Patents by Inventor Paul Christopher Roberts
Paul Christopher Roberts 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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Publication number: 20180069493Abstract: A motor arrangement comprising: motor having a rotor, a stator, and a plurality of windings mounted on one of the rotor and the stator for acting on the other of the rotor and the stator, and a plurality of inputs coupled to the windings; and control circuit configured to operate in a riving mode in which it dynamically energises the windings via the motor inputs so as to cause the rotor to rotate relative to the stator, the control circuit being further configured to operate in a braking mode in which it continually connects at least a first and a second one of the windings to a common rail to form a closed current path to induce braking of the rotor relative to the stator, wherein the control circuit is configured to enter the braking mode in response to a trigger exogenous to the motor indicative of a fault condition.Type: ApplicationFiled: March 17, 2016Publication date: March 8, 2018Inventor: Paul Christopher ROBERTS
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Publication number: 20170367751Abstract: A medical device is described having a handle and an end effector coupled to the handle. The end effector has at least one electrode for providing electrical signals to a tissue or vessel to be treated. An RF drive circuit is provided for generating an RF drive signal that is applied to the end effector electrode. The RF drive circuit includes a resonant circuit and a frequency controller is used to vary the frequency of a signal passed through the resonant circuit in order to control the power supplied to the end effector electrode.Type: ApplicationFiled: June 8, 2017Publication date: December 28, 2017Inventors: David Ian Ruddenklau, Paul Christopher Roberts, Alan Edward Green
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Publication number: 20170274530Abstract: A method for controlling a mechanical system having a plurality of components interlinked by a plurality of driven joints, the method comprising: measuring torques or forces about or at the driven joints and forming a load signal representing the measured torques or forces; receiving a motion demand signal representing a desired state of the system; implementing an impedance control algorithm in dependence on the motion demand signal and the load signal to form a target signal indicating a target configuration for each of the driven joints; measuring the configuration of each of the driven joints and forming a state signal representing the measured configurations; and forming a set of drive signals for the joints by, for each joint, comparing the target configuration of that joint as indicated by the target signal to the measured configuration of that joint as indicated by the state signal.Type: ApplicationFiled: March 23, 2017Publication date: September 28, 2017Applicant: Cambridge Medical Robotics LimitedInventors: Edward John Mottram, Gordon Thomas Deane, Edward Tucker, Graham Veitch, Paul Christopher Roberts
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Patent number: 9707027Abstract: A medical device is described having a handle and an end effector coupled to the handle. The end effector has at least one electrode for providing electrical signals to a tissue or vessel to be treated. An RF drive circuit is provided for generating an RF drive signal that is applied to the end effector electrode. The RF drive circuit includes a resonant circuit and a frequency controller is used to vary the frequency of a signal passed through the resonant circuit in order to control the power supplied to the end effector electrode.Type: GrantFiled: May 20, 2011Date of Patent: July 18, 2017Assignee: Ethicon Endo-Surgery, LLCInventors: David Ian Ruddenklau, Paul Christopher Roberts, Alan Edward Green
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Publication number: 20160341772Abstract: A circuit configured to sense the driving current of a motor, the circuit comprising: a driver configured to generate a driving current for a motor; a first current sensor configured to sense the driving current thereby forming a first sensed current; a second current sensor configured to sense the driving current thereby forming a second sensed current, the second current sensor being more thermally stable than the first current sensor; a comparator configured to compare the first sensed current and the second sensed current below a threshold frequency to generate a thermal calibration output; and a calibrator configured to calibrate the first sensed current by the thermal calibration output to form a sensed driving current.Type: ApplicationFiled: May 18, 2016Publication date: November 24, 2016Inventors: Paul Christopher Roberts, Luke David Ronald Hares
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Publication number: 20160324537Abstract: A medical device is described having a handle, a shaft coupled to the handle and an end effector coupled to the shaft. In one embodiment, the device includes an ultrasonic transducer and is arranged so that ultrasonic or electrical energy can be delivered to a vessel or tissue to be treated. Various novel sensing circuits are described to allow a measure of the drive signal to be measured and fed back to a controller. An active fuse circuit is also described for protecting one or more batteries of the device from an over-current situation.Type: ApplicationFiled: December 8, 2014Publication date: November 10, 2016Applicant: Ethicon Endo-Surgery, LLCInventors: Alan Edward Green, Paul Christopher Roberts, Mark David Tuckwell, Peter Ralph Bonham
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Publication number: 20160317178Abstract: A medical device is described having a handle, a shaft coupled to the handle, an end effector coupled to the shaft and an ultrasonic transducer coupled to the end effector for delivering ultrasonic energy to tissue or a vessel to be treated. A drive circuit is provided for generating a drive signal that is applied to the ultrasonic transducer. In one embodiment, the drive circuit includes a resonant circuit and a controller that varies the period of the drive signal passed through the resonant circuit in order to control the power supplied to the ultrasonic transducer.Type: ApplicationFiled: December 8, 2014Publication date: November 3, 2016Applicant: Ethicon Endo-Surgery, Inc.Inventors: Alan Edward Green, Paul Christopher Roberts, Mark David Tuckwell, Peter Ralph Bonham
