Patents by Inventor Robert Sydney Walker

Robert Sydney Walker 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).

  • Coin validator calibration
    Patent number: 6311820
    Abstract: The coin validator is calibrated by inserting a calibration key different from coins to be validated in a static position in the validator such that eddy currents are induced in the key by operation of its sensor coils so as to produce a calibration value of signals form the sensor coils as a function of the individual characteristics of the validator. The calibrating value of the sensor signals may be compared with ensemble data concerning corresponding calibration values derived from an ensemble of coin validators of the same design.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: November 6, 2001
    Assignee: Coin Control Limited
    Inventors: Malcolm Reginald Hallas Bell, Robert Sydney Walker, Dennis Wood, Les Hutton
  • Coin handling apparatus and methods of determining information regarding moving coins
    Patent number: 5651444
    Abstract: In a coin handling apparatus, a single sensor (30) detects impacts of the coin at different positions within the apparatus, and uses the output to determine the route taken by the coin through the apparatus, and the speed of the coin.
    Type: Grant
    Filed: August 25, 1995
    Date of Patent: July 29, 1997
    Assignee: Mars Incorporated
    Inventors: Robert Sydney Walker, Richard Guy Bointon