Patents by Inventor John Charles Hill
John Charles Hill 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: 7885429Abstract: Embodiments of the invention include a system and a method for determining whether a person is carrying concealed contraband, such as an improvised explosives device or other weapon. The system includes a people tracking video subsystem, a people tracking decisioning subsystem, a concealed contraband detection aiming subsystem, and a concealed contraband detection decisioning subsystem.Type: GrantFiled: June 7, 2007Date of Patent: February 8, 2011Assignee: General Electric CompanyInventors: Peter Henry Tu, Kai Erik Thomenius, Nils Oliver Krahnstoever, Jens Rittscher, John Charles Hill, Jr., Gianfranco Doretto, Thomas Baby Sebastian, Jeffrey Michael Ashe
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Patent number: 7844030Abstract: A system includes a generator configured to output at least one voltage level and an x-ray source configured to generate x-rays directed toward an object. The system includes a module coupled to the output of the generator and to an input of the x-ray source and configured to switch or assist in switching an output to the x-ray source between a first voltage level and a second voltage level.Type: GrantFiled: November 4, 2008Date of Patent: November 30, 2010Assignee: General Electric CompanyInventors: Colin R. Wilson, Antonio Caiafa, John Charles Hill, Samit Kumar Basu, Pierfrancesco Landolfi, Peter Michael Edic
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Patent number: 7706499Abstract: Systems and methods are provided for acquiring and reconstructing projection data using a computed tomography (CT) system having stationary distributed X-ray sources and detector arrays. In one embodiment, a non-sequential activation of X-ray source locations on an annular source is employed to acquire projection data. In another embodiment, a distributed source is tilted relative to an axis of the scanner to acquire the projection data. In a further embodiment, a plurality of X-ray source locations on an annular source are activated such that the aggregated signals correspond to two or more sets of spatially interleaved helical scan data.Type: GrantFiled: March 20, 2007Date of Patent: April 27, 2010Assignee: General Electric CompanyInventors: Jed Douglas Pack, Zhye Yin, Samit Kumar Basu, John Charles Hill, Peter Michael Edic
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Publication number: 20090245467Abstract: A system includes a generator configured to output at least one voltage level and an x-ray source configured to generate x-rays directed toward an object. The system includes a module coupled to the output of the generator and to an input of the x-ray source and configured to switch or assist in switching an output to the x-ray source between a first voltage level and a second voltage level.Type: ApplicationFiled: November 4, 2008Publication date: October 1, 2009Inventors: Colin R. Wilson, Antonio Caiafa, John Charles Hill, Samit Kumar Basu, Pierfrancesco Landolfi, Peter Michael Edic
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Patent number: 7576963Abstract: A protection system for a power distribution system with one or more zones that includes at least one power-switching device connected to a power or current sensing device and a communications device. The power-switching device is communicatively coupled to at least one processing device. The at least one processing device is adapted to execute a plurality of protective functions for a zone based on information of power conditions within the zone and predetermined protective requirements of the zone.Type: GrantFiled: December 28, 2006Date of Patent: August 18, 2009Assignee: General Electric CompanyInventors: John Charles Hill, Marcelo Esteban Valdes, Ajit Wasant Kane
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Patent number: 7561393Abstract: A method of protecting a circuit having power switching devices that includes communicating a current in at least one secondary switching device to at least one master switching device and determining a presence of a fault condition within at least a first zone based at least in part upon characteristics of the current in the at least one secondary switching device communicated to the at least one master switching device to perform differential protection.Type: GrantFiled: December 28, 2006Date of Patent: July 14, 2009Assignee: General Electric CompanyInventors: John Charles Hill, Marcelo Esteban Valdes, Ajit Wasant Kane
