Patents by Inventor Christopher Rene Hewson

Christopher Rene Hewson 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).

  • High bandwidth Rogowski transducer with screened coil
    Patent number: 10197601
    Abstract: A current measuring device is disclosed, comprising: an electrically conductive coil having a first end and a second end; a first screen surrounding the coil and arranged to provide a current path from the second end of the coil to a location proximal to the first end of the coil; and a second screen surrounding the first screen and the coil.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: February 5, 2019
    Assignee: POWER ELECTRONIC MEASUREMENTS LTD
    Inventor: Christopher Rene Hewson
  • Temperature compensated current measurement
    Patent number: 9970963
    Abstract: A temperature compensated current measurement device comprises a Rogowski coil having a terminating impedance arranged to adjust the attenuation of the coil to balance changes in coil sensitivity so that the output voltage indicative of measured current remains substantially unchanged, the terminating impedance having different values above and below a threshold frequency.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: May 15, 2018
    Assignee: Power Electronic Measurements Limited
    Inventors: William Frederick Ray, Christopher Rene Hewson, Joanne Marie Aberdeen
  • HIGH BANDWIDTH ROGOWSKI TRANSDUCER WITH SCREENED COIL
    Publication number: 20160327592
    Abstract: A current measuring device is disclosed, comprising: an electrically conductive coil having a first end and a second end; a first screen surrounding the coil and arranged to provide a current path from the second end of the coil to a location proximal to the first end of the coil; and a second screen surrounding the first screen and the coil.
    Type: Application
    Filed: December 23, 2014
    Publication date: November 10, 2016
    Inventor: Christopher Rene HEWSON
  • TEMPERATURE COMPENSATED CURRENT MEASUREMENT
    Publication number: 20150015244
    Abstract: A temperature compensated current measurement device comprises a Rogowski coil having a terminating impedance arranged to adjust the attenuation of the coil to balance changes in coil sensitivity so that the output voltage indicative of measured current remains substantially unchanged, the terminating impedance having different values above and below a threshold frequency.
    Type: Application
    Filed: February 1, 2013
    Publication date: January 15, 2015
    Inventors: William Frederick Ray, Christopher Rene Hewson, Joanne Marie Aberdeen