Patents by Inventor Stanley M. Metcalf

Stanley M. Metcalf 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).

  • Self teaching coin discriminator
    Patent number: 5067604
    Abstract: By combining a number of different types of coin sensors including a reflective sensor, a capacitive sensor and inductive sensors together with a logic circuit it is possible to provide for highly accurate and flexible discrimination between authorized and unauthorized coins or tokens. Fexibility is further enhanced by a self teaching feature where a microprocessor is used to iteratively adjust upper and lower value limits in the sensor circuits in response to the insertion of a limited number of sample coins.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: November 26, 1991
    Assignee: Bally Manufacturing Corporation
    Inventor: Stanley M. Metcalf