Patents by Inventor Colin Michael Tagg

Colin Michael Tagg 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).

  • Metal detector
    Patent number: 10215875
    Abstract: A method of operation of a variable frequency metal detector having a driver circuit for establishing an alternating magnetic field in a coil system so as to generate an output signal at a given frequency, said driver circuit comprises a plurality of switches being arranged to cause the coil system to be driven at a frequency determined by the operation of the plurality switches, the method comprising the steps of generating an adjustable balance signal, combining the adjustable balance signal with the output signal of the detector, and varying the adjustable balance signal so as to provide a compensated signal whereby the output signal and/or the adjustable balance signal is filtered to remove one or more harmonics.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: February 26, 2019
    Assignee: ILLINOIS TOOL WORKS INC.
    Inventors: John Colin Moore, Colin Michael Tagg
  • METAL DETECTOR
    Publication number: 20150234075
    Abstract: A method of operation of a metal detector having a driver circuit for establishing an alternating magnetic field in a coil system so as to generate an output signal at a given frequency, the method comprising the steps of a. generating an adjustable balance signal; b. combining the adjustable balance signal with the output signal of the detector. c. varying the adjustable balance signal so as to provide a compensated signal.
    Type: Application
    Filed: February 7, 2013
    Publication date: August 20, 2015
    Inventors: John Colin Moore, Colin Michael Tagg