Patents by Inventor Ian H. Quayle

Ian H. Quayle 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).

  • Analogue voltage indicator with sequence of light emitting diodes
    Patent number: 4243985
    Abstract: A circuit serves to illuminate appropriate light emitting diodes of a sequence to provide a bar graph type display of an analogue input voltage. The light emitting diodes are divided into sets with each set being associated with a respective signal processing element which may be a differential amplifier supplied with the analogue input voltage at one input terminal and a unique off-set voltage at the other. The signal processing elements handle respective contiguous ranges of the analogue voltage and the required supply voltage is reduced.
    Type: Grant
    Filed: May 4, 1978
    Date of Patent: January 6, 1981
    Assignee: Chronolog Systems Limited
    Inventor: Ian H. Quayle