Patents Assigned to JACA Corporation
  • Apparatus for determining the fatigue condition of a structure
    Patent number: 4598592
    Abstract: Electrical signals, representative of stress induced in a structure, are developed by a piezoelectric transducer (10) attached to the structure in response to stress changes in the structure caused by loads applied to the structure. The signals storage signals from the electrical signals and the storage are processed by a signal processing circuit (12) to develop signals are accumulated by a storage unit (14) to develop a fatigue condition indication of the cumulative effect of the loads applied to the structure.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: July 8, 1986
    Assignee: JACA Corporation
    Inventor: Robert C. McMaster