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Publication number: 20080158751Abstract: A method of protecting a circuit having power switching devices that includes communicating a current in at least one secondary switching device to at least one master switching device and determining a presence of a fault condition within at least a first zone based at least in part upon characteristics of the current in the at least one secondary switching device communicated to the at least one master switching device to perform differential protection.Type: ApplicationFiled: December 28, 2006Publication date: July 3, 2008Inventors: John Charles Hill, Marcelo Esteban Valdes, Ajit Wasant Kane
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Publication number: 20080158752Abstract: A protection system for a power distribution system with one or more zones that includes at least one power-switching device connected to a power or current sensing device and a communications device. The power-switching device is communicatively coupled to at least one processing device. The at least one processing device is adapted to execute a plurality of protective functions for a zone based on information of power conditions within the zone and predetermined protective requirements of the zone.Type: ApplicationFiled: December 28, 2006Publication date: July 3, 2008Inventors: John Charles Hill, Marcelo Esteban Valdes, Ajit Wasant Kane
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Publication number: 20080056432Abstract: Systems and methods are provided for reconstructing projection data that is mathematically complete or sufficient acquired using a computed tomography (CT) system. In one embodiment, a set of projection data representative of a sampled portion of a cylindrical surface is provided. The set of projection data is reconstructed using a suitable cone-beam reconstruction algorithm. In another embodiment, two or more sets of spatially interleaved helical projection data are processed using helical interpolation. The helically interpolated set of projection data is reconstructed using a two-dimensional axial reconstruction algorithm or a three-dimensional reconstruction algorithm.Type: ApplicationFiled: March 20, 2007Publication date: March 6, 2008Inventors: Jed Douglas Pack, Bruno De Man, Samit Kumar Basu, John Charles Hill, Xiaoye Wu, Peter Michael Edic
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Publication number: 20080056437Abstract: Systems and methods are provided for acquiring and reconstructing projection data using a computed tomography (CT) system having stationary distributed X-ray sources and detector arrays. In one embodiment, a non-sequential activation of X-ray source locations on an annular source is employed to acquire projection data. In another embodiment, a distributed source is tilted relative to an axis of the scanner to acquire the projection data. In a further embodiment, a plurality of X-ray source locations on an annular source are activated such that the aggregated signals correspond to two or more sets of spatially interleaved helical scan data.Type: ApplicationFiled: March 20, 2007Publication date: March 6, 2008Inventors: Jed Douglas Pack, Zhye Yin, Samit Kumar Basu, John Charles Hill, Peter Michael Edic
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Publication number: 20070286460Abstract: Embodiments of the invention include a system and a method for determining whether a person is carrying concealed contraband, such as an improvised explosives device or other weapon. The system includes a people tracking video subsystem, a people tracking decisioning subsystem, a concealed contraband detection aiming subsystem, and a concealed contraband detection decisioning subsystem.Type: ApplicationFiled: June 7, 2007Publication date: December 13, 2007Applicant: GENERAL ELECTRIC COMPANYInventors: Peter Henry Tu, Kai Erik Thomenius, Nils Oliver Krahnstoever, Jens Rittscher, John Charles Hill, Gianfranco Doretto, Thomas Baby Sebastian, Jeffrey Michael Ashe
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Patent number: 4084354Abstract: A process for slicing boules of a single crystal material such as gadolinium gallium garnet (GGG) into wafers is described. The boule is prepared, by grinding preferably, so that the longitudinal boule axis corresponds to the crystallographic orientation axis of the boule. The boule is then mounted in a fixture and aligned so that the common longitudinal axis and crystallographic orientation axis is perpendicular to the saw blade. The boule is then rotated while maintaining the orientation of the combined common axis and engaged against an inner diameter rotating saw blade for a time sufficient for the blade to slice through the boule and form a wafer. The wafers obtained by this slicing process may be directly polished without the conventional lapping step to form a wafer having a surface that is substantially flat, parallel and defect free.Type: GrantFiled: June 3, 1977Date of Patent: April 18, 1978Assignee: International Business Machines CorporationInventors: Johannes Grandia, John Charles Hill