Patents by Inventor Robert Harper Lees

Robert Harper Lees 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).

  • Loop sensing apparatus for traffic detection
    Patent number: 6483443
    Abstract: Loop sensing apparatus for detecting vehicles traveling along a lane of a roadway comprises an outer loop producing a region of magnetic field with the same polarity and an inner loop sized to fit within this region of constant polarity. The inner loop provides two regions of opposite polarity, so that field produced by the outer loop has a null effect on the inner loop. Detection circuitry energizes both the outer and inner loops individually for separate detection of vehicles passing over the loops.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: November 19, 2002
    Assignee: Diamon Consulting Services Limited
    Inventors: Robert Harper Lees, Richard Andrew Lees
  • Inductive loop sensor for traffic detection, and traffic monitoring apparatus and method using such a loop sensor
    Patent number: 6337640
    Abstract: An inductive loop sensor for detecting vehicles travelling along a lane of a roadway comprises a figure-of-eight conducting loop. The loop is arranged with its three segments transversely across the roadway to detect the wheels of vehicles travelling along the roadway. The length of the loop in the direction of travel along the roadway is less than 60 cms. Traffic monitoring apparatus energises the loops and detects the passage of vehicle wheels over the loops to provide for the classification of vehicles by axle count.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: January 8, 2002
    Assignee: Diamond Consulting Services Limited
    Inventor: Robert Harper Lees
  • INDUCTIVE LOOP SENSOR FOR TRAFFIC DETECTION, AND TRAFFIC MONITORING APPARATUS AND METHOD USING SUCH A LOOP SENSOR
    Publication number: 20010050621
    Abstract: An inductive loop sensor for detecting vehicles travelling along a lane of a roadway comprises a figure-of-eight conducting loop. The loop is arranged with its three segments transversely across the roadway to detect the wheels of vehicles travelling along the roadway. The length of the loop in the direction of travel along the roadway is less than 60 cms. Traffic monitoring apparatus energises the loops and detects the passage of vehicle wheels over the loops to provide for the classification of vehicles by axle count.
    Type: Application
    Filed: March 31, 1999
    Publication date: December 13, 2001
    Inventor: ROBERT HARPER LEES