Patents Assigned to Logitek, Inc.
  • Fault diagnosis system for comparing counts of commanded operating state changes to counts of actual resultant changes
    Patent number: 4851985
    Abstract: A device implemented method diagnoses faults in a machine system or the like having a plurality of multi-state operating elements which are controlled by commands issued by a programmable controller. The method involves sensing the issuance of each command, sensing each change in state of an operating element and then periodically correlating the sensed commands with the sensed changes in operating states; the failure to correlate a sensed command with a sensed change in state is used to indicate the existence of an operating fault.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: July 25, 1989
    Assignee: Logitek, Inc.
    Inventors: David N. Burror, Daniel J. Opalewski, James S. Seymour