Patents by Inventor Christopher R. Hewson

Christopher R. 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).

  • Apparatus for current measurement
    Patent number: 9606152
    Abstract: A voltage to current converter is provided for use with a current measuring device, said current measuring device being operable to provide an output voltage which is an analog of a current to be measured. The converter is arranged to provide an output current which is an analog of the current to be measured. The converter comprises an electronic controller, a switching amplifier and means for measuring the output current as an analog voltage and providing a measure of said analog voltage to the electronic controller.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: March 28, 2017
    Assignee: Power Electronic Measurements Ltd.
    Inventors: Christopher R. Hewson, Joanne M. Aberdeen, William F. Ray
  • APPARATUS FOR CURRENT MEASUREMENT
    Publication number: 20140306690
    Abstract: A voltage to current converter is provided for use with a current measuring device, said current measuring device being operable to provide an output voltage which is an analogue of a current to be measured. The converter is arranged to provide an output current which is an analogue of the current to be measured. The converter comprises an electronic controller, a switching amplifier and means for measuring the output current as an analogue voltage and providing a measure of said analogue voltage to the electronic controller.
    Type: Application
    Filed: March 7, 2012
    Publication date: October 16, 2014
    Applicant: POWER ELECTRONIC MEASUREMENTS LTD
    Inventors: Christopher R. Hewson, Joanne M. Aberdeen, William F. Ray