inc.Inventors: Phillip Clark, Alan Claxton, David Claxton, Thomas Thompson, Gregory Stephens
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Publication number: 20050008664Abstract: The present invention concerns the use of methods and compositions to provide an improved lipid:emodin formulation for the treatment of leukemias expressing bcr-abl and other cancer with elevated tyrosine kinase activity.Type: ApplicationFiled: December 8, 2003Publication date: January 13, 2005Inventors: David Claxton, Robert Newman, Gabriel Lopez-Berestein
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Patent number: 6581509Abstract: A rotary cylinder assembly for a machine tool is provided that includes a lock check system that locks the work piece to the machine tool chuck and prevents extension and retraction of the work piece in the event of loss of hydraulic or pneumatic pressure. The rotary cylinder assembly includes a shaft end cover coupled between a fluid shaft housing and a cylinder body. The shaft end cover houses the lock check system and includes a number of flow paths that provide for extension and retraction of a piston rod connector housed in the cylinder body in response to fluid pressure supplied from the fluid shaft housing. The shaft end cover and lock check system are configured to allow small diameter cylinder bodies to be coupled thereto while providing the safety and functional features associated with the lock check system.Type: GrantFiled: May 25, 2001Date of Patent: June 24, 2003Assignee: Stephens Dynamics, Inc.Inventors: Philip Dan Clark, Alan Claxton, David Claxton, Gregory A. Stephens
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Patent number: 5869611Abstract: The breakpoints of the pericentric inversion of chromosome 16 have been cloned. Two genes, one at each breakpoint, have also been identified, as well as several forms of the inversion 16 fusion gene. Diagnostic applications for chromosome 16 abnormalities and, particularly acute myeloid leukemia are also within the scope of the present invention.Type: GrantFiled: November 1, 1996Date of Patent: February 9, 1999Assignees: The Regents Of The University Of Michigan and The Board of Regents, University of Texas SystemInventors: Pu Liu, Francis S. Collins, Michael J. Siciliano, David Claxton
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Patent number: 5837457Abstract: The breakpoints of the pericentric inversion of chromosome 16 have been cloned. Two genes, one at each breakpoint, have also been identified, as well as several forms of the inversion 16 fusion gene. Diagnostic applications for chromosome 16 abnormalities and, particularly acute myeloid leukemia are also within the scope of the present invention.Type: GrantFiled: September 25, 1995Date of Patent: November 17, 1998Assignees: The Regents of the University of Michgan, The Board of Regents University of Texas SystemInventors: Pu Liu, Francis S. Collins, Michael J. Siciliano, David Claxton