Patents by Inventor Patrick MacKenzie

Patrick MacKenzie 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 and method of checking the thickness and uniformity of a coating deposited on an elongated insulating body using a condenser sensor as part of a resonant electrical circuit
    Patent number: 5418467
    Abstract: This invention concerns an apparatus for checking the thickness and uniformity of a coating made of conducting material deposited on an elongated insulating body, this apparatus comprising:a sensor sensitive to the presence of the elongated body and forming part of an electrical circuit powered by a power supply voltage (24),measurement instruments (25) to measure an electrical quantity that is a function of the thickness of the conducting coating, at the output of the circuitequipment for processing the electrical quantity to deduce the thickness of the conducting coating,wherein the sensor consists of a condenser (10) containing two plates separated from each other by an air gap containing a dielectric material, this condenser being adapted to enable the elongated body to pass through the air gap.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: May 23, 1995
    Assignee: Alcatel Fibres Optiques
    Inventors: Bernard Floch, Patrick MacKenzie