Patents by Inventor Thomas W. Bach

Thomas W. Bach 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).

  • Speed sensor for a rotating member or machine
    Patent number: 9562923
    Abstract: A speed sensor for use in measuring the speed of rotation of a rotationally salient rotating member. The speed sensor comprises an electrode and a sensor circuit. The sensor circuit comprises a constant voltage source for supplying a voltage to the electrode to generate an electric field in a dielectric medium. A current detector detects current flow between the constant voltage source and the electrode due to perturbation of the electric field by passage of at least one salient feature of the rotating member through the electric field as the rotating member rotates. The current detector outputs a first signal modulated at a frequency corresponding to the frequency of perturbation of the electric field. The first signal is amplified to produce an amplified signal modulated at a frequency corresponding to the frequency of perturbation of the electric field.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: February 7, 2017
    Assignee: Cummins Turbo Technologies Limited
    Inventors: Calvin Cox, Thomas W. Bach
  • Speed sensor for a rotating member
    Patent number: 8339122
    Abstract: A speed sensor for use in measuring the speed of rotation of a rotationally salient rotating member The speed sensor comprises an electrode and a sensor circuit. The sensor circuit comprises a constant voltage source for supplying a voltage to the electrode to generate an electric field in a dielectric medium. A current detector detects current flow between the constant voltage source and the electrode due to perturbation of the electric field by passage of at least one salient feature of the rotating member through the electric field as the rotating member rotates. The current detector outputs a first signal modulated at a frequency corresponding to the frequency of perturbation of the electric field. The first signal is amplified to produce an amplified signal modulated at a frequency corresponding to the frequency of perturbation of the electric field.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: December 25, 2012
    Assignee: Cummins Turbo Technologies Limited
    Inventors: Calvin Cox, Thomas W. Bach
  • ROTATING MACHINE SENSOR
    Publication number: 20100148760
    Abstract: A speed sensor for use in measuring the speed of rotation of a rotationally salient rotating member The speed sensor comprises an electrode and a sensor circuit. The sensor circuit comprises a constant voltage source for supplying a voltage to the electrode to generate an electric field in a dielectric medium. A current detector detects current flow between the constant voltage source and the electrode due to perturbation of the electric field by passage of at least one salient feature of the rotating member through the electric field as the rotating member rotates. The current detector outputs a first signal modulated at a frequency corresponding to the frequency of perturbation of the electric field. The first signal is amplified to produce an amplified signal modulated at a frequency corresponding to the frequency of perturbation of the electric field.
    Type: Application
    Filed: November 16, 2009
    Publication date: June 17, 2010
    Inventors: Calvin Cox, Thomas W. Bach