Patents by Inventor Martin Legg

Martin Legg 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).

  • Monitoring of gas sensors
    Patent number: 7794575
    Abstract: A monitor is disclosed for monitoring an atmosphere for the presence of a target gas. The monitor includes an electrical gas sensor having a working (sensing) electrode and a counter electrode, an operational amplifier connected between the sensor electrodes, a detector, and a circuit. The sensor provides a current between the electrodes that is indicative of the amount of a target gas in the atmosphere. The operational amplifier generates an output signal according to the current flowing between the terminals where the output signal is indicative of the amount of target gas in the atmosphere. The detector detects when the current flowing between the sensor electrodes exceeds a predetermined threshold. The circuit restricts the potential difference between the sensor electrodes when the current between the terminals exceeds the predetermined threshold by supplying additional current or removing current from the working sensor electrode.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: September 14, 2010
    Assignee: Honeywell Analytics Limited
    Inventors: John Chapples, Martin Legg, Neils Hansen
  • Monitoring of gas sensors
    Publication number: 20040251144
    Abstract: A monitor is disclosed for monitoring an atmosphere for the presence of a target gas, the monitor comprising:
    Type: Application
    Filed: August 11, 2004
    Publication date: December 16, 2004
    Inventors: John Chapples, Martin Legg, Neils Hansen