Patents Assigned to ABB Petercem S.A.
  • Proximity detector alternately operated to detect and self-check
    Patent number: 4866377
    Abstract: A proximity detector of the integrated electronic type which includes an oscillator, which detector detects the position of a target relative to a proximity zone limit by Eddy current changes. The detector is operated over a cycle having a first period during which its functioning is checked by alternately starting and stopping the oscillator and for a second period during which the position of the target is determined.
    Type: Grant
    Filed: April 16, 1987
    Date of Patent: September 12, 1989
    Assignee: ABB Petercem S.A.
    Inventor: Mihail Macovschi