Patents Assigned to BCT Spectrum Inc.
  • Process control with guard band and fault limit
    Patent number: 5084825
    Abstract: A process control system is disclosed in which process variables are treated as mapped in n-dimensional space, where n is the number of orthogonal directions. Three functions, set, check, and term, provide the link between expected and actual conditions. The check and term functions operate on orthogonal coordinates. Each parameter has a guard band to provide a soft boundary for the parameter.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: January 28, 1992
    Assignee: BCT Spectrum Inc.
    Inventors: John H. Kelly, Mark S. Lanus
  • Data acquisition with vernier control
    Patent number: 5034745
    Abstract: Analog data is collected by conversion to a digital representation thereof via an analog to digital converter. Reference voltages for the converter are provided by digital to analog converters. The reference voltages are varied under the control of a central processing unit to establish a range of interest in the analog data. The range of interest is narrower than the conversion range of the analog to digital converter.
    Type: Grant
    Filed: August 29, 1986
    Date of Patent: July 23, 1991
    Assignee: BCT Spectrum Inc.
    Inventor: John H. Kelly