Patents Assigned to Trendview Recorders Limited
  • Patent number: 6405155
    Abstract: A logging system 2 is described in which an input signal value is compared by a signal processor 12 to a trigger-band 34 and an inner-band 36 centered about a previously logged value 34 and changing at a previously determined rate of change. When the trigger-band is exceeded at point 40, intermediate points are logged representing the maximum and minimum points since the last logged point and the point at which the inner-band was left. The intermediate points enable a more accurate subsequent reconstruction of the actual signal to be made from the logged values.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: June 11, 2002
    Assignee: Trendview Recorders Limited
    Inventors: Graham Russell Cheale, Andrew Kassell
  • Publication number: 20010032061
    Abstract: A logging system 2 is described in which an input signal value is compared by a signal processor 12 to a trigger-band 34 and an inner-band 36 centered about a previously logged value 34 and changing at a previously determined rate of change. When the trigger-band is exceeded at point 40, intermediate points are logged representing the maximum and minimum points since the last logged point and the point at which the inner-band was left. The intermediate points enable a more accurate subsequent reconstruction of the actual signal to be made from the logged values.
    Type: Application
    Filed: June 19, 2001
    Publication date: October 18, 2001
    Applicant: Trendview Recorders Limited
    Inventors: Graham Russell Cheale, Andrew Kassell
  • Patent number: 6272445
    Abstract: A logging system 2 is described in which an input signal value is compare by a signal processor 12 to a trigger-band 34 and an inner-band 36 centre about a previously logged value 34 and changing at a previously determined rate of change. When the trigger-band is exceeded at point 40, intermediate points are logged representing the maximum and minimum points since the last logged point and the point at which the inner-band was left. The intermediate points enable a more accurate subsequent reconstruction of the actual signal to be made from the logged values.
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: August 7, 2001
    Assignee: Trendview Recorders Limited
    Inventors: Graham Russell Cheale, Andrew Kassell