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Publication number: 20160257152Abstract: Systems and apparatus relating to motor control (e.g., for thermal transfer printing) include, according to at least one implementation, a motor control system including: a position controller to receive a demanded position (PD) input for controlling a motor; a torque controller coupled with the position controller, the torque controller to receive a torque bias (TB) input for controlling the motor; and a feedback circuit coupled with the torque controller and the position controller; wherein the feedback circuit is configured and arranged to combine an output from the position controller, the output being generated based on the demanded position (PD) input, with the torque bias (TB) input to generate a torque demand (TD) input to the torque controller.Type: ApplicationFiled: May 13, 2016Publication date: September 8, 2016Inventors: Simon Starkey, Phillip Lakin, Paul Christopher Roberts, Jonathan Michael Gloag
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Patent number: 9340052Abstract: A motor control system includes a motor having an associated rotary position encoder, and a controller for controlling the operation of the motor, wherein the motor is switchable between a position control mode and a torque control mode.Type: GrantFiled: September 20, 2011Date of Patent: May 17, 2016Assignee: Markem-Imaje Industries LimitedInventors: Simon Starkey, Phillip Lakin, Paul Christopher Roberts, Jonathan Michael Gloag
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Patent number: 9272531Abstract: A method of controlling tension in a tape, wherein the tape is transferable between a first spool and a second spool by a tape drive, the tape drive having a motor control system which includes two DC motors and a controller for controlling the operation of the motors, the tape drive also having two spool supports, each of which is suitable for supporting a spool of tape, and each of which is driven by a respective one of the motors, the method including only one tension setting step during a printing operation.Type: GrantFiled: February 12, 2014Date of Patent: March 1, 2016Assignee: Dover Europe SarlInventors: Phillip Lakin, Simon Starkey, Paul Christopher Roberts, Jonathan Michael Gloag
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Patent number: 9145000Abstract: A printing apparatus including a tape drive for transferring a tape carrying a marking medium, and a printhead which is operable to transfer marking medium from such a tape to print an image, the tape drive including a pair of tape spool supports, upon one of which a supply spool is mountable and upon a second one of which a take up spool is mountable, each tape spool support being drivable by a respective motor, the tape drive further including a controller to control each of the motors, wherein the tape drive is operable to position a tape adjacent the printhead such that a spacing between adjacent portions of tape from which ink is removed in successive printing operations is less than 0.5 mm.Type: GrantFiled: February 13, 2014Date of Patent: September 29, 2015Assignee: Dover Europe SàrlInventors: Phillip Lakin, Simon Starkey, Paul Christopher Roberts, Jonathan Michael Gloag
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Publication number: 20140225970Abstract: A method of controlling tension in a tape, wherein the tape is transferable between a first spool and a second spool by a tape drive, the tape drive having a motor control system which includes two DC motors and a controller for controlling the operation of the motors, the tape drive also having two spool supports, each of which is suitable for supporting a spool of tape, and each of which is driven by a respective one of the motors, the method including only one tension setting step during a printing operation.Type: ApplicationFiled: February 12, 2014Publication date: August 14, 2014Inventors: Phillip Lakin, Simon Starkey, Paul Christopher Roberts, Jonathan Michael Gloag
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Publication number: 20140225971Abstract: A printing apparatus including a tape drive for transferring a tape carrying a marking medium, and a printhead which is operable to transfer marking medium from such a tape to print an image, the tape drive including a pair of tape spool supports, upon one of which a supply spool is mountable and upon a second one of which a take up spool is mountable, each tape spool support being drivable by a respective motor, the tape drive further including a controller to control each of the motors, wherein the tape drive is operable to position a tape adjacent the printhead such that a spacing between adjacent portions of tape from which ink is removed in successive printing operations is less than 0.5 mm.Type: ApplicationFiled: February 13, 2014Publication date: August 14, 2014Inventors: Phillip Lakin, Simon Starkey, Paul Christopher Roberts, Jonathan Michael Gloag
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Publication number: 20130345689Abstract: A medical device is described having a handle and an end effector coupled to the handle. The end effector has at least one electrode for providing electrical signals to a tissue or vessel to be treated. An RF drive circuit is provided for generating an RF drive signal that is applied to the end effector electrode. The RF drive circuit includes a resonant circuit and a frequency controller is used to vary the frequency of a signal passed through the resonant circuit in order to control the power supplied to the end effector electrode.Type: ApplicationFiled: May 20, 2011Publication date: December 26, 2013Inventors: David Ian Ruddenklau, Paul Christopher Roberts, Alan Edward Green
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Publication number: 20130039685Abstract: A motor control system includes a motor having an associated rotary position encoder, and a controller for controlling the operation of the motor, wherein the motor is switchable between a position control mode and a torque control mode.Type: ApplicationFiled: September 20, 2011Publication date: February 14, 2013Applicant: MARKEM-IMAJE LIMITEDInventors: Simon Starkey, Phillip Lakin, Paul Christopher Roberts, Jonathan Michael Gloag
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Publication number: 20090214590Abstract: The present invention provides novel virus vaccines with augmented, e.g., enhanced and/or extended immunogenicity. The virus vaccines of the invention comprise an envelope-bound immunomodulatory protein, e.g., a cytokine, chemokine or costimulatory molecule. The immunomodulatory protein serves as an adjuvant to augment, e.g., enhance or extend the immunogenicity of the virus vaccine, thereby augmenting, e.g., enhancing or extending immune response to the virus when administered to a subject.Type: ApplicationFiled: July 10, 2006Publication date: August 27, 2009Applicant: Wayne State UniversityInventors: Roy Sundick, Paul Christopher Roberts, Yufang Yang, Andrew Scott Herbert