Patents Examined by Donnie L. Orosland
  • Method and apparatus for indicating a changed condition
    Patent number: 5371487
    Abstract: Systems for diagnosing fault conditions in a plurality of inputs are useful in many applications. Advantageously, such systems allow troubleshooting by a single technician. The subject invention includes a plurality of sensors for producing sensor signals, each of the sensor signals indicating one of plurality of states of a parameter. A device is included to indicate that one or more of the sensor signals has changed states.
    Type: Grant
    Filed: November 10, 1993
    Date of Patent: December 6, 1994
    Assignee: Caterpillar Inc.
    Inventors: John P. Hoffman, Ricky D. Vance, Dennis A. Barney