Patents Assigned to Metrex Instruments Ltd.
  • Patent number: 4631959
    Abstract: An anemometer for measuring the velocity of a fluid. The anemometer has a pivotally mounted shaft with a drag element mounted thereon for exposure to the fluid. Electromagnets are orthogonally located adjacent to a ferrite block on the shaft, and changes in position of the shaft are sensed by changes in voltage across the electromagnets. A controller senses these voltage changes and applies current to the electromagnets to produce electromagnetic force to restore the position of the shaft and balance the fluid force on the drag element. A micro-processor computes fluid speed and direction from the current applied to the electromagnets.
    Type: Grant
    Filed: December 14, 1984
    Date of Patent: December 30, 1986
    Assignee: Metrex Instruments Ltd.
    Inventor: Jiri Motycka